mineral

Industrial Diamond (Bort or Boart)

Diamond (pure Carbon, C)

Hardness: 10 Mohs scale; Color: Often cloudy, grey, or yellow in industrial grades; Luster: Adamantine (inclusions can make it look dull); Crystal structure: Isometric-hexoctahedral; Specific gravity: 3.51

Hardness: 10 Mohs scale
Color: Often cloudy, grey, or yellow in industrial grades
Luster: Adamantine (inclusions can make it look dull)

Identified March 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed deep within the Earth's mantle under extreme pressure and high temperatures, usually between 1 to 3 billion years ago. They are brought to the surface through volcanic pipes called kimberlites.

Uses & applications

Used primarily in industrial cutting, drilling, and grinding tools due to extreme hardness. Lower-quality specimens are used as abrasives. Small or discolored stones are common in affordable gold-plated jewelry (pave or illusion settings).

Geological facts

Bort refers to diamond particles or low-quality diamonds that are not gem-cut quality. The majority (approximately 80%) of mined diamonds are diverted to industrial use rather than the gemstone market.

Field identification & locations

Identified in the field by its ability to scratch absolute minerals and its high thermal conductivity. Commonly found in South Africa, Russia, and Australia. In jewelry settings like this one, it is often surrounded by a faceted metal 'beveled' plate to increase perceived sparkle.

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