Marcasite with Pyrite and Calcite-Dolomite

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

Specimen size: 7.4 × 6.3 × 2.9 cm = 2.91” × 2.48” × 1.14”
Main crystal size: 1.8 × 1.7 cm = 0.71” × 0.67”