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What grade does the cryptocrystalline texture of turquoise belong to?
The aphanitic belongs to the middle class.

Cryptocrystalline texture is a structure in which mineral particles can only be distinguished under a microscope. It belongs to hypabyssal rocks and extrusive rocks, and belongs to a fully crystalline structure. Turquoise with this structure is fine and uniform in texture, bright and diverse in color, moderate in hardness and good in wear resistance, so it is widely used in jewelry, handicrafts and other fields, and belongs to the middle range.