Turquoise, like nephrite, is a traditional jade that is popular among people of all ages. The characteristics of its characteristic sky blue, opaque, porcelain-like or even earthy luster are easily recognized.
Turquoise in the Neolithic Age of China has been used as a decoration, dating back more than 6,000 years.
Turquoise is an aqueous copper aluminophosphate. Mostly sky blue, light blue, green blue, green, pale blue. White streaks and brown iron lines often appear. Turquoise texture is fine, hardness 4~6, dense and hard. The color is green, the quality is lowered, and the texture is rough and porous is inferior. Turquoise nature is unstable. Its color is easily stained and exposed to high temperatures and sun exposure. When it comes into contact with alcohol, soapy water, cosmetic oils and various acid and alkali solutions, it will fade and discolor. Human sweat penetrates into the turquoise pores and can also cause discoloration.
Turquoise is a medium and low grade jade, and there are artificial treatments and artifacts on the gemstone market. It is mostly dyed or processed by injecting wax or plastic into light colors. Use warming and ammonia soaking to find out if it is counterfeit.
Turquoise is mainly used to make necklaces and brooches or crafts.
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