Jewelry should be seen when purchasing the modified model.
Nowadays, the jewellery consumption boom has arisen, and colored gemstones are in the limelight. What is not known to ordinary consumers is that some jewellery and jade have undergone professional heat treatment and dyeing methods, and their price is far from the true value. The reporter visited the market and found that the colored gemstones with elaborate makeup can climb ten times or even more than 100 times, which makes people spend a lot of money.
When Ms. Fan went to Southeast Asia to spend thousands of dollars to buy a sapphire ring, friends who have recently understood jewelry, the gems may have been treated. After being dubiously identified, she was told that the gem was indeed a problem. This rough stone produced in Sri Lanka is not a translucent, milky white, lustrous corundum. It is not a gemstone grade. It is close to the transparent blue gemstone when heated by high temperature. The industry evaluates its actual price as only one-tenth of the purchase price.
The reporter unannounced visits to some of the smaller gemstone shops and exhibitions in Tianjin, and learned that the heat-treated colored gemstones sold by the merchants accounted for a high proportion. Some faint, low-value gemstones are also dyed. Under the magnifying glass, it can be seen by the naked eye that such gemstones are usually loose in structure and the dye remains in the pores. The insiders privately revealed that a considerable proportion of the amethysts that sell well are "transformed" by some kind of smoke crystal heat treatment. In addition, in addition to the jade dyeing that people usually know, the staining of coral, amber, chalcedony, crystal, hibiscus, opal, turquoise, and pearls is also increasing. Some of the poor quality jade has been dyed and the price has risen sharply.
According to the experts of Tianjin Baoyu Stone Association, the share of Caibao in the overall market of gold and jewelry continues to expand. In 2014, the price of Caibao increased by about 30%. The next few years will still be the big development period of colored jewellery. Driven by the interests, a variety of jewels that have been "made" at home and abroad have emerged in an endless stream. In particular, the colored gems that have been heat-treated and dyed have become more and more popular. For example, amber in an organic gemstone is softened or melted after heat treatment, and after cooling, it becomes a transparent, relatively pure amber. The actual price of processed amber is also tens of dollars, but the merchants are priced at more than 1,000 yuan.
According to professionals at the Tianjin Gemstone Testing Center, consumers should not only stay in the knowledge of the name and price of jewelry, but also need to have a more professional understanding. It is recommended that people buy jewelry with a certificate of identification from well-known brand merchants, and people also need to know the professional knowledge of the certificate. A number of abbreviations are used in some international certificates to indicate the extent and extent of treatment of the gemstone. H(d) in the certificate represents a significant residue of heat treatment, H(Be) represents heat treatment by chemical elements, C represents coating treatment, D stands for dyeing treatment, and O stands for oil immersion treatment. These marked jewels are generally not collectible. Reputable brand jewellery merchants will mark “untreatedâ€, and pure natural jewellery will have real appreciation potential.
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