gemstone

Ruby (faceted gemstone in a ring)

Corundum, Al₂O₃; red color typically from trace chromium

AI-generated identification · may be incorrect

Mohs hardness 9; vivid red to purplish-red, vitreous luster, trigonal crystal structure, no true cleavage. The photo shows a large cushion-cut stone; its natural or synthetic origin and treatments cannot be determined visually.

Identified September 29, 2026More gemstone →

Explore Ruby (faceted gemstone in a ring) 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: Ruby (faceted gemstone in a ring)
Scientific name: Corundum, Al₂O₃; red color typically from trace chromium
Category: gemstone
Identified: September 29, 2026
Method: Standard

AI Estimated Value

The ring’s value cannot be reliably estimated from the image; ruby prices range from under $100 for synthetic or low-grade stones to many thousands of dollars for fine natural gems, depending on size, quality, treatment, and provenance.

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

Ruby forms as corundum in metamorphic rocks or in some igneous deposits; geological ages vary widely. A gem may also be lab-grown, which cannot be ruled out from the image.

Uses & applications

Used in fine jewelry and collecting; corundum is also used as an abrasive and in specialized industrial applications.

Geological facts

Ruby and sapphire are varieties of the same mineral, corundum; red coloration distinguishes ruby.

Field identification & locations

Look for exceptional hardness and, in rough material, hexagonal crystals; common sources include Myanmar, Mozambique, Sri Lanka, Thailand, and Madagascar. Verify identity, treatment, and natural versus synthetic origin with gemological testing.