What is jadeite, the origin of Chinese jadeite is in Manasi, on the north slope of Tianshan Mountain in Xinjiang. When the use of Manasi jadeite started is unknown, but it is certain that it was extensively mined in the early Qing Dynasty. The royal family sent officials to establish a green jade factory, and thus jadeite became an important type of jade used in the Qing court. In terms of mineral composition, jadeite is a kind of nephrite, with tremolite containing actinolite as its main mineral, belonging to the amphibole group, close to the actinolite end member in the series of isomorphous substitution between tremolite and actinolite. The formation of jadeite is related to the intrusion of magnesian marble and ultrabasic rocks, which fundamentally differs from the genesis of other nephrite varieties. Other nephrite varieties...