Marcasite with Calcite-Dolomite and Chalcopyrite

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

Specimen size: 11.2 × 7.8 × 3.6 cm = 4.41” × 3.07” × 1.42”
Main crystal size: 1.2 × 0.8 cm = 0.47” × 0.31”