“Let me see, is this string of jade really Hetian jade?†“Looking at this tourmaline is it true?†On the morning of the 2nd, it was jointly organized by the Quality and Technical Supervision Bureau of Jinan and the Tianqiao Branch of the Quality Supervision Bureau. On the scene of the “Measuring Huimin Entering the Community†campaign, hundreds of citizens surrounded the quality inspection personnel who came to engage in activities, and took out their own jewelry, jade, sphygmomanometer and other objects, hoping to let experts identify the true and false of the baby.
Ms. Wang came to the event early, and she took out a translucent white safety buckle that her daughter bought in Beijing. "This Ping An buckle was bought five years ago. At that time, it cost more than 800 yuan. It is said to be Hetian Yu. I don't know if it is true or not." Ms. Wang said. At the event, the staff of the Gold and Jewelry Appraisal Center of the Municipal Quality Supervision Bureau put the safety buckle into the refractometer. After some tests, they told Ms. Wang that this safety buckle was not a Hetian jade but a glass product.
According to the tester Zhang Zhongqiang, the jade of different materials is different in refractive power, so the authenticity can be distinguished by a refractometer. Under normal circumstances, the refractive index of jade is 1.61, the refractive index of jadeite is 1.66, and the refractive index of glass is only 1.50. The safety of Ms. Wang is 1.54, which is closer to glass products. He told reporters that in the tests that have been done before, many jade stones that look very transparent are actually made of glass.
Tourmaline is a kind of gem that is popular in the collection industry recently. The recent price has climbed all the way, but at the inspection site on the 2nd, the inspectors found that the glass was posing as a tourmaline. "Now the price of a carat is generally more than a thousand dollars. If it is glass, it is worth a few dollars. The difference is too big. So remind everyone to buy such jade. You must go to a regular business and buy goods with an identification certificate." Zhang Zhongqiang Say.
In just 2 hours from 9:30 am to 11:30 am, the quality inspector's tester has tested hundreds of pieces of jewelry. Zhang Zhongqiang told reporters that it is estimated that at least half of the hundreds of items are fake. Many of them are quartzites that are dyed and pretending to be jade. This situation is easier to distinguish, and people who know how to use it can be seen with the naked eye. There are also some jade stones that are of poor quality. After pickling, they turn into jade, which is also known as "B goods". This requires professional testing by means of ultraviolet fluorescent lamps and other equipment.
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