
gemstone
Diamond cluster ring
Diamond (carbon, C), faceted and set in jewelry
AI-generated identification · may be incorrectColorless, transparent, adamantine luster, cubic crystal structure, Mohs hardness 10, and specific gravity about 3.52. The image shows faceted stones in a likely metal setting; identity, natural versus laboratory-grown origin, and carat weight cannot be confirmed visually.
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Physical properties
Colorless, transparent, adamantine luster, cubic crystal structure, Mohs hardness 10, and specific gravity about 3.52. The image shows faceted stones in a likely metal setting; identity, natural versus laboratory-grown origin, and carat weight cannot be confirmed visually.
Formation & geological history
Natural diamonds crystallize deep in Earth’s mantle under extreme pressure and temperature, chiefly during the Archean–Proterozoic eons, then reach the surface in kimberlite or lamproite. Laboratory-grown diamonds have the same composition and structure but are produced by HPHT or CVD methods.
Uses & applications
Used primarily in jewelry and abrasives, with industrial applications in cutting, drilling, polishing, and heat management. This appears to be decorative jewelry rather than an unmounted geological specimen.
Geological facts
Diamond is the hardest known natural material, though toughness varies by cleavage direction. Brilliance depends strongly on cut, clarity, color, fluorescence, and setting design.
Field identification & locations
Field identification requires a hardness or thermal/electrical conductivity test plus gemological examination; visual inspection alone is insufficient and simulants such as cubic zirconia or moissanite are possible. Major natural sources include Botswana, Canada, Russia, Australia, and southern Africa.
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