Hetian jade is the name of nephrite. The types of jade contained in it include: white jade, sapphire, jasper, topaz, ink jade, sugar jade, etc. Hetian jade of different colors has its own unique name. Among them, sapphire is well known because of its unique quality. However, many people like Heijing, such as black sapphire, are not very familiar with this quality. Today, I will introduce the black sapphire.
As the name suggests, the black sapphire is like a dark night. The jade has a strong black color. However, when the jade is exposed to the sun, it is found that the edges are cyan, and the black sapphire is named after it. It is a special variety of Hetian jade, not a branch of black jasper and ink jade.
So how is the color of black sapphire formed? In fact, the formation of black sapphire is due to the iron element, but the reason for its formation will be different because of different origins.
Xinjiang Hetian black sapphire seed material, its color is cyan, deep black and black, the texture is fine, the content of the internal anode stone is very low, so the light transmission is not very good, the light will be found when the same flashlight is irradiated with jade. Less than 5 mm. Qinghai jade also has black sapphire mountain material, the texture is not uniform, but the light transmission is slightly better, the color is blue-green.
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