Quartz with Arsenopyrite, Muscovite and Siderite

Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (2004)

Specimen size: 6.4 × 5.9 × 3.6 cm = 2.52” × 2.32” × 1.42”