Pyrite on Quartz with Siderite

Minas da Panasqueira, level 0, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (06/2014)

Specimen size: 5.4 × 4.6 × 2.4 cm = 2.13” × 1.81” × 0.94”
Main crystal size: 0.7 × 0.1 cm = 0.28” × 0.04”