软玉是透闪石、阳起石矿物为主的矿物集合体。硬度6-6.5,折光率1.620(点测法),密度2.9-3.1g/cm~3,油脂光泽。是国际珠宝界认可的两大玉石之一。软玉质地细腻,光泽温润,耐久性好,在古代即被我国的文人雅士视为德的化身,有关“君子无故,玉不去身”的说法流传至今。世界软玉产地不少,唯有新疆和田县产的羊脂白玉中外驰名,其玉石雕件的价格可以与优质翡翠媲美。蛇纹石质玉是以蛇纹石矿物为主的玉石。硬度2.5-5.5,密度2.44-2.8g/cm~3,折光率1.55(点测法),蜡状光泽。因产地 Nephrite is tremolite, Yang stone mineral-based mineral aggregates. Hardness 6-6.5, refractive index 1.620 (point measurement), density 2.9-3.1g / cm ~ 3, oil luster. It is one of the two jade recognized by the international jewelery industry. Nephrite delicate texture, gloss, moist, durable, and in ancient times that is our country’s literati as the embodiment of Germany, the “gentleman for no reason, jade does not go to body,” the saying goes. The world a number of nephrite origin, only the Xinjiang Shetian production of suet white jade well-known, its jade carved pieces of the price can be comparable with the high-quality emerald. Serpentine jade is based on serpentine mineral jade. Hardness 2.5-5.5, density 2.44-2.8g / cm ~ 3, refractive index 1.55 (point measurement), waxy luster. Because of origin