Diamond Macle Twin Var. CONGO BOART

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A great example of a Diamond Macle Twin with a triangular aspect and opaque deep pistachio-green colour. The Diamond measures to 8 mm and is from the Kasai-Oriental area of the Democratic Republic of the Congo. This area was extensively mined for placer Diamonds before the discovery of several Kimberlite pipes. It is a lovely example of this habit of Diamond and comes in a small clear plastic box with integral magnifying lens in the lid. Macle is a crystallographic term which describes a twin crystal of spinel law habit forming two interwoven lozenge (or diamond) shaped prisms. The regional name for such twins is Congo Boart, Boart being the term for a granular, opaque diamond.