Siderite with Pyrite, Quartz and Muscovite

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

Specimen size: 12.3 × 11.6 × 8.5 cm = 4.84” × 4.57” × 3.35”
Main crystal size: 7 × 4.3 cm = 2.76” × 1.69”