metamorphic

Likely chlorite schist

Chlorite-rich schist; commonly composed of chlorite, quartz, and mica

AI-generated identification · may be incorrect

Greenish-gray, foliated pieces with a flaky or sparkly surface. Chlorite has Mohs hardness 2–2.5; quartz, if present, is 7. Exact composition and properties require testing.

Identified October 13, 2026More metamorphic →

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Physical properties

Greenish-gray, foliated pieces with a flaky or sparkly surface. Chlorite has Mohs hardness 2–2.5; quartz, if present, is 7. Exact composition and properties require testing.

Formation & geological history

Forms when low- to medium-grade metamorphism alters clay-rich sedimentary rocks or volcanic rocks. Such metamorphism has occurred across many geological ages and tectonic settings.

Uses & applications

Mostly a teaching, collecting, or decorative specimen; some schists are used locally as building or landscaping stone.

Geological facts

Schistosity is the visible alignment of platy minerals under heat and pressure. The image suggests a chlorite-rich rock, but visual identification alone is not definitive.

Field identification & locations

Look for green color and aligned, platy grains that split along foliation; a hand lens and hardness tests can help distinguish chlorite from mica-rich schist. Found in metamorphic belts worldwide.