mineral

Rough ruby-bearing corundum (identification uncertain)

Corundum (Al₂O₃), possibly ruby; the image alone cannot confirm ruby or distinguish it from other red-purple minerals.

AI-generated identification · may be incorrect

Appears opaque and rough, with red-purple areas and gray/yellow matrix. Corundum has Mohs hardness 9, a trigonal crystal structure, and no true cleavage; luster is vitreous to dull when unpolished.

Identified September 29, 2026More mineral →

Explore Rough ruby-bearing corundum (identification uncertain) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

At a glance

Common name: Rough ruby-bearing corundum (identification uncertain)
Scientific name: Corundum (Al₂O₃), possibly ruby; the image alone cannot confirm ruby or distinguish it from other red-purple minerals.
Category: mineral
Identified: September 29, 2026
Method: Standard

AI Estimated Value

Approximately $1–$30 as an unverified rough specimen; confirmed gem-quality material can be worth far more.

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

Appears opaque and rough, with red-purple areas and gray/yellow matrix. Corundum has Mohs hardness 9, a trigonal crystal structure, and no true cleavage; luster is vitreous to dull when unpolished.

Formation & geological history

Corundum forms in aluminum-rich, silica-poor metamorphic rocks and some igneous settings; age depends on the deposit. The specimen may be corundum-bearing host rock, but its origin is not determinable from the photo.

Uses & applications

Gem-quality ruby is used in jewelry; industrial corundum is an abrasive and refractory material. This rough piece has no obvious gem value from the image.

Geological facts

Ruby is the red variety of corundum, with color chiefly caused by chromium. Color alone is not sufficient to identify it.

Field identification & locations

Check hardness, crystal habit, and mineral composition; reliable identification usually requires testing or laboratory analysis. Rubies occur notably in Myanmar, Mozambique, Madagascar, and Sri Lanka.