metamorphic

Greenschist

Chlorite schist

AI-generated identification · may be incorrect

Hardness: 2-3 (Mohs scale); Color: green to dark green; Luster: vitreous to pearly; Crystal structure: monoclinic; Cleavage: perfect in one direction; Specific gravity: 2.6-3.0.

Hardness: 2-3 (Mohs scale)
Color: green to dark green
Luster: vitreous to pearly

Identified July 14, 2026More metamorphic →

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Physical properties

Hardness: 2-3 (Mohs scale); Color: green to dark green; Luster: vitreous to pearly; Crystal structure: monoclinic; Cleavage: perfect in one direction; Specific gravity: 2.6-3.0.

Formation & geological history

Formed through low-grade metamorphism of mafic igneous rocks like basalt or gabbro under relatively low temperature and pressure conditions (greenschist facies).

Uses & applications

Used primarily as decorative stone, in garden landscaping, and occasionally as a minor source of industrial minerals.

Geological facts

The characteristic green color is due to the presence of minerals like chlorite, epidote, and actinolite. It marks a specific zone of metamorphic intensity known as the greenschist facies.

Field identification & locations

Identify in the field by its distinct green color, foliated (layered) texture, and soft, flaky feel when scratched. Common in mountain belts like the Appalachians or the Alps.