gemstone

Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)

Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.

AI-generated identification · may be incorrect

The domed, polished red stone is set in a silver-colored ring. Hardness, crystal structure, and specific gravity cannot be established from the photograph; ruby is Mohs 9, spinel 8, and glass is about 5–6.

Identified September 25, 2026More gemstone →

Explore Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed) 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: Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)
Scientific name: Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.
Category: gemstone
Identified: September 25, 2026
Method: Standard

AI Estimated Value

Not reliably estimable from the image: similar-looking rings may range from under $20 for imitation stones to hundreds or more for authenticated natural gems.

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

If natural ruby or spinel, the stone formed through geological crystallization or metamorphic processes; age and origin require gemological testing. The metal setting is human-made.

Uses & applications

Jewelry and collecting; ruby is valued for durable fine jewelry, while spinel is also used in jewelry.

Geological facts

Red color and cabochon cut are not enough to identify a gemstone, and synthetic ruby or colored glass can look similar.

Field identification & locations

Confirm with a gemologist using refractive-index and microscopic examination; check for bubbles, inclusions, and wear, but these clues are not conclusive. Natural ruby/spinel commonly occur in Myanmar, Sri Lanka, and other gem-producing regions.