gemstone
Diamond
Carbon (C)
AI-generated identification · may be incorrectHardness of 10 on the Mohs scale, isometric crystal system, adamantine luster, and perfect octahedral cleavage.
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 of 10 on the Mohs scale, isometric crystal system, adamantine luster, and perfect octahedral cleavage.
Formation & geological history
Formed under extreme heat and pressure in Earth's mantle, approximately 100 to 150 miles deep, and brought to the surface via kimberlite pipes.
Uses & applications
Extensively used in fine jewelry, high-end timepieces, and various industrial cutting and grinding tools.
Geological facts
Diamonds are the hardest known natural material on Earth and can conduct heat five times faster than copper.
Field identification & locations
Identified by its extreme hardness, high refractive index, and adamant luster; commonly mined in South Africa, Russia, and Canada.
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
Pearl necklace
Pearl, primarily aragonite (CaCO₃) and conchiolin
gemstone