metamorphic

Likely blue-green schist

Chlorite–epidote schist (tentative visual identification)

AI-generated identification · may be incorrect

Fine- to medium-grained, pale blue-green with a sparkly, foliated surface; likely chlorite and epidote with quartz or feldspar. Typical hardness is about 2–7 depending on the minerals; photo alone cannot confirm cleavage, composition, or specific gravity.

Identified October 3, 2026More metamorphic →

Explore Likely blue-green schist in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed when mafic rock was metamorphosed under greenschist-facies conditions, commonly during regional mountain-building. Its precise age and locality cannot be determined from the image.

Uses & applications

Schist is mainly a geological and lapidary/collecting specimen; attractive pieces may be polished, while many schists are unsuitable for durable construction because they split along foliation.

Geological facts

The green color commonly comes from chlorite and epidote, minerals characteristic of low-grade metamorphism.

Field identification & locations

Look for visible aligned flakes or layers and a greenish cast; compare with a fresh surface and avoid identifying it by color alone. Green schists occur in metamorphic belts worldwide.