Black sapphire belongs to Hetian jade jade, which is a deep-colored sapphire. Generally, the black sapphire in Ta County, Xinjiang has the most collectible value. The price of high-quality black sapphire is about 3000-6000 yuan, and its price is also in jade quality, color, oiliness, origin and so on.
Xinjiang Hetian black sapphire, deep blue color and its light transmission performance is very good, the black sapphire produced here is extremely dense, and the jade is extremely delicate. The black sapphire produced here is very collectible.
Under natural light, black cyan generally has no black spots, and its appearance looks black. Black sapphire is caused by the immersion of graphite elements in the sapphire matrix. Black sapphire should be yellow-green light, and Hetian black sapphire looks green in the black under natural sunlight. When it is cloudy or when the light is bad, it looks black, and basically does not see pan-green. If it is very dark black, the edge is usually light, if it is not light, it is a stone.
Most of the black sapphire is Qinghai material from Golmud, commonly known as Qinghai jasper. It is divided into fine materials and fine materials. Fine materials are also very expensive, good at around 2000, but ordinary ones in two hundred, dozens of kilograms also. There are hundreds of kilograms of black and green, and there are tens of thousands of kilograms, mainly depending on the texture and origin.
Xinjiang Tashkur produces black sapphire mountain material and seed material. The black sapphire here is the most delicate and the density is very good. However, due to the high content of erectite, the light transmission is not good. The glare flashlight is attached, and the light transmission is only 5 mm. the following. But this kind of black and green is fine and has no structure. In the black sapphire, this is the most collectible value.
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