metamorphic

Weathered garnet-bearing rock (possibly garnet schist)

Garnet-bearing mica schist; likely almandine garnet (Fe₃Al₂(SiO₄)₃) with mica and quartz

AI-generated identification · may be incorrect

Brown-gray, rough and weathered, with reflective mica-like patches and possible garnet grains. Garnet is Mohs 6.5–7.5; quartz is 7 and mica is about 2–3. Exact mineral identification is uncertain from the image.

Identified September 30, 2026More metamorphic →

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At a glance

Common name: Weathered garnet-bearing rock (possibly garnet schist)
Scientific name: Garnet-bearing mica schist; likely almandine garnet (Fe₃Al₂(SiO₄)₃) with mica and quartz
Category: metamorphic
Identified: September 30, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small, common rough specimen; more if garnet crystals are clearly visible and attractive.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Likely formed when clay-rich sediment was metamorphosed by heat and pressure, producing mica and garnet; such rocks occur across a wide range of geological ages.

Uses & applications

Garnet is used as an abrasive and occasionally as a gemstone; schist is mainly a geological or collecting specimen rather than a construction stone.

Geological facts

Garnet crystals commonly grow within metamorphic rocks and can indicate the pressure-temperature conditions the rock experienced.

Field identification & locations

Look for distinct, hard, often reddish garnet crystals embedded in shiny, flaky mica; this specimen’s visible grains are not clear enough to confirm garnet. Garnet schist occurs in metamorphic belts worldwide, including the Appalachians, Scandinavia, and parts of India.