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Carbonado, commonly known as black diamond, is one of the toughest forms of natural diamond. It is an impure, high-density, micro-porous form of polycrystalline diamond consisting of diamond, graphite , and amorphous carbon , with minor crystalline precipitates filling pores and occasional reduced metal inclusions. [ 1 ]
The Enigma diamond is a semi-transparent carbonado with a dark brown/black color. Typically referred to as black diamonds, carbonados are often reserved for industrial uses. Larger specimens are considered collectors’ stones; most gem-quality stones used in contemporary jewelry design have been treated to produce the black color.
The Spirit of de Grisogono is the world's second-largest cut black diamond, behind the Enigma, and the world's sixth largest diamond overall. Starting at an uncut weight of 587 carats (117.4 g), it was taken from its origin in western Central African Republic to be bought and cut by Fawaz Gruosi. [1]
Discovered in 2015, it is the 5th largest diamond ever discovered at the Crater of Diamonds State Park, Arkansas Identified as a Type IIa crystal, the 8.52 carat diamond was cut and polished by Mike Botha into a custom-designed 4.605 carat Triolette shape during a week long event in North Little Rock and was graded a D IF, 0 Polish & 0 Symmetry ...
On "Antiques Roadshow" we took a trip back to 1998 when a woman brought in a gorgeous diamond and ruby jewelry collection she inherited from her great aunt, who was married to a congressman back ...
When the color is rare, the more intensely colored a diamond is, the more valuable it becomes. Another factor that affects the value of fancy-colored diamonds is fashion trends. For example, pink diamonds fetched higher prices after Jennifer Lopez received a pink diamond engagement ring. [16]
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