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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 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.
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.
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.
Many aspects of Central African Republic's geologic history remain unknown. Along with the Brazilian state of Bahia, CAR is the only country known to host carbonados (black diamond aggregates), which some researchers have suggested may be connected to a Precambrian meteorite impact that could also have generated the Bangui magnetic anomaly.
Snowfall director Damian Marcano wanted to show another side of strippers-turned-assassins Black Diamond and Dallas, so he explored them through motherhood. The end result was an awkward-but ...
A fascinating aspect of carbonados is that there is no consensus about their origins, as illustrated by the quotes and citations below. The article has unduly emphasized a recent hypothesis. Heaney, P. J., Vicenzi, E. P., and De, Subarnarekha, 2005, Strange diamonds: The mysterious origins of carbonado and framesite.
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