Tennantite, (after Azurite)

Size: 102 x 64 x 36 mm
Owner: Crystal Classics
Photographer: Olga Kaspera

Sooty, grey-black tennantite, pseudomorphous after azurite (?) crystals, the largest of which measures 98 by 44 mm.  A little white cerussite adheres to he surface of the large crystal.

The specimen is from the Franz Lammer (Austria) collection.