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.
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. "