Pyrolusite

Aljibe Range, Aliseda, Comarca Tajo-Salor Almonte, Cáceres, Extremadura  Spain (2014)

Specimen size: 5 × 4 × 3.2 cm = 1.97” × 1.57” × 1.26”
Main crystal size: 0.1 × 0.1 cm = 0.04” × 0.04”