Under ultraviolet light, real natural jadeite has no fluorescence reaction.
Under the soaking of chemicals, a large number of resin chemicals remain in jadeite, and fluorescence will appear under the irradiation of purple light.
Other inspection methods of jade:
1, dripping water identification method: drop a drop of water on jade. If it is dewdrop-shaped, it is real jade.
2, two-handed touch method: If it is real jade, it feels cold and lubricated by hand.
3, high-light observation method: observe the jade in the high light, the color is clear, and the green distribution is uniform.
4, the tip of the tongue identification method: the tip of the tongue licking the real jade has astringency, and the fake jade does not.
5, magnifying glass observation method: you can also use a magnifying glass to observe, mainly to see if there are cracks, the value of cracks is greatly reduced.
Extended data
The jade certificate only identifies the true and false, not the grade.
If there are marks such as CMA (China Metrology Certification) and CAL (Quality Supervision and Inspection Organization Certification) on the appraisal certificate and the steel seal of the inspection center can be inquired in official website, it means that the product conforms to the certificate appraisal. "If the composition meets the standards of the corresponding jade, you can issue the corresponding certificate. However, the certificate can only identify the types of jade and precious stones, not their quality and price. "
For example, at present, the classification of diamonds is relatively mature, so the identification certificate includes shape, size, carat, color, type, distribution, clarity and many other contents. Consumers can measure the value of diamonds according to this information, but at present, there is no mature classification standard for jade such as Hetian jade and jadeite in China. The appraisal certificate can only prove that this thing is true, but the quality and price are quite different.
Cctv. Com- the routine of winning the prize to buy jewelry is still in the industry: the certificate is only serious and fake, and the grade is not recognized.