High precision is not necessarily a true gem
The housing market has stagnated, the stock market has fluctuated drastically, and the gold market has repeatedly hit new lows. Under this background, many ordinary people (603,883) invested investment in wealth management. However, it is difficult to distinguish the gemstones. It is a high school to identify the gemstones. Dr. Liu Xueliang, an expert at the Gem Testing Center of East China University of Science and Technology, said: "As long as you study hard and gain experience, you can do it!" Recently, East China University of Science and Technology A series of events sponsored by the “Eye of the Eyesâ€, through the expert lectures, on-site treasures and other forms, to popularize the gem identification skills to the public.
Five ways to identify authenticity
East China Institute of Technology National Gemological Testing Center is based on the material science discipline and analytical testing center of the school. It is the first national gemological testing authority approved by the General Administration of Quality Supervision, Inspection and Quarantine and the China Laboratory Accreditation Committee in East China. Dr. Liu Xueliang said that in modern society, the identification of authenticity has become more convenient because of the scientific instruments. However, at the scene of shopping and Taobao, people still rely mainly on human sensory organs. Liu Xueliang believes that most of the content can be identified through observation, but the observation ability needs to have a gradual accumulation process.
For example, the identification of diamonds has at least five methods in addition to instrumental testing. One is the perspective test: For the most popular round multi-faceted diamond on the market, draw a line on the paper and press the diamond face down on the line. If you can't see the line through the diamond, it will be true. The second is the thermal conductivity test: the sample to be tested is placed on a glass plate together with a sample known as a diamond, and the two are ventilated to observe the spread of the mist. The fog on the diamond will quickly dissipate and the imitation will disappear for a longer period of time. The third is the lipophilic test: a diamond pen (special pen for oil-based ink) is scribed on the surface of the diamond, showing an uninterrupted straight line; and the surface of the imitation is lined with intermittent dotted lines. The fourth is the dispersion test: the true diamond reflects only three colors, white, orange, and blue, and the imitations and synthetics are colorful. The fifth is to enlarge the inspection: observe various information related to the growth structure, such as inclusions, growth lines, cleavage lines, beards, and so on.
Five strokes to see the purchase trap
How to cultivate observation ability? Liu Xueliang believes that this is a long-term process. The main method is to see more, learn more, and think more. The subtle features, the difference between true and false must be observed many times before they become the experience stored in the mind. The more experience, the stronger the ability to identify.
Dr. Liu Xueliang summed up five common buying pitfalls: synthetic and processed products are sold naturally; low-end posing as similar high-end products; confusion concept (jade, gemstone; hardness, fire color, color; origin or synthesis company; 18KGP Etc.; sold by travel or winning; the certificate does not match the product being sold. The concept of confusion includes a variety of means, such as: using the abstract names such as "jade" and "gem", using the hardness, fire color, color to confuse the consumer, confusing the origin or synthesis company with the name of the gem, using the "18KGP" and other marks It creates the illusion of "18K". In fact, there are clear requirements for the name of the gemstone in the industry. Only the specific names such as “Jade†and “Hetian jade†can be used. The name “Hetian jade†is also irrelevant to the place of origin, but only represents one category. Hardness, fire color, color, etc. are not the more accurate the order of magnitude.
Dr. Liu Xueliang suggested that the research and investment of gemstones will not be completed overnight. The understanding of gemstones is insufficient, and the risk is high. The best way is to be a happy collector before entering the jewelry industry. Try to get to know some people, such as gemologists, collectors, traders, consumers, etc., so that people around you know that you are researching and collecting gems, and let them be your friends, because these people may be your future Source of supply or customer. He pointed out that jewellery investment also has risks, including high purchase price, lack of choice of products, lack of market understanding, and unsound channels.
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