gemstone

Gemstone ring with dark blue cabochons

Likely blue sapphire (corundum, Al₂O₃); the stones cannot be identified confidently from the image

AI-generated identification · may be incorrect

Small, polished, dark blue-to-black cabochons set in gold-colored metal. If sapphire, hardness is 9 Mohs, with a trigonal crystal structure and vitreous luster; the image does not reveal diagnostic properties or confirm the stone identity.

Identified September 26, 2026More gemstone →

Explore Gemstone ring with dark blue cabochons 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: Gemstone ring with dark blue cabochons
Scientific name: Likely blue sapphire (corundum, Al₂O₃); the stones cannot be identified confidently from the image
Category: gemstone
Identified: September 26, 2026
Method: Standard

AI Estimated Value

Approximately $20–$300 for costume or lower-value jewelry; substantially more if the stones and precious-metal setting are verified as valuable.

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

The ring is a human-crafted jewelry setting containing cut geological material. Natural sapphire forms in metamorphic rocks or igneous-related deposits over geologic time; the stones’ origin and age cannot be determined visually.

Uses & applications

Primarily jewelry and adornment; sapphire is also used in watches and specialized industrial components.

Geological facts

Dark appearance may result from lighting, stone color, or treatment; visual inspection alone cannot establish whether these are sapphire or another material.

Field identification & locations

A jeweler or gemologist can identify the stones using magnification and gemological tests. The ring’s appearance alone is insufficient to assess authenticity or value.