greenstone

[ green-stohn ]

noun

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

greenstone

/ ˈɡriːnˌstəʊn /

noun

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

greenstone

/ grēn′stōn′ /

1. 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.

Word History and Origins

Origin of greenstone¹

First recorded in 1765–75; green + stone

Example Sentences

“Bud tender” Allie Greenstone (her real name) answers the door.

From The Daily Beast

Indistinct specimens of greenstone, with adhering quartz; apparently a primitive rock.

From Project Gutenberg

It is found in connection with isolated blocks of amygdaloid, of primitive greenstone, and of petrosilex.

From Project Gutenberg

Greenstone or diorite is usually a dull greenish rock, sometimes gray, however, speckled with green.

From Project Gutenberg

Greenstone is an excellent rock, and has a fine surface, but it is unmanageable.

From Project Gutenberg

The gold exists in spangles and in grains, disseminated among fragments of greenstone and porphyry.

From Project Gutenberg