Mineral: Adamite, Calcite, Duftite
Chemistry: Zn2(AsO4)(OH)
Size: 72 mm
Owner: Mariusz Oleszczuk
Photographer: Mariusz Oleszczuk

Crystals of pale, spearmint-green cuprian adamite (to 6 mm) in a vug that was first lined with white calcite and groups of moss-green microcrystals of duftite (?).

The adamite has been verified by Raman spectroscopy.  The very pale green colour suggests that the composition of the adamite is probably quite close to the zincian end-member of the adamite-olivenite solid solution series.