What are the points to be selected for Hetian jade:
I. Eye color method
The color of Hetian jade is based on white and cyan, and the color tone is relatively uniform. White white jade, especially sheep fat white jade, is unique to Hetian jade. Daiyu and Nanyang jade also have white, but there is no Hetian jade color, and some also have green and other impurities. The blue sapphire is sometimes confused with the green jasper and jade, etc. It is necessary to grasp the characteristics of cyan, which is between blue and green. Hetian jade jade has a leather color, and the leather color tone is mostly brown, limited to local.
2. Analytical texture method
Hetian jade texture is dense and delicate, moist and soft, with oily luster, giving people a sense of softness, white jade is especially obvious. Other jade also has a fine texture, but the moisture and grease luster are not as good as Hetian jade.
Three test impurity method
Hetian jade is pure and has few impurities. Impurities are commonly found in iron and graphite. The impurities are mostly distributed at the cracks and are brown or brownish black, which is discernible to the naked eye. Graphite is black and distributed in the ink jade.
Four judgment hardness method
Hetian jade hardness is 6.5-6.9, with steel knife can not be imprinted, jade with similar hardness has jade, Nanyang jade, chalcedony and so on. The jadeite hardness is 6.5-7.0, the Nanyang jade hardness is 6.0-7.5, and the chalcedony is 6.5-7, which can be distinguished by other features. In the visual identification, the above characteristics should be considered comprehensively. It is not only necessary to look at one point. It is best to compare it with Hetian jade specimens repeatedly. The experience of visual identification in Hetian jade's identification method is critical, so it should be identified by jade experts as much as possible.
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