The classification of Hetian jade has not been confirmed. In order to standardize the national standard of Hetian jade in the Hetian jade market in Xinjiang, the following is to see how the national standard divides Hetian jade.
I. Definition: The national standard clearly defines the origin of Hetian jade, which refers to the jade that is mainly produced by the microcrystalline-cryptocrystalline tremolite in the area of ​​Kunlun Mountain-Altun Mountain in Xinjiang. The national standard made a detailed classification on the classification of Hetian jade.
Second, according to the geological output situation classification: Shanyu: the original mine producing jade. Mountain water: transported a certain distance, has a certain degree of roundness, and is sub-angular. Acacia: transported to the middle and lower reaches of the riverbed or in the alluvial fan, the roundness is high, the shape is round and the surface is smooth.
Third, according to the color: divided into seven categories of sheep fat jade, white jade, white jade, sapphire, jasper, topaz and ink jade.
Fourth, according to the quality level: according to the quality of the good or bad can be divided into three grades: sheep fat jade, white jade, topaz, etc.: white jade, jasper, ink jade, etc.: sapphire, such as Huang Ruoqiu pear, ink as pure paint can be called For the top grade.
Fifth, according to the characteristics of the raw material texture, it can be divided into five grades.
Extra-grade grease, very soft, moisturizing, strong, pure, no impurities, no porcelain.
The first-grade grease is soft, soft and moist, very dense, pure and free of impurities, and non-porcelain.
Secondary grease or waxy luster, strong moisturizing, denser and less mottled.
Grade III grease or waxy luster, strong moisturizing, impure, motley.
Grade 4 grease or waxy luster, no moisturizing, impure, variegated or porcelain
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