The professional testing institutions certified by the national certification body, with professional, authoritative and impartial identification as consumers, in the quality of jewelry, has become an important basis for consumers to rest assured consumption. Regular jewellery sales should have matching identification certificates to clarify the quality of the jewelry from the quality and ensure the consumer's right to know. Therefore, consumers must not forget to ask for an identification certificate when purchasing jewelry, and carefully check whether the corresponding contents of the product label and certificate are consistent, especially the number and photo.
At the same time, there are corresponding international and standardized sets of identification standards for diamonds. Therefore, although the content and items presented on the diamond identification certificate may be similar. However, it must meet several basic necessary and sufficient conditions. The items related to the diamond identification certificate are as follows:
1, diamond picture:
Located in the front center of the diamond identification certificate, it should be the corresponding physical picture of the diamond ring or boring. The filming attached to the certificate should be consistent with the purchased object.
2. Number:
The diamond number of the regular diamond identification certificate will be the same as the number on the price tag attached to the diamond ring. This number is generally not repeatable and unique.
3, steel stamp:
The diamond identification certificate must have a clear seal of the wording of the unit and the anti-counterfeiting mark of the appraisal unit.
4, Date (Date):
The date on the certificate refers to the date at which the diamond was identified.
5, ç¢ type (Shap & Cut):
Refers to the shape of the diamond cut, generally more round diamonds, and square and diamond.
6, size (Measurements):
This project records the maximum diameter of the diamond and the size of each major part of the body, in mm.
7, weight (Weight):
On the certificate, the weight of the diamond is in the carat accurate to the third decimal place. Also marked as total weight, the unit is generally grams (g).
8, color grade (Color Grade):
The color classification of the diamond, according to the GIA color scale table, from completely colorless D to a yellow-brown Z, is divided into 23 levels. Among them, the DEF grade belongs to the colorless range, GHIJ belongs to the near colorless range, KLM is slightly yellowish, and N below is yellowish. The color diamond below the Z is very expensive.
9, Clarity Grade:
The distinction between diamond clarity grades is the sum of the internal features and external features of the diamonds detected by a skilled appraiser under a tenfold magnifying glass. Factors such as size, number, location, traits, color, or visibility of the feature determine the level of clarity. It is divided into five levels: FL (no flaw), VVS (very small ç‘•), VS (micro ç‘•), SI (å°ç‘•), I (大花).
More jewellery identification knowledge, please pay more attention to China Jewelry Merchants Network.
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