metamorphic

Dark green schist (probable chlorite/actinolite schist)

Chlorite–actinolite schist; exact mineral identification requires testing

AI-generated identification · may be incorrect

Dark gray-green, rough and sparkly with a weak foliated texture. Likely Mohs 3–6 depending on minerals; chlorite has a pearly sheen and platy cleavage, while actinolite is commonly green and prismatic.

Identified October 13, 2026More metamorphic →

Explore Dark green schist (probable chlorite/actinolite schist) in the encyclopedia →

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Physical properties

Formation & geological history

Formed when mafic rocks or sediments were metamorphosed under heat and pressure, producing aligned platy or elongate minerals. Such rocks occur in metamorphic belts of varied ages; the specimen’s age cannot be determined from the image.

Uses & applications

Schist is used locally as building or landscaping stone; attractive pieces may be collected or cut for decorative use.

Geological facts

The visible green color and reflective flakes are consistent with chlorite- or amphibole-bearing rock, but appearance alone cannot confirm the minerals.

Field identification & locations

Look for green color, sparkly aligned grains, and foliation or splitting along mineral layers; common in regional metamorphic terrains. A hardness, streak, and mineral-analysis test would improve identification.