泰山玉的外观特征及分类分级研究

泰山玉的主要矿物成分为蛇纹石，另外有少量的磁铁矿、绿泥石等，因其所含矿物及其含量的不同，产生了不同的外观特征。泰山玉的颜色主要有绿色、黑色、褐色和花色4个系列，根据玉石颜色结合市场上普遍认可的分类名称，将泰山玉划分为4类，即泰山碧玉、泰山墨玉、泰山紫檀玉和泰山花斑玉。从颜色、质地、透明度、光泽、净度、块度几方面对泰山玉进行了质量评价，并将每一玉石类型划分了3个质量等级。

Study on Appearance and Classification of Taishan Jade

The color of Taishan jade are mainly green, black, brown, and flower color. According to the color of jade, combing with specific names generally accepted by the market, Taishan jade can be divided into 4 types, namely Taishan jasper, Taishan jade, Taishan cappuccino and Taishan Huabanyu. In this paper, quality evaluation of Taishan jade has been carried out from colour, texture, transparency, luster, clarity and block degree, and every jade type has been divided into three quality grades.