Nephrite, in a narrow sense, refers to Hotan Jade, and in a broad sense, includes more than ten kinds of nephrite, such as Xiuyan Jade, Nanyang Jade, Jiuquan Jade, etc. 2、 Hard jade refers to jadeite. Jade is a dense block like aggregate formed by the interweaving of numerous small fibrous mineral microcrystals, mainly composed of hard jade.
