Emerald, commonly known as "Emerald" in China, is a rising star in traditional jade in China, and also the top grade in all modern jade. Common jadeite colors are white, gray, pink, light brown, green, emerald green, yellow-green, purple and so on. Most of them are opaque, partly translucent and glassy. According to color and texture, there are more than 20 varieties, such as ruby green, brilliant green, yellow sun green, sunny green, glass green, Ying Ge green, spinach green, shallow water green, light sun green, frog green, melon skin green, plum blossom green, blue-green, gray green, oil green, violet, lotus root powder land and so on.
Nephrite is called real jade, such as white jade, sapphire, clear white jade, jasper, jet and so on. All have waxy luster, pure milky white. Judging from the jade articles of past dynasties, nephrite is the main jade used in China, and ancient nephrite is called traditional jade in China. The common colors of nephrite are white, gray, green, dark green, yellow and black. Most nephrite are opaque, and some nephrite are translucent and glassy. The varieties of nephrite are mainly divided according to different colors. The best white jade, as white as suet, is called suet jade. Sapphire is grayish white to bluish white. At present, some people call off-white sapphire sapphire. Jasper is green or dark green, and sometimes black spots can be seen, which is caused by impurities such as chrome spinel minerals. Containing many impurities, when it is black, it is a precious jet. Topaz is also a precious variety. Sapphire has a yellow shell with sugar water, which is called "sugar jade" by the existing people, "pink jade" by some people when the white is slightly pink, and "tiger jade" by some people when the tiger skin is colored.
As far as I know, the most valuable thing seems to be Xinjiang Hotan sheep fat jade.