gemstone

Likely diamond accent

Diamond (crystalline carbon, C)

AI-generated identification · may be incorrect

Small faceted, colorless-to-nearly-colorless stone with adamantine luster; Mohs hardness 10, cubic crystal structure, excellent thermal conductivity, and no visible cleavage in the image. Identification is provisional because the specimen is tiny and mounted/handled with jewelry.

Identified August 11, 2026More gemstone →

Explore Likely diamond accent 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

Natural diamonds crystallize deep in Earth’s mantle under extreme pressure and temperature, commonly older than 1 billion years, then reach the surface in kimberlite or lamproite. Laboratory-grown diamond has the same composition but a modern synthetic origin.

Uses & applications

Used in jewelry and, because of exceptional hardness, cutting, drilling, abrasives, and precision tools. Value depends strongly on carat weight, cut, color, clarity, and whether it is natural or laboratory-grown.

Geological facts

A diamond should show strong fire and brilliance when well cut; cubic zirconia and moissanite can look similar. A loupe, refractive/thermal testing, and gemological certification are needed for reliable identification.

Field identification & locations

Likely set in a ring or jewelry component; inspect facet sharpness, inclusions, and mounting, but avoid scratch tests. Common natural sources include Botswana, Russia, Canada, Australia, and southern Africa.