greenstone(redirected from Greenstone (disambiguation))
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Any of various altered basic igneous rocks colored green by chlorite, hornblende, or epidote.
1. (Geological Science) any basic igneous rock that is dark green because of the presence of chlorite, actinolite, or epidote
2. (Minerals) a variety of jade used in New Zealand for ornaments and tools
any of various altered basaltic rocks having a dark green color.