metamorphic

Raw garnet-rich metamorphic rock

Likely garnet-bearing schist or garnetite; garnet-group silicates, commonly almandine (Fe₃Al₂Si₃O₁₂)

AI-generated identification · may be incorrect

Dark reddish-brown, translucent to opaque, with glassy-to-resinous luster and irregular fracture; likely Mohs 6.5–7.5 for garnet, with rough schistose matrix. Crystals appear poorly defined, so exact identification requires testing.

Identified September 6, 2026More metamorphic →

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At a glance

Common name: Raw garnet-rich metamorphic rock
Scientific name: Likely garnet-bearing schist or garnetite; garnet-group silicates, commonly almandine (Fe₃Al₂Si₃O₁₂)
Category: metamorphic
Identified: September 6, 2026
Method: Standard

AI Estimated Value

About $10–$50 for a common rough specimen; $50–$200 or more if it contains large, well-formed translucent garnet crystals.

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

Formed when aluminum- and iron-rich sedimentary or igneous rock underwent regional metamorphism, commonly during mountain building; age cannot be determined from the image. Typical host rocks formed over millions of years at moderate-to-high pressure and temperature.

Uses & applications

Used as an abrasive, water-filtration medium, and occasional gemstone material; garnet-bearing rock is mainly a collector specimen rather than a construction stone.

Geological facts

Garnet is an isometric mineral group with no cleavage and commonly conchoidal or uneven fracture. Almandine-rich garnets are especially common in metamorphic schists and gneisses.

Field identification & locations

Look for hard, rounded red-brown grains that resist scratching glass, lack cleavage, and may occur with mica or quartz; common localities include metamorphic belts worldwide, notably India, Sri Lanka, Madagascar, and the Alps. A streak, hardness test, and close examination of crystal faces would confirm it.