A complete specimen, formed by a group of well-defined hübnerite tabular crystals with parallel growths, one of them predominant, intense black color, on which has grown a group of lenticular siderite crystals of greenish to yellowish color and a small fluorapatite . On a matrix of hyaline quartz with pyrite and a brilliant group of arsenopyrite crystals. THE MAIN CRYSTAL IS: 2,3 x 2 x 0,3 cm.

ORIGIN: PANASQUEIRA MINES, VILLAGE OF SÃO FRANCISCO DE ASSIS, COVILHÃ, CASTELO BRANCO, COVA DA BEIRA, PORTUGAL

DIMENSIONS: 6.2x5x2.6