The same is the diamond ID card. Do you really understand what they are saying?
Diamond International ID Card - GIA Certificate
The GIA certificate is a diamond certificate issued by the American Gemological Institute. The 4C standard that everyone hangs on every day is created by the GIA American Gemological Institute. Later, the accreditation bodies of all countries in the world use the GIA standard as a reference.
GIA's credibility is very, very high, because it is a non-profit organization, reputation is the first of them, so it will not affect the identification results due to human factors, diamonds with GIA diamond certificate are worldwide. Are recognized.
What are the international ID cards?
The first part is the basic information, including date, certificate number, shape lathe and diamond size. But please note that the date here refers to the date the diamond was certified by GIA.
The second part is the 4C level we often say, which is carat, color, clarity and cut.
The third part is additional information that tells you about the diamond's polishing, symmetry, fluorescence response, clarity characteristics and laser coding. The laser code here is the same as the certificate number in the basic information.
Tip: Laser coding is not every diamond! Generally speaking, it is less than 1 carat, and not more than 1 carat, unless the customer who sent the inspection has special requirements.
The fourth part is the GIA certificate number, which can be used to check the authenticity of the certificate through GIA's official website.
The fifth part shows the cut ratio of the diamond. The full depth ratio, the aspect ratio, the crown angle, the crown height ratio, the pavilion angle and the pavilion depth ratio are all marked.
The final part is the clarity, color grade and cut grade criteria. You can compare the position of your diamond in the GIA level based on the previous information.
Tips: 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 GIA's official website. You can directly enter the certificate number to check the true and false.
Diamond's Chinese ID Card - National Inspection Diamond Certificate
The National Inspection Diamond Certificate is the authority of China's jewellery and jade inspection - the diamond certificate issued by the National Jewelry Quality Supervision and Inspection Center.
What is the Chinese ID card?
The contents of the National Inspection Diamond Certificate include certificate number, total quality, shape, color, clarity, aspect ratio, pavilion depth ratio, precious metal detection and remarks.
Tips: The National Inspection Diamond Certificate is divided into two types: loose diamonds and inlaid models. If the inspection is for inlays, the total quality marked on the national inspection certificate is issued after the diamond is inlaid, that is, the total amount of the whole jewelry. Quality, not the quality of loose diamonds.
The remarks column describes the description of other characteristics of diamonds not mentioned in the report, and the treated gemstones indicate the specific treatment methods.
Partners will find that there will be a ****** in the clarity and cut-off column of some national inspection diamond certificates. Why?
Because according to the national inspection grading regulations, for diamonds below 20 points, only the authenticity of the diamond is to be certified, and the diamond 4C grading certificate is not mandatory. Therefore, when the clarity is identified as VS or above, the actual level will be marked in the rating column. When the clarity is identified as SI, the ****** will be marked in the rating column.
Similarly, diamonds below 20 points will not be measured for the cut, directly marked in the rating bar.
Will the two diamond ID cards be different?
Although it is the same authority, it is like a physical examination at different medical centers, so the test results will be slightly different.
No.1:
Diamonds with a GIA Diamond Certificate are recognized worldwide, and the National Inspection Diamond Certificate is valid only at home.
No.2:
GIA only produces a grading certificate for loose diamonds, while the NGTC national inspection has two types of loose diamonds and inlaid grading certificates. Generally speaking, we refer to the grading certificate for diamonds.
No.3:
If the color and clarity of your same diamond are slightly different between the two institutions, it is because the identification is done by the appraiser. Although there is instrumental assistance, the results seen by the naked eye will inevitably be slightly Error, but does not affect the quality of the diamond.
No.4:
The national inspection and the GIA diamond certificate are slightly different. For example, the GIA diamond certificate will describe the eight arrows and the diamond's fluorescence level, but the NGTC diamond certificate does not.
As for which certificate will be more convincing and which institution is more authoritative, both are authoritative independent institutions. Although GIA's certificates are recognized worldwide and national inspections are only valid in China, this does not affect their identification of diamond quality. The reason why we introduce the difference between the National Inspection Certificate and the GIA Certificate today is that we hope that when buying diamond jewelry, we will reduce doubts about different diamond certificates, and we should not be too demanding on diamond certificates.
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