Diamond

Chemical formula (IMA record)

C

Recognition status

Grandfathered

Original-description year in master list

Unknown in the master list

First-discovery country (IMA)

unknown

Crystal system

Cubic

Mohs hardness

10

Measured density

3.511 g/cm³ (measured)

Historical discoverer

Not supplied in the IMA master list

How it occurs in nature

Natural diamonds can form in high-pressure mantle environments and reach the surface in volcanic host rocks. Diamonds also occur in some meteorites and impact-related settings; these are not identical formation pathways.

Related gem names

Discovery & scientific record

The country refers to the master list’s first-discovery country, using modern borders. It is not a list of all deposits. A question mark is retained when the source is uncertain; a special-procedure date can refer to redefinition rather than discovery.

Catalog coverage and profile depth are different: every species in the cited IMA edition is indexed, but this edition does not provide every physical property or a full discovery narrative. The archive leaves those gaps explicit. Formulae and references are adapted from the IMA list under CC BY-SA 3.0; consult the original page for authoritative typography.