Hetian jade is mainly composed of tremolite minerals. It is a famous jade variety. Among them, the white fat of white fat is "white as a fat", and the texture is delicate and moist. It is the best in jade and can be met. The unique microstructure of Baiyu is characterized by a special internal texture, which has a discriminating significance. Illumination from the side with a strong flashlight reveals the presence of internal texture by the naked eye.

Hetian jade's condition:

According to the state of output, white jade raw materials are generally divided into three types: mountain material, mountain water material and duck material. Mountain material: refers to jade material extracted from the original vein of white jade. Generally, the edges and corners are sharp, the cracks are more, and the texture is poor. Because it is not weathered, it is not skinned.

Mountain stream water: After the original veins have been exposed to the surface, they have experienced a certain degree of physical weathering and naturally collapsed. After being transported by glaciers and seasonal floods, they have a certain distance but are not completely sorted. The mountain water is not as sharp and angular as the mountain material, has a certain degree of roundness, less cracks, and the texture is generally better than the mountain material.

Acacia: The jade in the original vein is transported and sorted by the river for a long distance. The relatively loose and multi-cracked part is gradually worn away and becomes a small piece of jade with good roundness and less crack. For the sake of the ingredients. Most of the ingredients are brown, maroon or black.

The apparent degree of grease of Hetian jade is related to the microstructure of Hetian jade, and the microstructure is closely related to the geological environment when Hetian jade is formed, that is, it has a certain relationship with the place of origin. In general, the white jade produced in Xinjiang has a strong luster, and the white jade produced in Qinghai is poor. The white jade produced in Russia is somewhere in between. By comparing Hetian jade with other jade, the grease luster can be easily identified.

Identification of internal textures:

The textures in white jade mainly have the following manifestations:

1. The uniformly distributed cloud-like texture resembles white clouds in the sky and is evenly distributed in fine floc. This texture is mainly found in high-quality granules produced in Xinjiang.

2. The cloud-like internal texture of the uneven distribution is cloud-like, but the distribution is uneven. This texture mainly appears in the general materials of Xinjiang.

3. The semi-transparent shape with milky texture is opaque and translucent under the side light illumination. Similar to diluted milk, sometimes there are small agglomerates with relatively poor transparency. This phenomenon is common in Xinjiang mountain production.

4. Irregularly distributed irregular strips have an irregular strip oriented distribution in a milky translucent substrate. This phenomenon mainly occurs in the mountain materials produced in the Yutian mining area in Xinjiang.

5. Irregular granular shapes with different transparency of granular mosaic structure are inlaid with each other. This phenomenon mainly occurs in Russian white jade.

6. Under the sidelight illumination of “sugar granular structure”, similar to many sugar particles gathered together, the “sugar grains” are relatively transparent inside, and the “sugar grains” are filled with opaque flocs. This phenomenon is common in white jade produced in Qinghai.

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