Cassiterite with Quartz and Siderite

Minas da Panasqueira, level 2, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro  Portugal (±1964)

Specimen size: 11.4 × 4.4 × 2.2 cm = 4.49” × 1.73” × 0.87”
Main crystal size: 0.7 × 0.5 cm = 0.28” × 0.20”