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wholesale jewelry by the pound Zhou Dafu's diamond ring has no certificate below 10.
1, diamond certificate, can also be called a diamond grading certificate, diamond quality guarantee, is based on the 4C standard. Observation and detection of diamonds to form a report. 2, where the diamond is placed at ten times the magnifying glass to analyze its size, clarity, cutting, polishing, and symmetry, which is a very important link. In addition, it also includes the color level of the diamond and fluorescent detection. 3. In international practice, it is generally only aimed at the diamond 4C classification certificate of single stone at 0.30CT, that is, 30 points. Domestic is based on the national standard, which requires a diamond 4C grading certificate with a diamond with 0.20CT, that is, a diamonds above 20 points. Diamonds below 0.20CT (20 points) Diamonds below their size and value, only the diamond grading certificate based on reference significance. Essence
4. Diamond rings above 10 points in Chow Tai Fook have certificates. With less than 10 points, considering the cost of cost, there is no certificate, but it does not mean that the diamond ring is false. Extended information: The international diamond grade certificate is roughly the following: 1. International Gem Institute (IGI) -ii diamond grade certificate. It is the world's largest independent gemstology appraisal laboratory and gemstone research and education institution. 2, American Gem Institute (GIA) -gia diamond grade certificate. It is an independent non -profit organization. GIA diamond grading report and GIA diamond treatment are considered world -renowned gem certificates. 3, American Baoyu Society -AGS diamond grade certificate. Diamond wholesalers and processors often use the detailed diamond information provided by the AGS certificate to buy batch diamonds in the world. 4, Belgian diamond high -level parliament -HRD diamond grade certificate. The Belgian Diamond Senior Parliament is the official recognition of representing the Belgian diamond business industry. It has an important position for whether the diamond is naturally colored diamond or imitation diamonds after the test. 5. National Jewelry and Jade Quality Supervision and Inspection Center -NGTC Diamond Tiered Certificate. It is a national jewelery and jade professional quality inspection institution authorized by relevant national competent departments in accordance with the law. 6, American James -GEMEX® Certificate. Gemex is an American diamond optical appraisal agency, which has created the concept of scientific measurement of diamond optical effect certification. The precedent of using visual indicators (the beauty of diamonds) to evaluate and compare diamonds. 7, European Gem Academy -EGL diamond grade certificate. It has a certain professional status and popularity in the United States and Belgium EGL identification. Reference information Source: Baidu Encyclopedia-Diamond Certificate
wholesale jewelry by the pound Zhou Dafu's diamond ring has no certificate below 10.
1, diamond certificate, can also be called a diamond grading certificate, diamond quality guarantee, is based on the 4C standard. Observation and detection of diamonds to form a report.
2, where the diamond is placed at ten times the magnifying glass to analyze its size, clarity, cutting, polishing, and symmetry, which is a very important link. In addition, it also includes the color level of the diamond and fluorescent detection.
3. In international practice, it is generally only aimed at the diamond 4C classification certificate of single stone at 0.30CT, that is, 30 points. Domestic is based on the national standard, which requires a diamond 4C grading certificate with a diamond with 0.20CT, that is, a diamonds above 20 points. Diamonds below 0.20CT (20 points) Diamonds below their size and value, only the diamond grading certificate based on reference significance. Essence
4. Diamond rings above 10 points in Chow Tai Fook have certificates. With less than 10 points, considering the cost of cost, there is no certificate, but it does not mean that the diamond ring is false.
Extended information:
The international diamond grade certificate is roughly the following:
1. International Gem Institute (IGI) -ii diamond grade certificate. It is the world's largest independent gemstology appraisal laboratory and gemstone research and education institution.
2, American Gem Institute (GIA) -gia diamond grade certificate. It is an independent non -profit organization. GIA diamond grading report and GIA diamond treatment are considered world -renowned gem certificates.
3, American Baoyu Society -AGS diamond grade certificate. Diamond wholesalers and processors often use the detailed diamond information provided by the AGS certificate to buy batch diamonds in the world.
4, Belgian diamond high -level parliament -HRD diamond grade certificate. The Belgian Diamond Senior Parliament is the official recognition of representing the Belgian diamond business industry. It has an important position for whether the diamond is naturally colored diamond or imitation diamonds after the test.
5. National Jewelry and Jade Quality Supervision and Inspection Center -NGTC Diamond Tiered Certificate. It is a national jewelery and jade professional quality inspection institution authorized by relevant national competent departments in accordance with the law.
6, American James -GEMEX® Certificate. Gemex is an American diamond optical appraisal agency, which has created the concept of scientific measurement of diamond optical effect certification. The precedent of using visual indicators (the beauty of diamonds) to evaluate and compare diamonds.
7, European Gem Academy -EGL diamond grade certificate. It has a certain professional status and popularity in the United States and Belgium EGL identification.
Reference information Source: Baidu Encyclopedia-Diamond Certificate