When you buy a good-quality big carat diamond at a discount of about 10% below the market price, don't be too happy. Maybe this diamond is a chemically synthesized fake diamond. The Consumer Alert issued by the Shanghai Gold Jewelry Industry Association yesterday stated that a diamond synthesized by chemical vapor deposition (referred to as CVD diamond) has quietly flowed into the mainland through Hong Kong. The National Jewelry Quality Supervision and Inspection Center has detected it. Two batches. The center found in the test that this chemically synthesized diamond is very similar to natural diamonds and is difficult to distinguish from natural diamonds by the naked eye. To this end, the City Gold Jewelry Industry Association reminds consumers that when purchasing diamonds, they must enhance their awareness of rights protection, retain invoices and corresponding quality inspection certificates, and go to the professional inspection agencies set up by the national quality inspection department in this city to carry out true and false identification. . The Shanghai Gold Jewelry Industry Association said in the consumer warning that this is the latest "fake inflow" problem. The National Jewelry Quality Supervision and Inspection Center (NGTC) has discovered two batches of chemical vapor deposition methods in the recent daily commission inspection. Synthetic diamonds, mostly around 0.5 carats, are nearly colorless, mostly VS grades. It is difficult to distinguish them from natural diamonds with the naked eye and microscopic magnifying glass. After detection by Diamond View, blue-green fluorescence and blue phosphorescence are visible. , a growth texture with the characteristics of a synthetic method. The NGTC laboratory identified the conclusion as a CVD synthetic diamond and was heat treated after synthesis. According to experts from the Gold Jewelry Industry Association, since this chemical synthetic diamond is mainly imported from the mainland through the legal procurement channels of Hong Kong, China, and the trading rules of natural diamonds are used, the supplier has not made any explanation, and the price is only lower than natural diamonds. About 10%, it is very easy to get away with it. At present, the National Quality Inspection Department has set up professional testing institutions at Yayijin Store, No. 288, Fuyou Road, Shanghai, Yuyuan Garden , Laotang Gold, No. 88, Lishui Road, and No. 1288 Sichuan North Road, to strengthen diamonds, etc. Identification of natural gemstones.
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