What does it mean to fill the tourmaline? The prices of diamond jewellery in the market vary widely from one to two thousand to tens of thousands and hundreds of thousands. Why is the gap so large? ......Nanjing Quality Supervision Bureau conducted the "Jewelry and Jade Quality Safety and Inspection" expert online interview program yesterday, the Deputy Director of the Gold and Silver Center of the Nanjing Quality Inspection Institute and the National Registered Jewelry Quality Inspectioner Huang Wenqing asked questions from netizens. answer.
Identification certificate should pay attention to the word "handling"
How is the jade jewelry different? In jade jewelry, there are often a goods, b goods, c goods, what is the difference between them? Huang Wenqing said that the so-called jadeite jade refers to natural jade or jade that has only been subjected to waxing and heat treatment; b goods refers to the black, gray, brown and other variegated colors in the jadeite after bleaching and pickling. Organic matter filled with jade; c refers to the dyed jade. It should be specially pointed out that there is no evidence that wearing b goods and c jade will have a negative effect on human health.
Why is the difference in diamond jewelry? The prices of diamond jewellery in the market vary widely, from one to two thousand to tens of thousands and hundreds of thousands. Why is there such a big gap? Huang Wenqing said that the measurement of diamond value and quality is judged by "4c". The term "4c" is an abbreviation for four English words beginning with c, which refers to the carat weight, clarity, colour, and cut of the diamond. Diamond weight unit, 1 carat (ct) = 0.2 g. In the case of other similar conditions, as the weight of the diamond increases, its value increases geometrically. Diamond clarity classification refers to the classification of internal and external features of diamonds under a magnifying glass of 10 times. According to the current national standards in China, the bare stones can be divided into fl, if, vvs1, vvs2, vs1, vs2, si1, si2. There are 11 sub-levels of p1, p2 and p3. The color is divided into English letters d, e, f, g, h, i, j, k, l, m, n, etc. from high to low.
How is the quality of pearls judged? Huang Wenqing said that the factors that evaluate pearl quality include color, size, shape, gloss, etc., and color is an important indicator of pearl quality evaluation. The value of rose and pink conch pearls has always been high because of the low yield, so they are often more precious than other pearls. In addition, the size and value of pearls are closely related. Generally speaking, the bigger the more expensive. The shape of the pearl refers to the outer shape of the pearl, and the round pearl is as round as possible. The luster of a pearl refers to the intensity of the reflected light on the surface of the pearl and the clarity of the image. Gloss is one of the most important factors determining the quality of the pearl. The stronger the better.
What does certificate labeling mean? In the interview, some netizens asked online questions: I bought a tourmaline bracelet some time ago. The certificate is marked with “filling the tourmaline braceletâ€? I don't know what this means. “This shows that this tourmaline bracelet has been manually filled.†Huang Wenqing said that artificial filling treatment is a method of gemstone treatment, which is to artificially add some filler to the gem under a certain temperature and pressure. To improve the aesthetics of the gemstone or to improve durability. Gem "handling" methods include filling, irradiation, diffusion, dyeing, and the like. According to the relevant standards, the processed natural gemstones should be marked when naming, such as sapphire (diffusion), ruby ​​(filling), etc., so consumers should carefully check the label of the jewelry when purchasing to see if there is any correlation with “handlingâ€. Words.
Maintenance of cosmetics may damage the gemstone
In addition to purchasing, many consumers also want to know how to maintain jewelry. Huang Wenqing advises consumers to wear jewelry to avoid damage caused by collisions. It is best to take off housework and exercise. In addition, care should be taken to avoid contact with cosmetics. The use of daily life cosmetics should be avoided as much as possible, because the chemical composition of these cosmetics or perfumes may damage the gemstones, especially pearls and other organic gemstones. Cosmetic contact may also lead to gold, etc. Partial discoloration.
After wearing the diamond ring for a period of time, many people will feel that the luster of the diamond is much dimmed. How to clean it? Huang Wenqing said that because the diamond is lipophilic, the oil secreted by the human body during the wearing process and the fumes when cooking are easy to adsorb to the surface of the diamond, causing the gloss to become dull. At this time, the cotton can be wiped clean with a cotton swab. And restore the original luster of the diamond.
Remind shopping vouchers may be falsified
Many consumers will choose to buy jewelry in scenic spots, attractions, etc., but according to statistics from the testing agencies in recent years on the authenticity of jewelry purchased in tourist destinations, more than 80% will have problems. For example, jewelry is a real jewel, but the price is obviously much higher than the price of the mall, and the price is not proportional to the quality. In addition, some consumers will buy non-natural jewelry, and some merchants will also falsify on the shopping vouchers. For example, the seller said that it is a natural jade bracelet, but the invoice only marks "jade bracelet", which brings consumers rights protection. Great difficulty.
In addition to trying not to buy jewelry at tourist destinations, Huang Wenqing reminds consumers to choose regular purchase channels, such as shopping malls, specialty stores, etc. when purchasing jewelry, and ask for and save the invoices for rights protection. In addition, please pay attention to the jewelry certificate issued by the legal institution with the qualification of inspection, and pay attention to the identification label and the imprint on the precious metal. If consumers find that Nanjing Real Estate Jewelry has quality problems, they can report to the Quality Supervision 12365 complaints.
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