metamorphic

Likely garnet-bearing rock (possibly almandine garnet in dark matrix)

Garnet, probably almandine (Fe₃Al₂(SiO₄)₃); host rock is not identifiable from this image

AI-generated identification · may be incorrect

The specimen appears dark, irregular, and mottled reddish-brown, but the photo is too blurred to confirm crystals or distinguish garnet from iron staining. Garnet has Mohs hardness 6.5–7.5, typically vitreous luster, and no cleavage; its crystal system varies by species.

Identified September 30, 2026More metamorphic →

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At a glance

Common name: Likely garnet-bearing rock (possibly almandine garnet in dark matrix)
Scientific name: Garnet, probably almandine (Fe₃Al₂(SiO₄)₃); host rock is not identifiable from this image
Category: metamorphic
Identified: September 30, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common rough fragment; substantially more only if confirmed garnet crystals are attractive or gem quality.

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

Garnets commonly crystallize during metamorphism of aluminum-rich rocks, often in schist or gneiss. Their ages vary widely; no age or host-rock type can be determined visually here.

Uses & applications

Garnet is used as an abrasive and, when transparent and well-formed, as a gemstone. A rough specimen like this is mainly of collecting interest.

Geological facts

Garnet is a mineral group rather than a single mineral; red almandine is among its most common varieties.

Field identification & locations

The reported location is in the Pacific Northwest, where metamorphic rocks and garnet occurrences are plausible, but this image does not establish the identification. Check for discrete glassy red grains and test hardness; a close-up in daylight and a fresh surface would help distinguish garnet from iron-stained rock.