gemstone

Faceted red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium; identity cannot be confirmed from the image alone

AI-generated identification · may be incorrect

Deep red, transparent-to-translucent, faceted, vitreous luster; corundum has Mohs hardness 9 and a trigonal crystal structure, with no true cleavage. The dark center and bright reflections depend on cut and lighting; a synthetic or imitation stone is also possible.

Identified October 11, 2026More gemstone →

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At a glance

Common name: Faceted red gemstone, likely ruby
Scientific name: Corundum (Al₂O₃), colored red by chromium; identity cannot be confirmed from the image alone
Category: gemstone
Identified: October 11, 2026
Method: Standard

AI Estimated Value

Unverified small stones may be worth under $10 if imitation or synthetic; natural ruby values range widely, from tens to thousands of dollars or more depending on carat weight, treatment, clarity, and origin.

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

Natural ruby forms when aluminum-rich rocks crystallize under heat and pressure, commonly in metamorphic marble or basalt-related deposits. Ruby deposits span geological ages; the image cannot establish whether this stone is natural or its age.

Uses & applications

Used in jewelry and, owing to its hardness, specialized watch and industrial components; synthetic corundum is common in technical applications.

Geological facts

Ruby is the red variety of corundum; other colors of gem-quality corundum are called sapphire.

Field identification & locations

Check with a gemologist or laboratory for identity and natural-versus-synthetic status; visual inspection alone is insufficient. Natural rubies occur notably in Myanmar, Mozambique, Sri Lanka, Thailand, and Madagascar.