metamorphic
Greenstone
Metabasalt
AI-generated identification · may be incorrectMohs hardness of 5 to 6, dull green to dark greyish-green color, fine-grained texture, sub-conchoidal fracture.
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, dull green to dark greyish-green color, fine-grained texture, sub-conchoidal fracture.
Formation & geological history
Formed through low-grade regional metamorphism of mafic igneous rocks like basalt under high pressure and moderate temperatures.
Uses & applications
Used locally as crushed stone for construction, decorative landscaping, and historically for polished prehistoric stone axes and ornaments.
Geological facts
The characteristic green color comes from secondary minerals like chlorite, actinolite, and epidote formed during alteration.
Field identification & locations
Identify by its distinct mottled green hue and microcrystalline structure; commonly found in ancient shield areas and greenstone belts worldwide.
More like this
