gemstone
Diamond
Diamond (Pure Carbon crystallization)
AI-generated identification · may be incorrectHardness: 10 (Mohs scale), Color: Clear/Colorless, Luster: Adamantine, Crystal Structure: Isometric-Cubic, Cleavage: Perfect in four directions.
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: Clear/Colorless, Luster: Adamantine, Crystal Structure: Isometric-Cubic, Cleavage: Perfect in four directions.
Formation & geological history
Formed under extreme pressure and high temperature in Earth's mantle, approximately 100 miles below the surface, and brought upward by kimberlite pipe volcanic eruptions.
Uses & applications
Primary use in jewelry and high-end luxury goods; also used in industrial cutting, grinding, and drilling tools due to its extreme hardness.
Geological facts
Diamonds are the hardest natural substance on Earth. Most natural diamonds are between 1 billion and 3.5 billion years old.
Field identification & locations
Identified by its high refractive index and hardness. In the field, it is typically found in kimberlite pipes or alluvial deposits. Collectors look for the 'Four Cs': Cut, Color, Clarity, and Carat weight.
More like this
Other gemstone specimens
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
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
Black Opal Ring (Carved Opal)
Hydrated Silicon Dioxide (SiO2·nH2O)
gemstone