1.2 x 0.8 x 0.6 cm. Diamonds are very rare from this landlocked West African State. This lustrous, dark brown 4.23 carat euhedral diamond is a carbonado. Carbonado is a massive, opaque, gray, brown, or black variety of diamond used as an abrasive and in rock drill bits. Specimens are rarely available from any locality, since they are mined ...
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