Calcite with Chalcocite pseudomorphs after Covellite

Item Description

An attractive association specimen featuring a stout trigonal crystal of white Calcite which is intersected by black tabular crystals of what were formerly Chalcocite that have been pseudomorphed by Covellite. There is a small "rub" on the termination of the Calcite crystal, but overall the piece is in good condition. I can't recall seeing many pieces like this from Butte, especially with a Calcite crystal of this size. Ex Ken Hogan collection.
Ex George Loud Collection No. 6062; 14.1.1.1 MT.3. George (born August 16, 1942) is a well-known mineral collector from Washington, DC and South Carolina respectively, and was a patent lawyer by trade for over 50 years. He assembled one of the great mineral collections in the U.S., comprising worldwide specimens, and in later years he sold the worldwide specimens to focus on minerals of the United States, specifically locality suites with an emphasis on amazing representation of species while still maintaining fine quality. The specimens remarkably range from micros to all the way up to large cabinets in size. We recently acquired most of his impressive 9000+ piece collection, and the VAST majority of these pieces will be offered here in the auctions, as we feel that everyone deserves and equal opportunity at acquiring these important, well-documented and fine quality specimens for their collections.
See: https://mineralogicalrecord.com/biographies_labels/george-loud for more information