metamorphic
Greenstone
Metabasalt
AI-generated identification · may be incorrectHardness of 5-6 on the Mohs scale, typically grayish-green to dark green, dull to sub-waxy luster, and massive or microcrystalline crystal structure.
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Physical properties
Hardness of 5-6 on the Mohs scale, typically grayish-green to dark green, dull to sub-waxy luster, and massive or microcrystalline crystal structure.
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 for landscaping, decorative stone, and historically for making prehistoric stone axes and weapons.
Geological facts
The green color is primarily imparted by secondary metamorphic minerals such as chlorite, actinolite, and epidote.
Field identification & locations
Identify by its dense, smooth texture and distinctive green coloration, commonly found in ancient shield areas and orogenic belts.
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