玉石新品种——绿帘石透闪石玉

A New Species of Jade——Epidote-Tremolite Jade

绿帘石透闪石玉是市场上发现的一新品种,主体呈特征的黑绿色和黄绿色,商家称其为"青花玉"。采用薄片观察、电子探针、红外光谱等测试手段,对其样品的矿物学、宝石学、谱学特征进行了研究。结果显示,其主要矿物组成为透闪石和绿帘石,含有少量的石英、方解石、绿泥石、褐铁矿和榍石等,因此,将其定名为"青花玉"不恰当,建议定名为"绿帘石透闪石玉"。其结构致密,硬度高,是一种较好的玉石材料,以特征的颜色和结构易与其它玉石相区分。

Epidote-tremolite jade called ＂Qinghua jade＂by sellers is a new species in the market, and its main colour is blackish green or yellowish green. The mineralogical,gemmological and spectral characteristics of this kind of jade is studied by using the slice observation, electron microprobe and infrared spectrum. The results indicate that the main mineral components of the jade are epidote and tremolite,and the auxiliary mineral components are quartz, calcite, chlorite, limonite and sphene. So＂Qinghua jade＂ is not the appropriate name for the jade and it is suggested that it should be named ＂epidote-tremolite jade＂, which is a kind of good jade material because of its compact structure and high hardness and could be easily distinguished from the other jades through the distinct features of the colour and structure.