Cassiterite with Calcite, Arsenopyrite and Quartz

Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (10/2017)

Specimen size: 5.2 × 3.8 × 2.1 cm = 2.05” × 1.50” × 0.83”
Main crystal size: 2.5 × 2.3 cm = 0.98” × 0.91”