Arsenopyrite with Quartz, Muscovite and Chlorite

Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (±1970)

Specimen size: 7 × 6.8 × 3.2 cm = 2.76” × 2.68” × 1.26”
Main crystal size: 4.6 × 1.8 cm = 1.81” × 0.71”