Preventing broken diamonds on jewellery from fake stone (figure)
18K Gold Diamond Ring Main Diamond 1.016ct
Clarity SI color KL not used
Absolute price: 19.73 million yuan
18K Gold Diamond Ring Main Diamond 1.41ct
Clarity SI is not used
Absolute price: 25.66 million yuan
Recently, the topic of jewellery fraud has been raging. In particular, the rise of diamond fraud, such as some small-scale synthetic diamonds as the "deputy stone" of "group-set" diamond jewelry, so that consumers can not guard against it, this phenomenon has aroused the industry's high attention.
Not long ago, the Jewelry Testing Center of Guangdong Geological Research Institute detected a beautiful diamond ring. It consists of 12 decorative broken diamonds “by-stones†of large-size main diamonds, each weighing between 0.09 and 0.12 carats; but after testing by the instrument, it is confirmed that 3 of the “by-stones†are synthetic diamonds. According to market price estimates, this causes consumers to lose more than 5,000 yuan.
Subsequently, several other jewelry testing centers in Guangzhou also disclosed that many pieces of diamonds with a weight of less than 0.2 carats and used in group-inlaid patterns and “miscellaneous†brands were also found to have synthetic diamonds by professional instruments. But the product manual says "natural diamonds." In the past six months, there were more than 10 similar cases detected by the Guangdi Jewelry Testing Center.
In this regard, some experts believe that most consumers only pay attention to the true and false quality and quality of diamond jewelry large-scale main stone, and rarely pay attention to small particles with diamonds, so it gives the unscrupulous merchants the opportunity to "fish and fish". At present, the market mainly adopts "high temperature and high pressure" and "chemical vapor deposition" methods to manufacture synthetic diamonds. However, because synthetic diamonds are no different from natural diamonds in shape and 4C standards, they are almost impossible to distinguish with the naked eye.
In addition to the above traps, the fraud of diamond sales is also reflected in the fraud in the identification certificate and product specification. Such as artificially increase the weight, color, clarity, cut 4C indicators of diamonds. In particular, some e-commerce, although not easy to make a fuss about the weight, but often in the cut, color fraud, such as the I white ordinary white diamonds to "super white" G color. Generally speaking, for every step of the color of the diamond, the price has a difference of 15% to 25%; for every step of the cut, the price difference is 20% to 30%.
Because the color and cut-off of the shoddy can hardly be discerned with the naked eye, experts recommend not buying big carat diamonds online. If you buy online, it is also recommended to verify the information on the website where the certificate is issued. Try not to buy products that only have instructions and no certificate.
However, the impeccable diamond jewelry displayed in the pawnshops of various places is not only the multi-party identification of the expert team, but also the strict control of the instruments, and the price is far lower than the market price, so it has become the best of the “Taobao†diamond ornaments for consumers everywhere. select.
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