“4.3 x 4.0 x 3.7 cm. Hureaulite is a rare and beautiful manganese phosphate that was named in 1825 after the type locality, a village in France by the name of Hureaux. Arguably the best and most well-known samples are those from the Jocão pegmatite in Brazil with their glowing electric orange-pink crystals in larger sized crystals (most other hureaulites are micro crystals from various localities around the world). This piece is a superb, classic specimen of hureaulite featuring notably sharp, lustrous, translucent, vibrant orange-pink colored monoclinic crystal groups. The largest cluster of crystals measures 8 mm long. The matrix features a dark mineral (most likely rockbridgeite or possibly phosphosiderite (?)). From the collection of Rolando Gioia (a contributor to the new definitive book on Brazilian minerals: "Minerais e Pedras Preciosas do Brasil").
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Robert Lavinsky - 20th February 2018