The famous mines at Butte, Montana, USA once produced the world's best digenites. This old specimen features striated digenite crystals up to nearly 1 cm size, with typical, dull matte lustre. Grown on massive digenite, accompanied by minor pyrite. Somehow difficult to photograph due to the metallic lustre, better in person.

Comes with old Alex Franz label and corresponding number sticker. Alexander Franz was born in Göttingen in 1906. He was trained in optics at the Technical School in Jena, receiving his Master's Degree in 1929. He then joined his family's optics business in Hannover, managing it with the help of his brother in his early years, and thereafter by himself.
Franz became interested in minerals at an early age, and built a personal collection which unfortunately was lost during the chaos of the war years. Nevertheless, he built up a substantial new mineral collection following the war.
Franz died in Meerbusch, near Düsseldorf, on October 25, 2000. His collection was purchased by the mineral dealer Christian Rewitzer in Furth im Wald, and the specimens were then sold off individually.