Voltaite & Szomolnokite. Exceptionally rich specimen of voltaite (whitish crystalline crust and specks) on crystals of brown szomolnokite. Both species are sulfates and both contain iron. Voltaite also contains potassium. 5 x 4 x 2.5 cm. Alcaparrosa Mine, Cerritos Bayos, Chile.

This is a final image, you can pin it or share it on any social network.