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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.
This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.
The Black Diamond, a 1921 British novel by Francis Brett Young; Black Diamond: The Story of the Negro Baseball Leagues, a 1994 book by Patricia and Fredrick McKissack; Black Diamonds: The Aboriginal and Islander Sports Hall of Fame, a 1996 book, incorporating the first round of the Aboriginal and Islander Sports Hall of Fame project
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 ...
The Black Orlov is a black diamond, also known as the Eye of Brahma Diamond. It weighs 67.50 carats (13.500 g). [ 1 ] The diamond—originally 195 carats (39.0 g)—is said to have been stolen in the early 19th century in India.
The Korloff Noir is one of the world's largest known black diamonds. It is an 88-carat diamond, with 57 edges. Before it was cut and polished, it had 421 carats. It is named for the Korloff -Sapojnikoff family, members of the Russian nobility, who once owned it. In 1978, Daniel Paillasseur, a French jeweller, purchased it. [1]
Black Diamonds: - **Rarity**: Black diamonds, also known as "carbonado," are different from traditional diamonds because they are typically more opaque and have a unique polycrystalline structure. - **Formation**: There is some debate about how black diamonds form, but it is believed they may originate from space or through high-pressure ...
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