Hetian jade sugar jade is formed near the outer belt of white jade, sapphire and sapphire mountain material, which is mainly the product of weathering. There are different opinions on the reasons for the formation of sugar jade: some say it is primary, while others say it is formed by secondary action. In short, it is dyed by some substance to form reddish brown (black hemp). Because of its color like brown sugar, it is vividly called Tang Yu. The main part of sugar jade, which is what we usually call meat, is mainly white jade or sapphire (also yellow and white). Due to the different dyeing degree, the sugar color part is also different. The thickness of sugar color varies from a few millimeters to dozens of centimeters, usually attached to the surface of meat, and some are wrapped in meat color, showing a transitional relationship.