一种黑色普通角闪石玉的宝石学特征  

Gemmological Characteristics of Black Hornblende Jade

作　　者：罗跃平[1] 

机构地区：[1]国家首饰质量监督检验中心,北京100101

出　　处：《宝石和宝石学杂志》2007年第4期59-62,共4页Journal of Gems & Gemmology

摘　　要：传统意义上的墨玉是指黑色软玉,其颜色由内部石墨包裹体造成。软玉市场上常出现一种被称为"墨玉"的玉石,为黑色,有白色点状区域,折射率为1.63(点测),密度为3.09g/cm3,与软玉的折射率(1.61)和密度(3.00g/cm3)相近。通过研究该玉石发现,其黑色不是由于含有石墨造成,其主要成分为深绿色的普通角闪石。因此,该玉石不应称为墨玉,而应命名为普通角闪石玉或角闪石玉。Traditionally , “ink” jade is black nephrite, whose colour is cause as its inclusion. A kind of “black jade”is often encountered in market, w refractive index and density are almost close to that of the black nephrite. I “black jade”is studied, and it is found out that the main composition is blende, so the jade must not be named “ink” jade but hornblende jade. d by the graphite hose appearance, n this article, the dark green hornblende, so the jade must not be named “ink” jade but hornblende jade.

关 键 词：“墨玉” 普通角闪石 宝石学特征 

分 类 号：P619.28[天文地球—矿床学] TS93[天文地球—地质学]