Black Diamond Pair - 0.40 CT

SKU #010

Gem Type: Black Diamond
Color: Black
Shape: round
Dimensions: 3.6 x 3.6 x 2.4 mm
Treatment: Heat
Carat Weight: .40 ct
Cut Grade: Fair/Slight Surface Flaws
Clarity: Opaque 

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Carbonado, commonly known as the ‘Black Diamond,’ is a natural polycrystalline diamond found in alluvial deposits in the Central African Republic and Brazil. Its natural color is black or dark grey, and it is more porous than other diamonds. Carbonado diamonds are typically pea-sized or larger porous aggregates of many tiny black crystals. The most characteristic carbonados have been found only in the Central African Republic and in Brazil, in neither place associated with kimberlite, the source of typical gem diamonds. Lead isotope analyses have been interpreted as documenting crystallization of carbonados about 3 billion years ago. The carbonados are found in younger sedimentary rocks.