2. xiuyan jade is one of the four famous jades in the history of China (the third is lantian jade in Shaanxi, Hetian Jade in Xinjiang and dushan jade in Henan), and it is named after it is produced in Xiuyan, Liaoning. The earliest jade name can be found in Erya in the Western Han Dynasty: "Those who are beautiful in the East have doctors but no doctors." Xiuyan jade can be roughly divided into two types: one is old jade, and the seed material in old jade is called Hemo jade, which belongs to tremolite jade. Its simple and dignified texture, pale yellow and white color, is a precious original stone jade; The other is Xiuyan jasper, which is solid, moist, delicate and round, mostly green to lake green, among which dark green, transparent and few defects are treasures.

3, quality characteristics: tough texture, delicate and moist, bright luster.