和田玉的矿物组成以透闪石为主,并含有蛇纹石、石墨、磁铁等微量矿物质,形成白色、青绿色、黑色、黄色等不同色泽。多数为单色玉,少数有杂色。玉质为半透明,抛光后呈脂状光泽,硬度为5.5度至6.4度。和田玉的经济价值评定依据是颜色与质地纯净度,其主要品种有:白玉,含闪透石95%以上,颜色洁白、质地纯净、细腻、光泽莹润,为和田玉中的优良品种; Hetian jade mineral composition to tremolite-based, and contains trace serpentine, graphite, magnet and other trace minerals, the formation of white, turquoise, black, yellow and other different colors. The majority of monochrome jade, a few have mottled. Jade is translucent, glossy after polishing, hardness of 5.5 degrees to 6.4 degrees. Hetian jade is based on the economic value of the color and texture of the purity, the main varieties are: white jade, with more than 95% flash stone, white color, texture pure, delicate, shiny Yingrun, Hetian jade in fine varieties;