Turquoise is a kind of self-colored gem, which is completely hydrated copper and aluminum phosphate. The transparency of turquoise is opaque, and the lower part of the sheet is translucent. The polished surface is greasy glass luster, and the fracture surface is greasy dark luster. The types of turquoise are Persian turquoise, American turquoise, Mexican turquoise, Egyptian turquoise and wire turquoise. Turquoise, also known as turquoise, turquoise, wood fossil, wood stone, Shenmu stone, dragon stone, anti-allergic stone, emerald or turquoise.