Siderite, Quartz, Arsenopyrite, Muscovite, Pyrite

Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal

Specimen size: 11.0 × 10.0 × 3.0 cm = 4.33” × 3.94” × 1.18”
Main crystal size: 1.0 × 0.9 cm = 0.39” × 0.35”