Zhou Dasheng stands for brand name,

Pt950 represents platinum 950,

Among them, l is only used by merchants or manufacturers to represent a certain meaning, which has little to do with consumers and will not affect the authenticity and quality of their goods.

Extended data:

The authenticity of jewelry can be judged by the jewelry appraisal certificate. Generally, there are the following kinds of jewelry appraisal certificates.

Gemmological Institute of America.

The certificate of diamond appraisal issued by Gemological Institute of the United States proves that internationally renowned diamond appraisal institutions have laser codes consistent with the certificate on the waist edge of diamonds, which can also be inquired in official website. GIA was founded in Los Angeles 193 1. It founded and put forward the international scoring system.

IGI

The International Gemological Institute in Antwerp is the oldest gemological institute. 1975 has established laboratories in new york, Bangkok, Mumbai and Tokyo. The IGI Diamond Report is essentially a statement, which verifies the authenticity of diamonds with the help of a world-recognized system and provides reliable and correct diamond identity and grade.

a coquettish young girl

(Swiss Cooper Gemological Laboratory) Goblin-Goblin Gemological Laboratory is a world-famous appraisal laboratory in colored gems with a long history. In the identification of gem processing, the identification of origin is in a dominant position.

Baidu Encyclopedia-Jewelry Appraisal Certificate