Siderite on Quartz with Pyrite

Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã Municipality, Castelo Branco District  Portugal (2000)

Specimen size: 23.7 × 12.4 × 8.1 cm = 9.33” × 4.88” × 3.19”