Arsenopyrite with Siderite and Chalcopyrite

Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã Municipality, Castelo Branco District  Portugal

Specimen size: 7.3 × 5.7 × 3.8 cm = 2.87” × 2.24” × 1.50”
Main crystal size: 1.5 × 1.4 cm = 0.59” × 0.55”