Cassiterite

Dolcoath Mine, Tuckingmill, Camborne, Camborne - Redruth - Saint Day District, Cornwall  United Kingdom

Specimen size: 3.3 × 2.6 × 2.3 cm = 1.30” × 1.02” × 0.91”
Main crystal size: 0.6 × 0.2 cm = 0.24” × 0.08”