The individual crystals range from approximately 3 mm up to 6 mm in length, and many of the individual crystals have formed into rosette-like aggregates. The crystal group is complete on all sides, i.e., no matrix or point of attachment.
Color is dark midnight blue, very lustrous.
All of the Pyrargyrite has been replaced by Acanthite. Looking down through the termination, with magnification, one can see several tiny hollow tubes which extend down the length of the prism. F. Marshall collection. Originally purchased from Pala Properties International in 1971. In this group massive black Uraninite is rich, to very rich on all specimens, associated with several secondary uranium-bearing minerals.