metamorphic
Greenstone
Metabasalt
AI-generated identification · may be incorrectMohs hardness of 5 to 6, typically pale to dark green in color due to chlorite and epidote, dull to sub-with luster, and a fine-grained, massive crystal structure.
Identified More metamorphic →
Explore Greenstone in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness of 5 to 6, typically pale to dark green in color due to chlorite and epidote, dull to sub-with luster, and a fine-grained, massive crystal structure.
Formation & geological history
Formed through low-grade regional metamorphism of mafic igneous rocks like basalt, typically occurring in ancient greenstone belts.
Uses & applications
Used primarily as crushed stone for road aggregate, construction fill, and occasionally as a decorative landscaping stone.
Geological facts
Greenstone belts represent some of the oldest surviving geological formations on Earth, dating back over 3 billion years.
Field identification & locations
Identify in the field by its distinct greenish tint and fine-grained texture; commonly found in Precambrian shields worldwide.
More like this
