Arsenopyrite-Marcasite with Arsenopyrite and Siderite

Minas da Panasqueira, level 3, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (±2005)

Specimen size: 7 × 5.8 × 4 cm = 2.76” × 2.28” × 1.57”
Main crystal size: 1.1 × 1 cm = 0.43” × 0.39”