gemstone

Red faceted gemstone, likely synthetic ruby

Corundum (Al₂O₃); ruby when red, possibly laboratory-grown

AI-generated identification · may be incorrect

Transparent, vivid red, vitreous luster, hexagonal crystal structure; Mohs hardness 9, specific gravity about 4.0. The precise identity cannot be confirmed from the image alone; a glass or other simulant is also possible.

Identified September 29, 2026More gemstone →

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At a glance

Common name: Red faceted gemstone, likely synthetic ruby
Scientific name: Corundum (Al₂O₃); ruby when red, possibly laboratory-grown
Category: gemstone
Identified: September 29, 2026
Method: Standard

AI Estimated Value

Not reliably estimable from the image; if synthetic corundum, roughly $10–$100, while natural rubies range from tens of dollars to many thousands depending on quality and treatments.

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 undergo metamorphism or crystallize in certain igneous settings; natural deposits range from ancient to geologically recent. Lab-grown corundum is produced by controlled crystal-growth methods.

Uses & applications

Used in jewelry and, for synthetic corundum, in watches, lasers, and durable industrial components.

Geological facts

Ruby and sapphire are both varieties of corundum; trace chromium gives ruby its red color.

Field identification & locations

Check hardness, inclusions, and optical properties; gemological testing is needed to distinguish natural ruby, synthetic ruby, and simulants. Natural rubies occur in Myanmar, Mozambique, Thailand, and elsewhere.