Hetian jade color classification

Hetian jade, "The price of skin is particularly high. The skin has sprinkling gold, autumn pears, chicken blood and other names, Gai Yu's bandits who, often a few hundred gold, the pickers do not get jade, but the treasure depot." It can be seen that Daiyu is still very expensive even in modern times. The outer layer of the jade can be divided into three types: skin, sugar, and stone, depending on its composition and appearance.

Color skin: A layer of brownish-red or brownish-yellow jade skin that is distributed on the surface of Jade Jade. As mentioned above, there are various colors of jade skin. The jade industry is named in various colors, such as black leather, deerskin and so on. From the skin color can be seen the quality of jade, such as black leather, deerskin, etc., mostly white fine material. Jade jade of the same quality, such as skin color with autumn pears, is of higher value. The thickness of jade skin is very thin, generally less than 1 mm. There are various forms of skin, some are cloud-shaped, some are veins, and some are scattered. The formation of color skin is due to the fact that ferrous oxide in Hetian Yuzhong is converted to iron trioxide under oxidative conditions, so it is secondary. Experienced jade pickers will go to the middle and lower reaches to find jade seeds with color skin; while upstream, there will be few opportunities to find colored jade seeds. In addition, Neneng occasionally discovered skin-like mountains near the cracks of the original jade ore body, which was also formed due to secondary oxidation.

Sugar husk: refers to the outer layer of Hetian Yushan material distributed a layer of yellow-brown jade skin, because the color is like brown sugar, so the sugar jade skin is called sugar jade. The interior of sugar jade is sapphire or white jade. The sugar rind has a relatively large thickness, ranging from several centimeters to 20--30 centimeters. It is often surrounded by white jade or sapphire and is in a transitional relationship. Sugar and jade are produced near crevices in the ore body. A study was conducted on the sugar husk of sugar jade in the jadeite mine of Tateluksu, Qiemo county, which was caused by the oxidation of Hetian jade. Then observed under a polarizing microscope, the glycoside was composed of tremolite crystallites, showing a braided and intertwined fiber structure. Under a single polarized light, light brownish brown iron was seen in a cloud-like distribution in tremolite.

Stone skin: Refers to the surrounding rock surrounded by Hetian Yushan material. A type of surrounding rock is a translucent and petrified Baiyun marble rock, which is mined with jade and then attached to the surface of jade. The stone and jade of this stone bag jade have clear boundaries and can be separated. When he was washed and transported by running water or glaciers for a long time, stone and jade were separated. The other type of rock is tremolite. Such as Hetian jade re-formation process in the process of coarse-grained tremolite, due to incomplete account, in the jade surface often accompanied by coarse crystal tremolite, this stone and jade boundary transition. The arts and crafts industry calls the yin and yang face of jade. The reason why Hetian jade and jade is precious is because color skin can be used as a pretty color jade; second, because the quality of jade is very good. The production of Qiao color jadeware has a long history in China. Until now, it has also used color hues to make various jade articles to make it even more interesting. Some antiques are more common, such as antique jade cups and antique jade bergamots that use antique autumn pears and tiger skins to display antiques.