Mixian jade can be divided into several levels:
Mixianyu, also known as Henan County (MiCountyjade), was named after it was produced in Mixian County, Henan Province. It is also a "dual mountain jade", a jade composed of altered plagioclase. The main constituent minerals are plagioclase (mainly calcium feldspar), bismuth stone, diopside, chrome mica, epidote, and actinolite. Most of them are dense cryptocrystalline structures (grains are less than 0.1mm). Blocky, striped or plaque-like structure.
First-grade Henan jade: It is bright green, green, white, with strong luster and high transparency. The texture is dense, delicate, tough and smooth. No impurities, cracks and any other defects, the weight of the block is more than 6 kg.
Second-grade Henan jade: bright green, bean green, white, strong luster, translucent to slightly transparent. The texture is dense, delicate and tough. No impurities, cracks and other defects, the weight of the block is more than 4 kg.
Three-level Henan jade: light green, brown red, white, strong luster, slightly transparent. The texture is dense, delicate and tough. There is no broken willow, and there are some defects such as impurities and cracks. The weight of the block is more than 2 kg.
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