Hetian jade itself is not a geographical concept, not specifically the jade produced in the Hetian area of Xinjiang, but the name of a class of products. In China, more than 98% of the tremolite components are named Hetian jade, which can also be called nephrite, tremolite, tremolite, soft jade, tremolite and Hetian jade. These names are not illegal. , are within the scope of the national standard. Hetian jade is a kind of nephrite, commonly known as true jade. The jade in the narrow sense generally refers to Xinjiang Hetian jade. English name Nephrite. The chemical composition is an aqueous calcium magnesium silicate having the chemical formula Ca:Mgs(OH)z(Si4011)2. The hardness is 6 to 6.5 and the density is 2.96 - 3.17. Hetian jade and Shaanxi Lantian jade, Henan Nanyang jade, Liaoning Xiuyan jade are also known as China's four famous jade.
Hetian jade is a product of contact formation of medium-acid magma intrusive into magmatic marble and dolomite marble, and is an aqueous calcium magnesium silicate. It is distributed in the Kunlun Mountains, in the west from the Tashkurgan County in the east of the Kashgar region, the Angatatag and the Alashan Mountain, and in the east to the Golmud in Qinghai Province, stretching over 1,300 kilometers. In the administrative region of Xinjiang, it stretches over 1,100 kilometers. The predecessor of the "Silk Road" is the "Jade Road" with a history of more than 6,000 years.