Diamond GIA certificate VS national inspection certificate, what is the difference between the two

International ID card for diamonds GIA certificate GIA certificate is a diamond identification certificate issued by the Gemological Institute of America. The 4C standard that everyone talks about every day was created by the GIA Gemological Institute of America. Later, appraisal agencies all over the world used GIA standard as a reference. GIA 　　 International ID Card GIA Certificate for Diamonds 　　　　GIA Certificate is a diamond identification certificate issued by the Gemological Institute of America. The 4C standard that everyone talks about every day was created by the GIA Gemological Institute of America. Later, appraisal agencies all over the world used GIA standard as a reference. GIA’s credibility is very, very high, because it is a non-profit organization, and reputation is the first for them, so it will not affect the appraisal results due to human factors. Diamonds with GIA diamond certificates are worldwide. Are recognized.　　　　 How to read GIA certificate?　　　　1, basic information 　　　　 basic information, including date, certificate number, shape and diamond size. The date here refers to the date when this diamond was appraised by GIA.　　　　2, 4C grade 　　　　 are carat number, color grade, clarity and cut, respectively.　　　　3, the additional information 　　　　 tells you the diamond's polishing, symmetry, fluorescence response, clarity characteristics and laser code. The laser code here is the same as the certificate number in the basic information.　　　　Laser code is not always available in every diamond! Generally speaking, there are those with less than 1 carat, and those with more than 1 carat are not, unless the customer submitting for inspection has special requirements. 4. GIA certificate number GIA’s credibility is very, very high, because it is a non-profit organization, and its reputation is the first for them, so it will not affect the appraisal results due to human factors, and the GIA diamond certificate is attached. Diamonds are recognized worldwide.　　　　5, diamond cut scale map 　　　　 diamond cut scale diagram, full depth ratio, table width ratio, crown angle, crown height ratio, pavilion angle and pavilion depth ratio are marked.　　　　6. The grade standard of clarity, color grade and cut 　　　　 can compare the position of the diamond in the GIA grade based on the previous information.　　　　 In addition to the official website, there is a QR code in the lower right corner of the GIA certificate. After scanning, it will jump directly to the GIA official website and you can directly enter the certificate number to check the authenticity.　　　　 China National ID Card National Inspection Diamond Certificate for Diamonds 　　　　 National Inspection Diamond Certificate is a diamond certificate issued by the authoritative National Jewelry and Jade Quality Supervision and Inspection Center in China in terms of jewelry and jade testing.　　　　How to read the national inspection diamond certificate 　　　　The content of the national inspection diamond certificate includes the certificate number, total mass, shape, color, clarity, table width ratio, pavilion depth ratio, precious metal detection and remarks. The national inspection diamond certificate is divided into two types: loose diamonds and inlaid models. If the inspection is an inlaid model, the total mass marked on the national inspection certificate is issued after the diamond is inlaid, that is, the total mass of the whole piece of jewelry, not The quality of loose diamonds.　　　　 The remarks column describes the description of other characteristics of diamonds that are not mentioned in the report. The treated gemstones will be marked with specific treatment methods. In some national inspection diamond certificates, the column of clarity and cut will be marked with ***. This is because according to the national inspection grading regulations, for diamonds below 20 points, only the authenticity of the diamond needs to be identified, and it is not mandatory A diamond 4C grading certificate is issued, so when the clarity is appraised as VS or above, the actual grade will be marked in the grading column, and when the clarity is appraised as SI, it will be marked as ******.　　　　 Similarly, for diamonds below 20 points, no data measurement will be performed on the cut, and ****** is directly marked in the grading column.　　　　 Will the two diamond ID card information be different? Although 　　　　 is the same authority, it’s like a physical examination in a different medical examination center, so the test results will be slightly different.　　　　 1. The scope of recognition is different. Diamonds with GIA diamond certificates are recognized worldwide, while national diamond certificates are only valid in China.　　　　2, GIA only issues grading certificates for loose diamonds, while the NGTC national inspection has two types of loose diamonds and mosaic grading certificates. Generally, what we refer to is the diamond grading certificate. 3. If the color and clarity of the same diamond detected by the two institutions are slightly different, this is because the appraisal is done by the appraiser. Although there is the assistance of instruments, the results seen by the naked eye will inevitably have a slight error , But does not affect the quality identification of diamonds.　　　　4. The national inspection and GIA diamond certificate are slightly different. For example, the GIA diamond certificate will describe the heart cut and the fluorescence grade of the diamond, but not on the NGTC diamond certificate.　　　　 Although GIA's certificates are recognized worldwide and the national inspection is only valid in China, this does not affect their assessment of diamond quality.　　　　 The above is the author's summary of the GIA certificate information for you. The information comes from the Internet. If there is anything wrong, please understand. If you need diamond setting, please pay attention to the official website of jewelry setting. Jewelry setting is waiting for your inquiry!