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koochi jewelry fashion accessories wholesale Colorless D -level, the highest level, is the best.
The weight. Diamonds are based on carats as metering weights. The so -called things are rare as rare than small diamonds. Price rises naturally. 1 gram = 5 carats, 1 carat = 100 points.
The color of diamonds, the color of the American Gem Institute, from colorless to pale yellow, is divided into 23 colors, using English letters D to Z represents, and D color is the highest level. The common level of malls is i-J color. rnrn钻石的净度，净度由高到低分为，FL完美级、IF内无瑕级、VVS极微瑕)级、VS微瑕级、SI小内含物级、 P -levels include objects. The common diamonds in jewelry shops are Si, that is, "no flaws under the naked."
The cutting of diamonds refers to the geometric shape and arrangement of various petals of the finished nude diamond. The cutting is divided into cutting ratio, polishing, and modification.
The diamonds have a variety of natural colors, which are white from precious colorless cutting, rare light blue, pink to slightly yellow. The more colorless, the more white light can penetrate, and the refraction and scattered are colorful. Diamond color grading is in the classification environment of a professional laboratory, and technicians will be determined by repeated contrast between diamonds and standard color stones to be graded. The whitening diamonds are set to start with the first letters of Diamond. The best D color is 100 points.
wholesale swarovski pre-made jewelry For a finished diamond, 4C standards are used to classify internationally. 4C includes: cactage, clarity, color (color), and cut (cut). Each different standards have different hierarchical systems. The GIA hierarchical system was built in 1953 and is one of the earliest standards. The larger the head, the higher the clarity, the colorless, and the better the value.
The clarity of diamonds 1. FL has no time (perfect) refers to the cleaning of diamonds under 10 times gemstone magnifying the mirror, that is, the inside and outside of the gemstone are not seen.
2. If there is no time (no time inside) means that there is no flaw inside the diamond under 10 times gemstone magnifying the mirror, but the surface may be a little flawed, and it can be removed by reorganization.
3. VVS polar micro -flaws refer to the pavilion or the surface of the pavilion or the surface under 10 times gemstone magnifying the mirror. The difference between VVS1 and VVS2 is the latter that include very small cotton -shaped points and small stubbles.
4. VS micro -flawr refers to observing very small flaws in diamonds under 10 times gemstone. The difference between VS1 and VS2 is that the latter may have tiny cotton -like or small stubble.
5. SI Xiacai refers to the prone to seeing defects in observing diamonds under 10 times gemstone magnifying the mirror. The difference between SI1 and SI2 is the former meat 6. P1, P2, P3 heavy flaws refer to the diamonds that are easy to see small flaws under 10 times gemstone magnifying the mirror, and the naked eye can just see the naked eye. Essence
The color level of diamond
D level: completely colorless. It is the highest color grade in the color of the diamond, extremely rare!
e grade: colorless. Only gem appraisal experts can detect trace colors. It is a very rare diamond
F grade: colorless. A small amount of colors can only be detected by jewelry experts, but it is still considered colorless. It belongs to high -quality diamonds.
g — H level: close to colorless. When compared with higher color diamonds, there are slight colors. But this color -grade diamonds still have high value.
i — J: Near colorless. Slight colors can be detected. High value.
k -M level: dark color, fire color difference
people divide the cutting quality of diamonds into 5 levels: Excellent OK), fair (general) and poor (not good).
In addition to the above standards, color diamonds are based on weight and rarity.
leather jewelry clasps wholesale There are four dimensions of the standards for measuring the quality of a diamond, that is, the weight, clarity, color (color), and cut (CUT), which is usually the "4C standard". This standard was founded by GIA (American Gem Institute) and is currently the most mainstream diamond evaluation standards in the world.
The diamonds are identified and issued by international gem scholars and issued third -party independent opinions. Based on 4C standards, the price of diamonds is determined.
color
is the best color. The deeper the color, the worse the quality. In the colorless diamond classification, the top color is D color, and it is arranged to Z in turn. Here we only say that from D to J's color level, D-F is a colorless level, G-J is a near-color level. Without the meaning of collection, the precepts below the K color are also very beautiful. Because the diamonds from K will gradually be yellowish. When choosing a diamond, the color of the I-J level is also in the nearby colorless category, but it can also notice a slight yellow. Colorful diamonds, such as: yellow, green, blue, brown, pink, orange, red, black, purple, etc., belong to the treasure in diamonds, expensive. Red diamonds are the most precious.
The different color grading systems are adopted in different countries and regions. The American Gem Institute is divided into 23 levels, which are represented by English letters D -Z. The 11 levels of D -N are the most commonly used. European color level system CIBJO is represented. The new national standards formulated by China in 1996 integrated GIA and CIBJO. This standard divides colors into 12 levels, and is represented by D -N and u003CN to describe and use the percentage method and text.
In the down of D, the price also becomes lower, each color level price difference is generally 10%-45%, and the difference between the difference between the high color level is higher than the difference between the low color level.
diamond color level
D 100 pole white
e 99
f 98 high -white
7
H 96 white
i 95 slightly yellow white (brown, gray)
J 94
K 93 light yellow (brown, gray) white
L 92
m 91 light yellow (brown, gray)
n 90
u003Cn u003C90 yellow (brown, gray, gray gray )
2. Clearness
The famous diamond-Golden Celebration
The clarity grading is based on the location of the inner content, which is different from the size and quantity. From high to low, it can be divided into FL, if, VVS1, VVS2, VS 1, VS2, SI1, SI2, SI3, P1, P3, P3. Observe the degree The more obvious, the worse the quality, and the price should be reduced accordingly.
The
fl- "Flawless", flawless. There are flawless inside and outside the mirror in the inside and outside of the mirror
if- "Flawless", which is flawless inside. Under the ten -fold magnifying glass, there are only slight flower marks on the surface
vvs1, VVS2- "very very slight", which is very, very small. There are difficulties to see under the ten -fold magnifying glass. VVS1 has higher clarity than VVS2.
vs1 and vs2- "Very Slight", very small. Bad flaws can be seen under the mirror ten times, but it is difficult to identify with the naked eye. VS1 has higher clarity than vs2.
si1 and si2- "Slight", small flaws, the naked eye may be seen.
i1, i2 and i3- "Imperfect", there are flaws, you can see it with the naked eye.
If according to the standards of China, it can be subdivided into 10 levels from LC to P level. Generally, it is generally not used as a gem drill. The inlaid diamonds are divided into five levels of excellent, good, good, better, and generally.
The diamond clarity is divided into level 10, but pay attention to "small level". For example, there are differences between VS1 and VS2 in the VS level. When purchasing the finished diamond jewelry, the diamond jewelry below 0.47 carats allows the state to be regarded as small. Therefore, when you buy a diamond with a 0.47 carat, you have to spend VS1 money carefully and buy the Diamonds of VS2.
3. carat
D diamonds
In the same case of other three C, the price of diamonds is proportional to the square in weight. The greater the weight, the higher the value. The weight of the diamond is based on carats. 1 carat (CT) = 0.2 grams (g). The average one -carat is divided into one hundred copies, each of which is one point. The target of the mall price is 0.3CT, and 0.4ct is said to 30 points and 40 points. There are also levels of weight, 0.30-0.39ct, 0.40CT-0.49ct, 0.50CT-0.69ct, 0.70-0.89ct, 0.90-0.99ct, 1.00ct-50CT, 1.50-2.00ct (each level is dependent on each level respectively.逗号隔开，不是一个级别的，就算差一分，价格也会相差很多，这就是为什么象0.48~0.49，0.68~0.69，0.88~0.89......会很难买到的原因）而In the diamond certificate, the weight of the diamond is accurate to the third place after the decimal point.
The diamonds are rare and generally not large. Generally speaking, the weight of 0.1-0.24 carat is called a small diamond, which is mainly used in the group inlaid of clothing or other gem jewelry; the weight of 0.25-1 carat is called the medium diamond, which is mainly used for the main body of diamond jewelry as a ring as a ring. The price can also be accepted by the public; diamonds greater than 1 carat can be used for investment, and they already have certain value preservation and value -added.
The weight of diamonds is classified, such as 18-22 points 20 grades, 28-39 points into 30 grades, etc. (for specific purchases). The price difference between a level sometimes reaches 1,000 yuan or more. If you learn to choose the weight reasonably, you can save a lot of money.
4. Cut the work
The star of Africa
The cutting refers to the geometric shape and arrangement of the various petals of the finished nude diamond. The cutting is divided into three items of cutting ratio, polishing, and modification. Each item has five levels, from high to low in order is Excellent, very good, good, fair, poor. Generally, diamonds are cut in standard round diamonds. The top -level -cut stones can reach the closest percentage of light reflexes, that is, three E x (Excellent) cutting, but this cutting price is slightly more expensive, because its income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, and its income rate is relatively low. It is not about 5%higher than the price of the three EX cuts, but the color of the three EX stones is definitely the most gorgeous.
We several other common cutting forms include circular emerald, oval, pear-shaped, princess square, pillow-shaped, heart-shaped, eight-hearted eight arrows-Cupidcocye, etc.
The cutting standards have certain differences in each country. The Chinese inspection has divided the cutting diamonds into three levels: good, good, and average.
. Differential method
Simple identification
The simple identification method of diamond: need to use a 10-20 times large mirror to assist and make several simple observations.
Observing the waist of the diamond. If it is sandal waist, it is most suitable for this method. Because diamonds are harder than any imitation, it will not appear thin stripes like imitation products. Character appearance.
The diamonds are harder than imitation. The aspect of the fidelity of the imitation products is often more blunt than the diamond feeling, and the diamond's face line must be sharp.
The is hard -based on diamond -based fakes, and the face lines of imitation are often worn.
If the diamond leaves natural noodles, there is a chance to discover the unique "triangular growth pattern" of diamonds on the natural surface.
If the diamond collapse, the appearance is usually staircase, and the imitation of the counterfeit will be completely different in arcs or shells.
The hardness test
diamonds are the hardest natural production substances. There is nothing to draw on the diamond. If you can draw traces, it is by no means diamond.
This thermal conductivity
The breath at the same time on the debate diamond and other similar items. If the diamond is diamond, the water mist on the surface should be evaporated faster than the water mist on other items. This is because the diamond has the possession Causes of high -conducting heat.
Observation method
Observation reflex light
Mi magnifying glass to observe the waist circumference of the diamond to present a fine scrub and glitter reflex light. The characteristics of diamonds are unique.
The growth point
In observing under the magnifying glass, there are often grooves and triangular growth points on the crystal surface of the real diamond, and there are three categories: ① ordinary glass with aluminum oxide, due to the refractive index and color dispersing Improve, easy to enter, but low hardness. ② Use chemical sapphires and colorless spinels to imitate, and the hardness is close, but the refractive index is low and there is a dual refractive phenomenon. It can be seen under the magnifying glass.
Them tender identification
The chemical composition of pencils is the same as carbon and diamonds,
is just the physical structure is different, so many people use the pencil to detect the authenticity of the diamond, which is a more practical and effective method. ，在鉴定的时候，要先把钻石用水湿润，然后再用铅笔轻轻的刻划，在真钻石的晶面上，铅笔划过的地方，是不留痕迹的，而如果不是钻石，而是Glass, crystal and other materials will leave traces on the surface. Generally, the pencil is carved to identify the authenticity of the diamond. The accuracy of this method is high. The hardness is high and the refraction is good, but it will reflect more colorful light when rotating. Compared with the faint yellow and blue color light when turning, there are obvious differences.
The standards for measuring the quality of a diamond have four dimensions, namely the weight, clarity, color, and cut (CUT), which is usually called the "4C standard" Essence This standard was founded by GIA (American Gem Institute) and is currently the most mainstream diamond evaluation standards in the world.
The diamonds are identified and issued by international gem scholars and issued third -party independent opinions. Based on 4C standards, the price of diamonds is determined.
color
is the best color. The deeper the color, the worse the quality. In the colorless diamond classification, the top color is D color, and it is arranged to Z in turn. Here we only say that from D to J's color level, D-F is a colorless level, G-J is a near-color level. Without the meaning of collection, the precepts below the K color are also very beautiful. Because the diamonds from K will gradually be yellowish. When choosing a diamond, the color of the I-J level is also in the nearby colorless category, but it can also notice a slight yellow. Colorful diamonds, such as: yellow, green, blue, brown, pink, orange, red, black, purple, etc., belong to the treasure in diamonds, expensive. Red diamonds are the most precious.
The different color grading systems are adopted in different countries and regions. The American Gem Institute is divided into 23 levels, which are represented by English letters D -Z. The 11 levels of D -N are the most commonly used. European color level system CIBJO is represented. The new national standards formulated by China in 1996 integrated GIA and CIBJO. This standard divides colors into 12 levels, and is represented by D -N and u003CN to describe and use the percentage method and text.
In the down of D, the price also becomes lower, each color level price difference is generally 10%-45%, and the difference between the difference between the high color level is higher than the difference between the low color level.
diamond color level
D 100 pole white
e 99
f 98 high -white
7
H 96 white
i 95 slightly yellow white (brown, gray)
J 94
K 93 light yellow (brown, gray) white
L 92
m 91 light yellow (brown, gray)
n 90
u003Cn u003C90 yellow (brown, gray, gray gray )
The clarity
Name drills-Golden Celebration
The clarity grading is based on the location of the inner content, the size and the number are different to divide. From high to low, it can be divided into FL, if, VVS1, VVS2, VS 1, VS2, SI1, SI2, SI3, P1, P3, P3. Observe the degree The more obvious, the worse the quality, and the price should be reduced accordingly.
The
fl- "Flawless", flawless. There are flawless inside and outside the mirror in the inside and outside of the mirror
if- "Flawless", which is flawless inside. Under the ten -fold magnifying glass, there are only slight flower marks on the surface
vvs1, VVS2- "very very slight", which is very, very small. There are difficulties to see under the ten -fold magnifying glass. VVS1 has higher clarity than VVS2.
vs1 and vs2- "Very Slight", very small. Bad flaws can be seen under the mirror ten times, but it is difficult to identify with the naked eye. VS1 has higher clarity than vs2.
si1 and si2- "Slight", small flaws, the naked eye may be seen.
i1, i2 and i3- "Imperfect", there are flaws, you can see it with the naked eye.
If according to the standards of China, it can be subdivided into 10 levels from LC to P level. Generally, it is generally not used as a gem drill. The inlaid diamonds are divided into five levels of excellent, good, good, better, and generally.
The diamond clarity is divided into level 10, but pay attention to "small level". For example, there are differences between VS1 and VS2 in the VS level. When purchasing the finished diamond jewelry, the diamond jewelry below 0.47 carats allows the state to be regarded as small. Therefore, when you buy a diamond with a 0.47 carat, you have to spend VS1 money carefully and buy the Diamonds of VS2.
carat
D diamonds
In other three C, diamond prices are proportional to the square in weight. The greater the weight, the higher the value. The weight of the diamond is based on carats. 1 carat (CT) = 0.2 grams (g). The average one -carat is divided into one hundred copies, each of which is one point. The target of the mall price is 0.3CT, and 0.4ct is said to 30 points and 40 points. There are also levels of weight, 0.30-0.39ct, 0.40CT-0.49ct, 0.50CT-0.69ct, 0.70-0.89ct, 0.90-0.99ct, 1.00ct-50CT, 1.50-2.00ct (each level is dependent on each level respectively.逗号隔开，不是一个级别的，就算差一分，价格也会相差很多，这就是为什么象0.48~0.49，0.68~0.69，0.88~0.89......会很难买到的原因）而In the diamond certificate, the weight of the diamond is accurate to the third place after the decimal point.
The diamonds are rare and generally not large. Generally speaking, the weight of 0.1-0.24 carat is called a small diamond, which is mainly used in the group inlaid of clothing or other gem jewelry; the weight of 0.25-1 carat is called the medium diamond, which is mainly used for the main body of diamond jewelry as a ring as a ring. The price can also be accepted by the public; diamonds greater than 1 carat can be used for investment, and they already have certain value preservation and value -added.
The weight of diamonds is classified, such as 18-22 points 20 grades, 28-39 points into 30 grades, etc. (for specific purchases). The price difference between a level sometimes reaches 1,000 yuan or more. If you learn to choose the weight reasonably, you can save a lot of money.
This
This Star -
The cutting refers to the geometric shape and arrangement of the various petals of the finished nude diamond. The cutting is divided into three items of cutting ratio, polishing, and modification. Each item has five levels, from high to low in order is Excellent, very good, good, fair, poor. Generally, diamonds are cut in standard round diamonds. The top -level -cut stones can reach the closest percentage of light reflexes, that is, three E x (Excellent) cutting, but this cutting price is slightly more expensive, because its income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, and its income rate is relatively low. It is not about 5%higher than the price of the three EX cuts, but the color of the three EX stones is definitely the most gorgeous.
We several other common cutting forms include circular emerald, oval, pear-shaped, princess square, pillow-shaped, heart-shaped, eight-hearted eight arrows-Cupidcocye, etc.
The cutting standards have certain differences in each country. The Chinese inspection has divided the cutting diamonds into three levels: good, good, and average.
The identification method
simple identification
The simple identification method of diamond: need to use a 10-20 times large mirror to assist and make several simple observations.
Observing the waist of the diamond. If it is sandal waist, it is most suitable for this method. Because diamonds are harder than any imitation, it will not appear thin stripes like imitation products. Character appearance.
The diamonds are harder than imitation. The aspect of the fidelity of the imitation products is often more blunt than the diamond feeling, and the diamond's face line must be sharp.
The is hard -based on diamond -based fakes, and the face lines of imitation are often worn.
If the diamond leaves natural noodles, there is a chance to discover the unique "triangular growth pattern" of diamonds on the natural surface.
If the diamond collapse, the appearance is usually staircase, and the imitation of the counterfeit will be completely different in arcs or shells.
The hardness test
diamonds are the hardest natural production substances. There is nothing to draw on the diamond. If you can draw traces, it is by no means diamond.
This thermal conductivity
The breath at the same time on the debate diamond and other similar items. If the diamond is diamond, the water mist on the surface should be evaporated faster than the water mist on other items. This is because the diamond has the possession Causes of high -conducting heat.
Observation method
Observation reflex light
Mi magnifying glass to observe the waist circumference of the diamond to present a fine scrub and glitter reflex light. The characteristics of diamonds are unique.
The growth point
In observing under the magnifying glass, there are often grooves and triangular growth points on the crystal surface of the real diamond, and there are three categories: ① ordinary glass with aluminum oxide, due to the refractive index and color dispersing Improve, easy to enter, but low hardness. ② Use chemical sapphires and colorless spinels to imitate, and the hardness is close, but the refractive index is low and there is a dual refractive phenomenon. It can be seen under the magnifying glass.
Them tender identification
The chemical composition of pencils is the same as carbon and diamonds,
is just the physical structure is different, so many people use the pencil to detect the authenticity of the diamond, which is a more practical and effective method. ，在鉴定的时候，要先把钻石用水湿润，然后再用铅笔轻轻的刻划，在真钻石的晶面上，铅笔划过的地方，是不留痕迹的，而如果不是钻石，而是Glass, crystal and other materials will leave traces on the surface. Generally, the pencil is carved to identify the authenticity of the diamond. The accuracy of this method is high. The hardness is high and the refraction is good, but it will reflect more colorful light when rotating. Compared with the faint yellow and blue color light when turning, there are obvious differences.
The standards for measuring the quality of a diamond have four dimensions, namely the weight, clarity, color, and cut (CUT), which is usually called the "4C standard" Essence This standard was founded by GIA (American Gem Institute) and is currently the most mainstream diamond evaluation standards in the world.
The diamonds are identified and issued by international gem scholars and issued third -party independent opinions. Based on 4C standards, the price of diamonds is determined.
color
is the best color. The deeper the color, the worse the quality. In the colorless diamond classification, the top color is D color, and it is arranged to Z in turn. Here we only say that from D to J's color level, D-F is a colorless level, G-J is a near-color level. Without the meaning of collection, the precepts below the K color are also very beautiful. Because the diamonds from K will gradually be yellowish. When choosing a diamond, the color of the I-J level is also in the nearby colorless category, but it can also notice a slight yellow. Colorful diamonds, such as: yellow, green, blue, brown, pink, orange, red, black, purple, etc., belong to the treasure in diamonds, expensive. Red diamonds are the most precious.
The different color grading systems are adopted in different countries and regions. The American Gem Institute is divided into 23 levels, which are represented by English letters D -Z. The 11 levels of D -N are the most commonly used. European color level system CIBJO is represented. The new national standards formulated by China in 1996 integrated GIA and CIBJO. This standard divides colors into 12 levels, and is represented by D -N and u003CN to describe and use the percentage method and text.
In the down of D, the price also becomes lower, each color level price difference is generally 10%-45%, and the difference between the difference between the high color level is higher than the difference between the low color level.
diamond color level
D 100 pole white
e 99
f 98 high -white
7
H 96 white
i 95 slightly yellow white (brown, gray)
J 94
K 93 light yellow (brown, gray) white
L 92
m 91 light yellow (brown, gray)
n 90
u003Cn u003C90 yellow (brown, gray, gray gray )
The clarity
Name drills-Golden Celebration
The clarity grading is based on the location of the inner content, the size and the number are different to divide. From high to low, it can be divided into FL, if, VVS1, VVS2, VS 1, VS2, SI1, SI2, SI3, P1, P3, P3. Observe the degree The more obvious, the worse the quality, and the price should be reduced accordingly.
The
fl- "Flawless", flawless. There are flawless inside and outside the mirror in the inside and outside of the mirror
if- "Flawless", which is flawless inside. Under the ten -fold magnifying glass, there are only slight flower marks on the surface
vvs1, VVS2- "very very slight", which is very, very small. There are difficulties to see under the ten -fold magnifying glass. VVS1 has higher clarity than VVS2.
vs1 and vs2- "Very Slight", very small. Bad flaws can be seen under the mirror ten times, but it is difficult to identify with the naked eye. VS1 has higher clarity than vs2.
si1 and si2- "Slight", small flaws, the naked eye may be seen.
i1, i2 and i3- "Imperfect", there are flaws, you can see it with the naked eye.
If according to the standards of China, it can be subdivided into 10 levels from LC to P level. Generally, it is generally not used as a gem drill. The inlaid diamonds are divided into five levels of excellent, good, good, better, and generally.
The diamond clarity is divided into level 10, but pay attention to "small level". For example, there are differences between VS1 and VS2 in the VS level. When purchasing the finished diamond jewelry, the diamond jewelry below 0.47 carats allows the state to be regarded as small. Therefore, when you buy a diamond with a 0.47 carat, you have to spend VS1 money carefully and buy the Diamonds of VS2.
carat
D diamonds
In other three C, diamond prices are proportional to the square in weight. The greater the weight, the higher the value. The weight of the diamond is based on carats. 1 carat (CT) = 0.2 grams (g). The average one -carat is divided into one hundred copies, each of which is one point. The target of the mall price is 0.3CT, and 0.4ct is said to 30 points and 40 points. There are also levels of weight, 0.30-0.39ct, 0.40CT-0.49ct, 0.50CT-0.69ct, 0.70-0.89ct, 0.90-0.99ct, 1.00ct-50CT, 1.50-2.00ct (each level is dependent on each level respectively.逗号隔开，不是一个级别的，就算差一分，价格也会相差很多，这就是为什么象0.48~0.49，0.68~0.69，0.88~0.89......会很难买到的原因）而In the diamond certificate, the weight of the diamond is accurate to the third place after the decimal point.
The diamonds are rare and generally not large. Generally speaking, the weight of 0.1-0.24 carat is called a small diamond, which is mainly used in the group inlaid of clothing or other gem jewelry; the weight of 0.25-1 carat is called the medium diamond, which is mainly used for the main body of diamond jewelry as a ring as a ring. The price can also be accepted by the public; diamonds greater than 1 carat can be used for investment, and they already have certain value preservation and value -added.
The weight of diamonds is classified, such as 18-22 points 20 grades, 28-39 points into 30 grades, etc. (for specific purchases). The price difference between a level sometimes reaches 1,000 yuan or more. If you learn to choose the weight reasonably, you can save a lot of money.
This
This Star -
The cutting refers to the geometric shape and arrangement of the various petals of the finished nude diamond. The cutting is divided into three items of cutting ratio, polishing, and modification. Each item has five levels, from high to low in order is Excellent, very good, good, fair, poor. Generally, diamonds are cut in standard round diamonds. The top -level -cut stones can reach the closest percentage of light reflexes, that is, three E x (Excellent) cutting, but this cutting price is slightly more expensive, because its income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, and its income rate is relatively low. It is not about 5%higher than the price of the three EX cuts, but the color of the three EX stones is definitely the most gorgeous.
We several other common cutting forms include circular emerald, oval, pear-shaped, princess square, pillow-shaped, heart-shaped, eight-hearted eight arrows-Cupidcocye, etc.
The cutting standards have certain differences in each country. The Chinese inspection has divided the cutting diamonds into three levels: good, good, and average.
The identification method
simple identification
The simple identification method of diamond: need to use a 10-20 times large mirror to assist and make several simple observations.
Observing the waist of the diamond. If it is sandal waist, it is most suitable for this method. Because diamonds are harder than any imitation, it will not appear thin stripes like imitation products. Character appearance.
The diamonds are harder than imitation. The aspect of the fidelity of the imitation products is often more blunt than the diamond feeling, and the diamond's face line must be sharp.
The is hard -based on diamond -based fakes, and the face lines of imitation are often worn.
If the diamond leaves natural noodles, there is a chance to discover the unique "triangular growth pattern" of diamonds on the natural surface.
If the diamond collapse, the appearance is usually staircase, and the imitation of the counterfeit will be completely different in arcs or shells.
The hardness test
diamonds are the hardest natural production substances. There is nothing to draw on the diamond. If you can draw traces, it is by no means diamond.
This thermal conductivity
The breath at the same time on the debate diamond and other similar items. If the diamond is diamond, the water mist on the surface should be evaporated faster than the water mist on other items. This is because the diamond has the possession Causes of high -conducting heat.
Observation method
Observation reflex light
Mi magnifying glass to observe the waist circumference of the diamond to present a fine scrub and glitter reflex light. The characteristics of diamonds are unique.
The growth point
In observing under the magnifying glass, there are often grooves and triangular growth points on the crystal surface of the real diamond, and there are three categories: ① ordinary glass with aluminum oxide, due to the refractive index and color dispersing Improve, easy to enter, but low hardness. ② Use chemical sapphires and colorless spinels to imitate, and the hardness is close, but the refractive index is low and there is a dual refractive phenomenon. It can be seen under the magnifying glass.
Them tender identification
The chemical composition of pencils is the same as carbon and diamonds,
is just the physical structure is different, so many people use the pencil to detect the authenticity of the diamond, which is a more practical and effective method. ，在鉴定的时候，要先把钻石用水湿润，然后再用铅笔轻轻的刻划，在真钻石的晶面上，铅笔划过的地方，是不留痕迹的，而如果不是钻石，而是Glass, crystal and other materials will leave traces on the surface. Generally, the pencil is carved to identify the authenticity of the diamond. The accuracy of this method is high. The hardness is high and the refraction is good, but it will reflect more colorful light when rotating. Compared with the faint yellow and blue color light when turning, there are obvious differences.
wholesale sterling silver gemstone jewelry india The quality of the diamond depends on the 4C standard of the diamond, and the 4C of the diamond is the diamond evaluation standard. It includes diamond cards, clarity, color grades, and cutting. Card is what we often call carats, indicating the size of the diamond. The clarity refers to the amount of defects in the diamond, and the level of less defects is high, which can reflect the dazzling light. But if there are many defects of diamonds, the surface of the diamond may be very dim. The color level refers to the color level of the diamond. The color of the diamond is from the most expensive colorless to yellow and brown. The lighter the color, the easier it is to penetrate the light. This is the most intuitive among 4C.
color (color)
is the best colorless. The deeper the color, the worse the quality. In the colorless diamond classification, the top color is D color, and it is arranged to Z in turn. Here we only say that from D to J's color level, D-F is a colorless level, G-J is a near-color level. Without the meaning of collection, the precepts below the K color are also very beautiful. Because the diamonds from K will gradually be yellowish. When choosing a diamond, the color of the I-J level is also in the nearby colorless category, but it can also notice a slight yellow. Colorful diamonds, such as: yellow, green, blue, brown, pink, orange, red, black, purple, etc., belong to the treasure in diamonds, expensive. Red diamonds are the most precious. Color diamonds
The different colors grading systems are adopted in different countries and regions. The American Gem Institute is divided into 23 levels, which are represented by English letters D -Z. The 11 levels of D -N are the most commonly used. European color level system CIBJO is represented. The new national standards formulated by China in 1996 integrated GIA and CIBJO. This standard divides colors into 12 levels, and is represented by D -N and u003CN to describe and use the percentage method and text.
diamond color level
D 100 pole white
e 99
f 98 high -white
7
H 96 white
i 95 slightly yellow white (brown, gray)
J 94
K 93 light yellow (brown, gray) white
L 92
m 91 light yellow (brown, gray)
n 90
u003Cn u003C90 yellow (brown, gray, gray gray )
Clarity
The clarity grading is based on the location of the inner content, the size and quantity are divided. From high to low, it can be divided into FL, if, VVS1, VVS2, VS 1, VS2, SI1, SI2, SI3, P1, P3, P3. Observe the degree The more obvious, the worse the quality, and the price should be reduced accordingly.
The
fl- "Flawless", flawless. There are flawless inside and outside the mirror in the inside and outside of the mirror
if- "Flawless", which is flawless inside. Under the ten -fold magnifying glass, there are only slight flower marks on the surface
vvs1, VVS2- "very very slight", which is very, very small. There are difficulties to see under the ten -fold magnifying glass. VVS1 has higher clarity than VVS2.
vs1 and vs2- "Very Slight", very small. Bad flaws can be seen under the mirror ten times, but it is difficult to identify with the naked eye. VS1 has higher clarity than vs2.
si1 and si2- "Slight", small flaws, the naked eye may be seen.
i1, i2 and i3- "Imperfect", there are flaws, you can see it with the naked eye. [3]
Carat weight
In the same case of other three C, diamond prices are proportional to the square in weight. The greater the weight, the higher the value. The weight of the diamond is based on carats. 1 carat (CT) = 0.2 grams (g). The average one -carat is divided into one hundred copies, each of which is one point. The target of the mall price is 0.3CT, and 0.4ct is said to 30 points and 40 points. There are also levels of weight, 0.30-0.39ct, 0.40CT-0.49ct, 0.50CT-0.69ct, 0.70-0.89ct, 0.90-0.99ct, 1.00ct-50CT, 1.50-2.00ct (each level is dependent on each level respectively.逗号隔开，不是一个级别的，就算差一分，价格也会相差很多，这就是为什么象0.48~0.49，0.68~0.69，0.88~0.89......会很难买到的原因）
excelerty Cut a diamond rough. No one will pay attention even if it is thrown on the road. It is to give it a second life and give it gorgeous colors. Cutting work refers to the geometric shape and arrangement of various petals of the finished nude diamond. The cutting is divided into three items of cutting ratio, polishing, and modification. Each item has five levels. From high to low, it is Excellent, Very Good, Good, FAIR, Poor. Generally, what you see is a standard round diamond -type cut. The top -level -cut stones can reach the closest percentage of light reflexes, that is, three E x (Excellent) cutting, but this cutting price is slightly more expensive, because its income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, and its income rate is relatively low. It is not about 5%higher than the price of three EX cuts, but the color of the three EX stones is definitely the most gorgeous. [6]
wholesale jewelry by pound 150 lbs Diamonds are a standardized product. It is a monopoly product regardless of its brand regardless of its origin. Global diamond suppliers are really one, and the price is only rising. Diamond value and hierarchical judgment based on the 4C created by GIA, that is, the weight, cutting, color and clarity of diamonds. Only diamonds that have been strictly evaluated by 4C standards know their true value, and GIA is undoubtedly the most authoritative in the world. Diamond grade is 4C diamonds, and the following is the standard of diamond grade.
Clat
The diamond weight is calculated in carat (CT). 1 carat = 0.2 grams = 100 points. 0.75 carats are also called 75 points. The value of diamonds has increased with irregular geometric levels with the increase of diamond weight, and consumers can determine according to personal preferences and purchase capabilities. Generally speaking, only diamonds weighing more than 50 points start to have a collection investment value. The following is the diameter table corresponding to different sizes of diamonds:
Clarity
FL refers to the cleaning of diamonds under 10 times gemstone magnifying glass, That is, the inside and outside of the gemstone are not found.
if means that there is no flaw inside the diamond under 10 times gemstone magnifying the mirror, but there may be a little flaw on the surface, and it can be removed by repeatedly polishing.
vvs means that there are very small flaws at the pavilion or surface under the diamonds under 10 times gemstone. The difference between VVS1 and VVS2 is the latter that include very small cotton -shaped points and small stubbles.
vs refers to observing very small flaws in diamonds under 10 times gemstone magnifying glass. The difference between VS1 and VS2 is that the latter may have tiny cotton -like or small stubble.
si means that the diamonds are easy to see the flaws under the 10x gemstone magnifying glass, but the naked eye cannot be seen.
i1, i2, and i3 refers to observing small flaws when observing diamonds under 10 times gemstone magnifying the mirror. You can just see the naked eye that the naked eye can be seen, and there are obvious explanation and cracks.
All diamonds are observed with a large mirror with a 10x large mirror. Only the I3 level can be seen by the naked eye without effort.
color color
D level: completely colorless. The highest color level, extremely rare!
e level: colorless. Only gem appraisal experts can detect trace colors. It is a very rare diamond
F grade: colorless. A small amount of colors can only be detected by jewelry experts, but it is still considered colorless. It belongs to high -quality diamonds.
g -H: close to colorless. When compared with higher color diamonds, there are slight colors. But this color -grade diamonds still have high value.
i -J: Close to colorless. Slight colors can be detected. High value.
k -M level: dark color, poor fire color.
N — Z -Z: The color is darker, the fire color is poor.
Cut
Excel 1: It represents the standard that can only be achieved by only 3%first -class high -quality diamonds. This cut makes the diamond reflect almost all the lights entering the diamond. It is an elegant and outstanding cut.
Very good work (Very Good): It represents about 15%of diamond cutting. It can reflect the light of diamonds and cut standards, but the price is slightly lower.
It good work (Good): It represents about 25%of diamond cutting. Diamond reflects most of the light inside the diamond. It is much cheaper than VG.
A general cut (FAIR): It represents a diamond cut with a roughness of 35%, and it is still high -quality diamonds, but the light reflected by the general cutting diamond reflection is not as good as G -Class cutting.
Poor: This contains all diamonds that do not meet the general cut standards. The cutting of these diamonds is either deep and narrow or shallow and wide, which is easy to let the light come out of the edge or the bottom, so that the diamond will lose its glory.
The above is an introduction to all levels. Buying diamonds is a problem that requires comprehensive consideration in all aspects, and there are also ingredients that personal preferences. But only one purpose is to spend the least money to buy the most suitable diamonds, but after all, diamonds are luxury goods, and it will not depreciate in the current situation. It should be explained here that there is generally only 50 % of high -level diamonds that have the significance of value preservation! The above is the latest content of diamond level and diamond level control table. Consumers can check the number!