Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl6(PO4)4(OH)8·4H2O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.(from Wiki)
Composition: Phosphate minerals of copper and aluminum
Color: Light to medium blue, blue-green, green, yellow green, common black, yellow brown, white mesh or impurities
Transparency: Opaque to slightly transparent
Mohs hardness: 3-6
Specific gravity: 2.4-2.9
Refractive index: 1.61-1.65
Crystal system: triclinic crystal system
Optical characteristics: Heterogeneous aggregates, single crystals are biaxial crystals, with positive optical properties
Gloss: waxy luster, glassy luster, earthy luster
Composition: Phosphate minerals of copper and aluminum
Color: Light to medium blue, blue-green, green, yellow green, common black, yellow brown, white mesh or impurities
Transparency: Opaque to slightly transparent
Friction hardness: 3-6
Specific gravity: 2.4-2.9
Refractive index: 1.61-1.65
Crystal system: triclinic crystal system
Optical characteristics: Heterogeneous aggregates, single crystals are biaxial crystals, with positive optical properties
Gloss: waxy luster, glassy luster, earthy luster
Turquoise in China can be traced back to the Neolithic Age(about 10000 years ago-4000 years ago). In every dynasty since then, there have been many turquoise products. Turquoise is a traditional jade with a long history and rich resources.
Turquoise is also the birthstone of December, representing victory and success, and is known as the Stone of Success.
The countries that produce turquoise in the world mainly include Iran, the United States, China, and so on. China's turquoise is mainly concentrated at the border of Hubei, Henan, and Shaanxi Provinces.The most famous production area of turquoise in China is Zhushan and Yun County, Hubei Province.The Zhushan and Yun area in Hubei is known as the hometown of turquoise in China. The turquoise in these areas is of excellent quality and rich in color, and is deeply loved by gemstone enthusiasts. The abundant turquoise material is pure, with bright and dazzling colors, mostly sky blue, Dark blue, blue-green, green, blue-white, light yellow, white,etc.
In Chinese Tibetan(Xizang) culture, Tibetan compatriots believe that turquoise is the embodiment of gods, a symbol of power and status, and the most popular and fashionable sacred decoration. But please kindly be informed that in Tibet there is no turquoise mines. Almost all the turquoise come from our Hubei Province.
We are very proud to say our company located in Wuhan City, Capital of Hubei province. We produced and exported Chinese Hubei turquoise more than 30 yeas. Our company has invested in several work shops near the Zhushan(bamboo Mountain)county turquoise mines.
Any inquires would be warmly welcomed!