This is a MAJOR example of the species from a small find that few people are aware of, I have found. I am told it was a small pocket in the mid-1980s, and I have seen only a handful turn up on the market as old collections recycle. These simply blow away other Mexican jamesonite specimens, and most worldwide jamesonite for that matter as well, for their robust crystals and bright metallic luster. In fact, I would venture to say these are the world's best jamesonites, for my own taste. This piece has a rich smothering of splendent, metallic-gray crystals of jamesonite to 4.0 cm across in on druse of brassy yellow pyrite. There is also a gray rhombohedron of calcite perched on top, measuring 3 cm across. This specimen is one of the two largest and richest jamesonite specimens I have seen from this deposit, and is very important for the species. Comes with custom lucite base already made for the specimen. This specimen was on loaned exhibit in the University of Arizona Museum for over a decade until my purchase of this collection in 2008.