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  2. Carbonado - Wikipedia

    en.wikipedia.org/wiki/Carbonado

    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 ]

  3. Sergio (carbonado) - Wikipedia

    en.wikipedia.org/wiki/Sergio_(carbonado)

    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.

  4. Amsterdam Diamond - Wikipedia

    en.wikipedia.org/wiki/Amsterdam_Diamond

    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 ...

  5. The Enigma (diamond) - Wikipedia

    en.wikipedia.org/wiki/The_Enigma_(diamond)

    The Enigma. The Enigma [1] is the largest cut diamond in the world, [2] containing 55 facets and weighing 555.55 carats (111.11 grams).. Richard James Schueler, purchased the black diamond "The Enigma" in February 2022 for $4.3 million in cryptocurrency at Sotheby's The funds for Schueler's acquisition of the diamond are alleged by the SEC to come from misappropriations of PulseChain investor ...

  6. List of largest rough diamonds - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_rough_diamonds

    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.

  7. Korloff Noir - Wikipedia

    en.wikipedia.org/wiki/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]