Colusite, Sphalerite
Gioia quarries, Casette, Massa, Massa-Carrara Province, Tuscany, Italy
Small black crystals of colusite on marble matrix (the largest colusite crystal, at sphalerite top, is around 0.4 mm in size) - Former Amedeo Cassettari collection, 1999
© Dott. Geol. Marco Barsanti - geoman1@tin.it