Xiuyan jade is one of the four famous jade in the history of China (the third place 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 unsuccessful 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.
Xiuyan jade is rich in water, tough in texture, delicate and moist, bright in luster and rich in colors. It has six characteristics: large size, beautiful color, high brightness, pure purity, good density and sufficient hardness. It has been an ideal jade carving material since ancient times.
Color key
There are many colors in xiuyan jade. The basic colors can be divided into five kinds: green, yellow, white, black and gray, and each kind can be divided into many kinds according to the specific changes of colors from light to dark.
Green can be divided into: light green, light green, yellow-green, turquoise, dark green and dark green; Yellow can be divided into: light yellow, yellow, lemon yellow; White can be divided into: white, milky white, yellow white, gray; Black is commonly known as "jet" and can be divided into: gray-black and black; Gray, commonly known as "flint green", can be divided into: light gray, gray, blue gray, black gray; Mottled color: If it is a mixture of red, yellow, brown and other primary colors, it is "Huayu"; if it is white and green, it is "Cui Jia".
The existence of such rich colors often makes xiuyan jade have extremely beautiful "clever colors". The depth of color is related to the iron content. When there is iron, the color is generally dark, and vice versa. Jade also has a strong waxy luster, glass luster, and some show oily luster; Slightly transparent to translucent, a few transparent.
The above contents refer to Baidu Encyclopedia-Xiuyu.