Corkite on Goethite

Serra da Mina Mine, Cercal, Santiago do Cacém, Setúbal District  Portugal (2016-2017)

Specimen size: 8.4 × 5.6 × 3.4 cm = 3.31” × 2.20” × 1.34”
Main crystal size: 0.2 × 0.1 cm = 0.08” × 0.04”