gemstone
Diamond
C (Carbon)
AI-generated identification · may be incorrectHardness: 10 (Mohs scale), Color: Colorless (typically in jewelry), Luster: Adamantine, Crystal structure: Isometric, Cleavage: Perfect octahedral, Specific gravity: 3.5-3.53
Identified More gemstone →
Explore Diamond in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 10 (Mohs scale), Color: Colorless (typically in jewelry), Luster: Adamantine, Crystal structure: Isometric, Cleavage: Perfect octahedral, Specific gravity: 3.5-3.53
Formation & geological history
Formed at high temperatures and pressures deep within the Earth's mantle over billions of years. Brought to the surface by explosive volcanic eruptions (kimberlite and lamproite pipes).
Uses & applications
Primarily used in jewelry due to its brilliance and durability. Also widely used in industry for cutting, drilling, and grinding tools due to its extreme hardness.
Geological facts
Diamond is the hardest known naturally occurring substance. The largest gem-quality diamond ever found is the Cullinan Diamond.
Field identification & locations
Identify by its extreme hardness (can scratch all other minerals), high refractive index, and adamantine luster. Common locations include Russia, Botswana, Canada, and Australia. Collectors should note clarity, cut, color, and carat weight.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone