Narrow Concept of Hetian Jade: The seed jade produced in the Yulong Karashar River and Kara Kash River in the Hetian region of Xinjiang, recognized by industry insiders and collectors; and the mountain material produced in the Kunlun Mountains around the Hetian region (currently, high-quality mountain material with better whiteness is very rare);
Broad Concept of Hetian Jade: (Authoritative appraisal institutions can all issue Hetian jade certificates) Nephrite jade, including the real Hetian jade produced in the Yulong Karashar River and Kara Kash River in Xinjiang; Russian nephrite jade; Qinghai Kunlun Mountain nephrite jade; Canadian jade nephrite, and other places that produce nephrite jade; because national standards can only be based on specific scientific evidence.