greenstone

[ green-stohn ]

/ ˈgrinˌstoʊn /

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noun

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

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Origin of greenstone

First recorded in 1765–75; green + stone

Words nearby greenstone

greensome, Greenspan, Green Stamp, Green's theorem, greenstick fracture, greenstone, green strength, greenstrip, green stuff, green sulfur bacteria, greensward

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use greenstone in a sentence

“Bud tender” Allie Greenstone (her real name) answers the door.
Getting a Mile High: Legally Stoned in Colorado After Initiative 64|Winston Ross|January 19, 2013|DAILY BEAST
Indistinct specimens of greenstone, with adhering quartz; apparently a primitive rock.
Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]|Phillip Parker King
It is found in connection with isolated blocks of amygdaloid, of primitive greenstone, and of petrosilex.
Summary Narrative of an Exploratory Expedition to the Sources of the Mississippi River, in 1820|Henry Rowe Schoolcraft
Greenstone or diorite is usually a dull greenish rock, sometimes gray, however, speckled with green.
Geology|James Geikie

Greenstone is an excellent rock, and has a fine surface, but it is unmanageable.
The Poetry of Architecture|John Ruskin
The gold exists in spangles and in grains, disseminated among fragments of greenstone and porphyry.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.