Herbertsmithite with Paratacamite
Thumbnail, 3.0 x 2.0 x 1.0 cm
San Francisco mine, Sierra Gorda, Antofagasta Province, Chile

A thumbnail with exceptionally well-developed, lustrous, blue-green crystals of herbertsmithite to 1 mm and green paratacamite. Herbertsmithite is a copper zinc hydroxy-chloride and is a member of the Atacamite Group. Ex. Paulo Matioli collection.