Beware of jewellery fraud and new patterns

China has become the third largest jewellery and jade market in the world and is the world’s largest jade processing and consumer country.

However, the reporter learned from the “National Jewelry Quality Inspection Agency Exchange Conference 2011” held yesterday in Guangzhou that, along with the fiery jewelry market, various fake and shoddy jewels are also flooded with the market, which has greatly damaged the rights and interests of consumers and hindered them. The healthy development of the jewelry market.

To this end, Yangcheng Evening News reporter interviewed relevant experts, hoping to help readers understand some of the fraud secrets.

Ice treatment of jadeite Recently, there has been a kind of ice treatment on the market. The ice jadeite is thrown along the sample decoration (split), and then hollowed out in the middle of the sample to fill the colored dye (for the time being, only the green dye filling method was found). The adhesive is then used to bond the cut two parts together. According to jewelry appraisal professionals Chen Meiling and Deng Lei, ice treatment of jade retains most of the external features of the jade (A cargo) and is therefore not easily detected.

When consumers purchase jadeite, they need to pay attention to the bright colors of jadeite. Here is the dye enrichment part. The brightly coloured part of the ordinary dyed jadeite is in the form of a wire mesh, while the middle part of the ice treated jadeite is green and distributed in masses. The color distribution is basically in the same plane. The naked eye feels dull and has no color roots.

Guo Qinghong, head of Guangdong Provincial Quality Supervision Jewelry Precious Metals Inspection Station, told the Yangcheng Evening News that the treated jadeite had no value at all and was far from the value of real A goods.

The black-stained epidermis and the Tianyu Land and Resources Department's Guangzhou Mineral Resources Supervision and Inspection Center's Deng Changyi explained that the Hetian jade dyed by epidermis is more common in the market and is mainly used to imitate “seed material”, but the epidermis is mostly yellow or brown-red. The treatment of black skin appeared recently in Guangzhou for the first time. From the effect point of view, this dyeing has a certain depth and is very deceptive.

Guo Qinghong told the reporter of the Yangcheng Evening News that natural black skin and Tian Yu also called Moyu. The price is similar to that of Hetian Yuzhong’s sapphire.

Guo Qinghong said that judging the price of Hetian jade mainly depends on the texture and the place of production is less important. To rank prices from the category, he thinks from high to low, followed by suet white jade, white jade, topaz, jasper, and sapphire. There are four main factors that affect Hetian jade's price: craftsmanship, design, personal preferences of consumers, and whether it comes from the head of the master.

According to Guo Qinghong, there is a grandmaster's auction price of Hetian jade that has reached more than 500,000 yuan. However, if the same work is from the hands of an ordinary craftsman, the price may be only about 50,000 yuan.

The tourmaline jewelry that is doped with other precious stones is favored by consumers for its colorful colors. Many young people will now wear tourmaline jewelry as fashion.

However, at yesterday’s exchange meeting, jewellery experts stated that the tourmaline jewelry on the market is often doped with other kinds of precious stones, such as epidote.

The standard for purchasing tourmaline is first to be thorough. The tourmaline requires crystal clearness, the more transparent the better the quality, and there should be no obvious fog or opacity; second, it depends on the fineness. The tourmalines are more expensive in red, blue, and green, and they are richer in color in necklaces and bracelets. The color of the tourmaline is relatively rich, and the more valuable is the double color tourmaline or multicolor tourmaline. The inner green infrared "watermelon tourmaline" is more precious; in addition, the tourmaline cat's eye belongs to the top grade tourmaline.

Experts said that the purchase of tourmaline depends on the degree of purity. The tourmaline is relatively brittle and prone to cracks. The interior is very pure and the tourmaline is relatively rare and belongs to the top grade.

Artificially hot-pressed amber amber, an ancient gemstone jewelry material, has become one of the gemstones that consumers love to wear. With the decline in the production of natural amber, which is the main producer of natural amber, the price of natural amber in the international market has steadily increased in recent years. In recent years, the price of amber raw materials has risen by 50%-100%, while the rare green amber and blue amber in amber have risen 20-30 times.

In view of the decreasing production of natural amber, there are manufacturers who manufacture large quantities of hot-pressed amber. Some experts told the reporter of the Yangcheng Evening News that the price difference between natural amber and artificially treated amber varies greatly, even reaching several times.

Guo Qinghong told reporters that although there are no significant differences in the appearance of the two types of amber, only natural amber has a collection value. "With the development of science and technology, many jewellery fraud methods have emerged in an endless stream, making it hard for consumers to guard against.