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Carbonado. Typically black, can be grey, various shades of green and brown sometimes mottled. 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 ...
Korloff Noir. 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]
Original owner. De Grisogono. The Spirit of de Grisogono is the world's largest cut black diamond and the world's fifth 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 and cut by Swiss jeweler De Grisogono. The resulting mogul-cut diamond weighs 312. ...
Diamonds occur in a variety of colors—steel gray, white, blue, yellow, orange, red, green, pink to purple, brown, and black. [ 2][ 3] Colored diamonds contain interstitial impurities or structural defects that cause the coloration; pure diamonds are perfectly transparent and colorless.
Inclusions can be found in these crystals that provide clues to the origins of the Herkimer diamonds. Found within the inclusions are solids, liquids (salt water or petroleum), gases (most often carbon dioxide), two- and three-phase inclusions, and negative (uniaxial) crystals. A black hydrocarbon is the most common solid inclusion. [6]
Black Oxford Apple. The Black Oxford apple is an antique heirloom variety. It was first discovered in Oxford County, Maine in the late 18th century. The trees are long-lived (over 100 years) and ...
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