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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 Sergio (Portuguese: Carbonado do Sérgio) was the largest carbonado and the largest rough diamond ever dug up on earth. [1] It weighed 3,167 carats (633.4 g; 20.36 ozt) and was found above ground in Lençóis (State of Bahia, Brazil) in 1895 by Sérgio Borges de Carvalho. Like other carbonados, it is believed to be of meteoritic origin.
The majority of mined diamonds fall between white and pale yellow or brown; what is known as the normal color range. Diamonds of more intense color (usually yellow, but in some cases red, green or blue) are termed fancy color diamonds. Black diamonds are also fancy color diamonds. All other factors being equal, the most valuable diamonds are ...
VRAI shares tips to help navigate the meanings behind various popular lab-grown diamond ring shapes to find the perfect symbol for every unique love story. What Do the Shapes of Engagement Rings Mean?
Pages in category "Black diamonds" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. A. Amsterdam Diamond; B.
The diamond weighs 33.74 carats, making it one of the largest black diamonds known. The diamond is a deep black, which is relatively rare for diamonds. This black color is due to the presence of numerous inclusions, usually graphite, within the stone. Black diamonds, also known as "carbonado," are different from traditional diamonds because ...
Here's a look at the diamond which was found six months ago: The gemstone was purchased by Nemesis International DMCC, a rough-diamond trading company that markets itself as having created "one of ...
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]