Produced in the area of ​​Dachang, Jinglong County, Guizhou Province. It is a fine-grained quartzite containing green kaolinite. The texture is fine, but the color is not as bright as that of Dongling and Miyu. The scales of kaolinite are not obvious and the distribution is not uniform, so the color distribution is not The light green color of the uniform band-like color is roughly observed like the inferior jade by the naked eye.
Guicui, also known as Guizhou Jade, is produced in Dachang Town, Qinglong County, Buyi and Miao Autonomous Prefecture, southwest Guizhou Province. The stone is a fine-grained quartzite containing green kaolinite. Mostly pale green, uneven color, with glass luster, the appearance is similar to jade, but not pure, more impurities, is a low-grade jade. Guicui is named after it is produced in Guizhou and can be used to make jewelry.
Guicui is mainly composed of quartz, followed by kaolinite, which is symbiotic with Yankuang. It contains about 87% of SiO2, about 6.0% of Al2O3, a small amount of Fe2O3, Cr2O3, TiO2, Na2O, K2O, Sb and the like. There are sky blue, emerald green, light green, gray yellow, red and other colors, with sky blue and emerald green as the best. The glass is shiny and slightly transparent. It has a granitic crystal structure, an inclusion structure, and a block structure. The hardness is about 7 degrees, the density is near 2.65-2.70 g/cm3, and the disassembly rate is 1.54-1.55. In the Dachang area of ​​Qinglong County, the area of ​​Guicui is about 60 square kilometers. The ore-bearing strata are located above the Lower Permian Maokou limestone and the Upper Permian Emeishan basalt;
Produced in Guizhou, hence the name. Also known as Guizhou jade. The color is light green, with glass luster, but not pure and impurities, like inferior jade, is a low-grade jade.
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