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RM1757   Calcite
#1368
Valnegro quarry, Filón Obdulia, Duyos, Caravia, Asturias, Spain

Group of calcite crystals, defined, transparent and brilliant, with a developed prism and negative rhombohedron top terminal faces. On a matrix of barite and calcite. They were collected in a  from open-air mining works in the area of Duyos. Nowadays, these samples from this Asturian mine are very difficult to obtain. They come from the former Manchion collection (with label).

Size: 4.9 x 3.0 x 2.8 cm.
Main crystal: 1.5 x 0.4 cm.
Found in 01/1984.
Col. J.M. Manchion (Barcelona) - No.63 (J. Viñals).
Calcite is fluorescent under LW-UV.
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