metamorphic
Green schist (probable)
Chlorite–mica schist; exact mineral assemblage cannot be confirmed from the image
AI-generated identification · may be incorrectGreen-gray, visibly foliated and sparkly, with a flaky texture typical of aligned mica and chlorite. Typical constituent minerals have Mohs hardness around 2–4; schist has no single hardness, crystal structure, or specific gravity.
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Physical properties
Green-gray, visibly foliated and sparkly, with a flaky texture typical of aligned mica and chlorite. Typical constituent minerals have Mohs hardness around 2–4; schist has no single hardness, crystal structure, or specific gravity.
Formation & geological history
Formed when clay-rich or volcanic rocks were buried and metamorphosed under heat and pressure; age depends on its source locality and cannot be determined visually.
Uses & applications
Used as decorative or landscaping stone and collected as a hand specimen; mica-rich varieties may have limited ornamental uses.
Geological facts
Schistosity is the rock’s conspicuous layering or alignment of platy minerals, which can make it split along foliation.
Field identification & locations
Look for glittering flakes and wavy or parallel foliation; chlorite commonly gives schist a green tint. Similar rocks occur in metamorphic belts worldwide, but identification and locality need closer examination.
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