Southern Daily News (Zhong/Yu Dongxue): Synthetic gemstones camouflage natural jewels and jade consumption to guard against six traps
In addition to diamonds, many consumers will choose to purchase other gemstones to achieve value-added demand. But the purchase is not as good as the sale, many unscrupulous merchants use the consumer's misunderstanding and lack of professional ability, change the pattern to shoddy, and even use advanced means to fake. In order to make these counterfeit goods look more authentic, the criminals even induced consumers to be fooled by various stories such as ancestral rumors and graves.
To this end, the Guangdong Jewelry and Precious Metals Testing Center specifically lists the common pitfalls of jewellery and jade consumption and the common problems of precious metal consumption, so that consumers can see the tricks when they consume, and they are no longer easily deceived.
Trap one
Dyed talc, serpentine imitation name Guitian Huang
Guo Qinghong, director of the Guangdong Jewelry and Precious Metals Testing Center, told the reporter that there is a saying in the industry that "one or two Tianhuang Sansan two gold", only the best quality Shoushan stone is called Tianhuang. Since the current mining of Tianhuang has been basically stagnant, there are unscrupulous traders who are profiting from profit, often using low-grade dyed talc, dyed serpentine and other varieties to treat the field yellow.
In 2012, Guangdong Jewelry and Precious Metals Testing Center detected more than 100 batches of various imitation field yellow samples. Among them, there were about 20 batches of Shoushan Stone that could not reach the Tianhuang level. Others were dyed talc and dyed serpentine. The appearance of Tian Huang counterfeit products similar to Tian Huang.
“The appearance of these imitations is very similar to that of real Tianhuang. Professional jewelry appraisers are also difficult to distinguish through the naked eye. They usually need to be identified by means of microscopic amplification, infrared spectrometer testing and other professional detection methods.†Guo Qinghong reminded Consumers must be carefully identified and beware of being fooled.
Trap two
Synthetic green crystal imitation high-end tourmaline
In recent years, with the soaring price of tourmaline, some synthetic gems have been used in the market to synthesize high-grade tourmaline. But in fact, the price of synthetic crystal is much cheaper than the tourmaline, and the synthetic green crystal and tourmaline are very similar in appearance to the tourmaline. It is difficult for the average consumer to distinguish it by the naked eye. Once you purchase this synthetic crystal that resembles tourmaline, it will cause great economic losses to consumers.
“In 2012, we found more than 50 batches of synthetic green crystal imitation tourmaline samples. Because such products are mostly purchased in the tourism market, consumer rights protection is generally difficult.†Guo Qinghong told reporters that distinguishing synthetic green crystals and tourmalines is also To be accurately identified in a professional laboratory, it is recommended that consumers purchase such products and ask for the identification certificate and invoice issued by the authority to protect their rights and interests.
Trap three
Artificial material antique jade
Hetian jade is another high-grade jade besides jadeite. In recent years, it has risen very quickly. In addition to the similar jade imitation and Tianyu in the market, there are also fake means of artificial jade.
It is reported that antique jade is generally a comprehensive use of various physical and chemical means to simulate the appearance of various generations of jade, and some antique old people use modern computer technology to analyze the color, shape, ornamentation, craft, Characteristics such as materials, such as hydrofluoric acid nitric acid corrosion method, soil water high temperature and high pressure cooking method, Chinese medicine water boiling method, tea water boiling method, tobacco leaf boiling method, dyeing devitrification film forming method, ferric oxide Many methods such as high-pressure oil injection method, high-pressure injection method of ferric oxide-regulating resin, and many other methods can even achieve the degree of chaos. Most of these imitations are old people.
How to distinguish this kind of antique jade? Guo Qinghong told reporters that such artificial materials as the imitation of jade, often in white, green, mostly with fake soil. In fact, if you carefully observe such products, you will find that the bottom of the product is more visible, the hardness is much lower, the small steel knife can be swiped, and the real Hetian jade can not be swiped with a small steel knife.
Trap four
Glass or plastic imitation other jewels and jade
Glass or plastic imitation gemstones are very common in normal inspections. Guangdong Jewelry and Precious Metals Testing Centers basically encounter glass or plastic imitation of other jewels and jade in daily testing.
According to Director Guo, such samples are generally misleading consumers with vague names such as jade and gems when they are sold. Glass and plastic products have various colors, and can also be made into special optical effects such as cat's eye and starlight. They can be faked in appearance, and generally need to be accurately identified by professional testing. If the consumer finds a bubble that can be seen by the naked eye on the jewelry he has purchased, then the possibility that the piece of jewelry is glass or plastic is very large.
Trap five
Optimized treatment of jade imitation natural jade
Optimized processed jade, also known as jade B goods, jade C goods, such replicas are often encountered in the daily testing of the testing center. It is also common in the market to dye the quartzite as a jadeite A cargo.
According to reports, at a trade fair, the “Jade A goods†purchased by a consumer was tested by bleaching and filling the violet emerald, and the attached certificate is also a fake certificate.
Jade imitation goods need to be accurately identified by professional means such as infrared spectrometer and microscopic amplification test, which is difficult to see by the naked eye. Director Guo told the reporter that in some jade jade exhibition booths, there is often only one certificate of jadeite A in the booth. The samples purchased by consumers are not accompanied by a test certificate. Therefore, the certificate must be carefully checked when checking the certificate. Is it consistent with the real thing?
Trap six
Synthetic gemstone camouflage
Experts also told reporters that many Chinese consumers are generally taken to the sights to buy gems when they travel abroad, which is especially common in Southeast Asia. However, many tests received by the center found that the jewellery purchased by tourists is rare, and the more common ones are synthetic emerald-like natural emerald, synthetic cubic zirconia-like diamond, synthetic red sapphire-like natural red sapphire and treated red. The case of sapphire imitation of natural red sapphires. The newspaper also received a consumer complaint last year that it bought synthetic emeralds at a high price in Singapore.
Director Guo said that it is common to synthesize emerald-like natural emeralds in Singapore. It is common to synthesize red sapphire-like natural red sapphire and red sapphire-like natural red sapphire in Thailand. He advises consumers to see or ask whether the gems are natural or synthetic before purchase, and ask for certificates and bills.
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Precious metals are most prone to four quality problems
1. The purity of thousands of gold and gold jewelry is insufficient.
The quality problems of the lack of purity of thousands of gold and gold jewelry discovered by the Guangdong Jewelry and Precious Metals Testing Center in 2012 are relatively serious, accounting for about 10% of the total number of inspections, especially the lack of purity of some chain-like gold and gold jewelry. The quality problem is even more serious. The quality problem of insufficient purity of thousands of gold and gold jewelry can only be detected by X-ray fluorescence, and sometimes it needs to be detected by destructive methods such as fire test.
Second, the purity of hollow precious metal jewelry is insufficient
The quality problem of the lack of purity of the side of the hollow precious metal jewelry or the lack of purity of the flux filling hollowness leads to the lack of quality of the overall quality of the jewelry. At present, about 20% of such jewelry has such quality problems.
There are two main reasons for the lack of purity of precious metals. One is that a small number of production companies deliberately use low purity to pretend to be high-purity deceiving consumers in order to reduce costs. Another reason is the low level of manufacturing technology. .
Third, non-precious metal materials after plating imitation silver jewelry
Five percent of the silver jewellery submitted for inspection has such quality problems. This situation occurs in supermarkets in the metropolitan area and in smaller silver jewelry stores. This jewellery has a lower proportion than real silver jewellery. Jewelry of the same size will feel lighter than real silver jewellery, but most consumers have no experience and can't distinguish it. Accurate identification is also done by X-ray fluorescence.
Fourth, the precious elements of precious metal jewelry exceed the standard
Silver jewelry contains relatively harmful lead, which is relatively rare and cannot be identified by the naked eye. It can only be identified by X-ray fluorescence spectrometry or ICP.
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