Crystallized Spinal Twinning Native Silver on Proustite and Erythrite in Calcite Matrix
Bouismas Mine, Bou Azzer mining district, Drâa-Tafilalet Region, Morocco

Here we have a very well crystallized native silver with areas showing spinel twinning. The crystals of rich metallic silver are sharp and angular with high luster growing with proustite and erythrite in calcite matrix which is unusually rare. The dark red colored crystals which are the proustite and erythrite minerals usually are never seen intergrown with silver crystals.
 
32.82 x 25.38 x 14 mm