普通角闪石多呈黑色、暗绿色，有时为褐色。

Hornblende is black, dark green, sometimes brown.

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普通角闪石是闪长岩、正长岩中常出现的矿物，也常出现在花岗岩中。

Hornblende is often diorite, syenite in minerals, often appear in granite.

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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。

In this article, the "black jade" is studied, and it is found out that the main composition is dark green hornblende, so the jade must not be named "ink" jade but hornblende jade.

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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。

In this article, the "black jade" is studied, and it is found out that the main composition is dark green hornblende, so the jade must not be named "ink" jade but hornblende jade.

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