Cosalite on Quartz
A nicely composed specimen of Cosalite (a lead-bismuth sulfosalt) on Quartz. The Cosalite presents as aggregates of radiating ﬁbrous dark lead-gray crystals sitting on a Quartz crystal cluster. A superb specimen. Specimens like this are not seen often on the market today.
Pequa Rare Minerals label accompanies the specimen.
Ex. David S. Burgess collection.