metamorphic
Green schist
Chlorite–mica schist, likely containing quartz and feldspar
AI-generated identification · may be incorrectGreen-gray, visibly foliated and sparkly, with aligned flaky minerals and pale quartz-rich streaks. Likely Mohs hardness 2–3 for chlorite/mica and about 7 for quartz; exact composition cannot be confirmed from the image.
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Physical properties
Green-gray, visibly foliated and sparkly, with aligned flaky minerals and pale quartz-rich streaks. Likely Mohs hardness 2–3 for chlorite/mica and about 7 for quartz; exact composition cannot be confirmed from the image.
Formation & geological history
Formed when clay-rich or volcanic rocks were metamorphosed under heat and pressure, aligning chlorite and mica into foliation. Its age and precise formation conditions cannot be determined visually.
Uses & applications
Used locally as decorative or landscaping stone and collected as a field specimen; some schists are cut for ornamental slabs.
Geological facts
The green color commonly comes from chlorite or other iron- and magnesium-rich minerals; schistosity develops as platy minerals align during metamorphism.
Field identification & locations
Look for a flaky, glittering surface and layered fabric that splits along mineral alignment; green schist occurs in metamorphic belts worldwide. Confirming the identification requires closer examination or mineral testing.
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