gemstone

Colorless faceted gemstone, likely diamond

Diamond; crystalline carbon (C)

AI-generated identification · may be incorrect

Hardness 10 Mohs; colorless, exceptionally brilliant adamantine luster, cubic crystal structure, no cleavage in the usual sense but perfect octahedral cleavage. The image alone cannot confirm whether it is natural diamond, laboratory-grown diamond, or a simulant such as cubic zirconia.

Identified October 15, 2026More gemstone →

Explore Colorless faceted gemstone, likely diamond 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 more than 1 billion years ago, then reach the surface in kimberlite or lamproite eruptions. Lab-grown diamonds are produced by high-pressure/high-temperature or chemical-vapor-deposition methods.

Uses & applications

Used in jewelry and, owing to its hardness, cutting, grinding, and drilling tools.

Geological facts

Diamond’s extreme hardness and high refractive index produce its characteristic sparkle; a round brilliant cut maximizes light return.

Field identification & locations

Look for high dispersion, sharp facet edges, and strong durability, but identification requires gemological testing; common natural sources include Botswana, Russia, Canada, and South Africa. A photo cannot establish authenticity or origin.