Having started my career with the Anaconda Mining Company (who began mining at Butte in 1869), I consider this to be one of the finest specimens from Don Zowader's collection. It is an exceptionally large diginite crystal in a matrix of pyrite and quartz. The pyrites have an interesting red tarnish on them. This piece has great provenance, having been in the Dick Walker collection, and later purchased by Mike Groben in 1981. Don aquired this specimen as a memento of his dear late friend Mike.