green·stone (gr n st n )n. Any of various altered basic igneous rocks colored green by chlorite, hornblende, or epidote. |
greenstone [ˈgriːnˌstəʊn]
n
1. (Earth Sciences / Geological Science) any basic igneous rock that is dark green because of the presence of chlorite, actinolite, or epidote
2. (Earth Sciences / Minerals) a variety of jade used in New Zealand for ornaments and tools
| greenstone (grnstn) Any of various green metamorphic rocks formed from igneous rocks that have a relatively low silica content and owe their color to the presence of a green mineral such as chlorite, hornblende, or epidote. |
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