Hetian jade's professional name is white jade or nephrite. Although it can be confirmed by the certificate alone, it is impossible to confirm whether it is really Hetian jade produced in Xinjiang. At present, the white jade produced in Russia is called Russian material, while Qinghai in China is called Qinghai material and Hetian jade in Xinjiang.

The price of white jade from different producing areas varies greatly. Generally, white jade from Qinghai, produced in Russia and China, is not very valuable. Only the white jade in Hotan, Xinjiang, which is white with sheep fat, is valuable.

You'd better take a picture. Data alone can't explain anything.