greenstone

[ green-stohn ]
/ ˈgrinˌstoʊn /

noun

any of various altered basaltic rocks having a dark-green color caused by the presence of chlorite, epidote, etc.

Origin of greenstone

First recorded in 1765–75; green + stone

Words nearby greenstone

greensickness, greenskeeper, greensome, greenspan, greenstick fracture, greenstone, greenstrip, greenstuff, greensward, greenth, greenville

Example sentences from the Web for greenstone

British Dictionary definitions for greenstone

greenstone
/ (ˈɡriːnˌstəʊn) /

noun

any basic igneous rock that is dark green because of the presence of chlorite, actinolite, or epidote
a variety of jade used in New Zealand for ornaments and tools

Scientific definitions for greenstone

greenstone
[ grēn′stōn′ ]

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.