Roughly divided into three categories. One type is old jade: the seed material in old jade is called Hemo jade, which belongs to tremolite jade. Its texture is simple, dignified, and its color is light yellow and white. It is a precious jade. Good old jade can be comparable to Hetian jade. The other type is Xiuyan jasper, which belongs to the serpentine type ore. Its texture is solid and warm, delicate and round, and mostly green to lake green. Among them, dark green, transparent and with few flaws are the treasures. However, due to its large output, it appears Not so precious. There is also a kind of Jia Cui, which is a mixture of serpentine jade and tremolite jade. According to the color, it can be divided into dark green, green, light green, yellow-green, gray-green, yellow-brown, tan, dark red, sallow, white, yellow-white, green-white, gray-white, black and other colors.