metamorphic

Likely slate fragments

Slate, a fine-grained metamorphic rock composed chiefly of quartz, mica, and chlorite

AI-generated identification · may be incorrect

The angular pieces appear dull, gray-blue, and fine-grained, with flat surfaces suggestive of slaty cleavage. Slate is typically about 3–4 on the Mohs scale; the image alone cannot confirm composition or hardness.

Identified September 24, 2026More metamorphic →

Explore Likely slate fragments 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

Slate forms when shale or mudstone is subjected to low-grade metamorphism, producing aligned minerals and cleavage. It commonly forms in ancient convergent-margin mountain belts; the specimen’s age and source cannot be determined from the image.

Uses & applications

Slate is used for roofing, paving, flooring, blackboards, and decorative stone; these small fragments are mainly suitable for collecting or craft use.

Geological facts

Its characteristic tendency to split into thin, flat sheets reflects metamorphic foliation rather than sedimentary layering.

Field identification & locations

Look for very fine grain and planar cleavage that yields thin sheets; common sources include metamorphic belts worldwide. The image supports a slate-like identification, but close inspection or testing would be needed to rule out another dark, fine-grained stone.