gemstone

Dark green cabochon gemstone ring

Unknown; possibly green onyx (cryptocrystalline quartz, SiO₂) or another green gem

AI-generated identification · may be incorrect

The image shows a small, opaque-to-translucent dark green cabochon in a metal setting; the stone’s hardness, luster, and crystal structure cannot be confirmed from the photo. Green onyx is typically Mohs 6.5–7 with a vitreous to waxy luster.

Identified September 24, 2026More gemstone →

Explore Dark green cabochon gemstone ring in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

The ring setting is human-made; the stone’s identity and geological age are not determinable visually. If green onyx, it formed through silica deposition in cavities or fractures.

Uses & applications

Primarily jewelry and collecting; green onyx is also used for carvings and ornamental objects.

Geological facts

A polished cabochon has a smooth, domed surface rather than faceted faces, a cut chosen to display color and conceal inclusions.

Field identification & locations

The setting obscures the stone’s edges, so visual identification is uncertain; inspect under magnification and have it tested for hardness or refractive index. Green onyx is found in several regions, including Brazil, India, and Madagascar.