Krohnkite (very rare) (ex David Burgess Collection)

Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile (Type Locality)
2.7 x 2.4 x 2.3 cm
Start Time: 07/08/2019 6:30:00 pm (CDT)
End Time: 07/11/2019 7:00:00 pm (CDT)
Auction Closed

Item Description

Krohnkite is a very rare hydrated sodium copper sulfate, only found in about 2 dozen localities in the world. With that said, the finest known examples of the species are still those from the type locality, the Chuquicamata Mine in Chile. This thumbnail sized specimen hosts several, attractive, beautiful blue-green colored partial crystals of Krohnkite and one particularly well-formed, sharp, lustrous monoclinic prism measuring 1.0 cm sitting on matrix. The color is excellent for the species, and the fact that there one really nice crystal on the piece makes all the difference. If you're a rarity collector, don't pass this one up, as they are not often available on the market. From the worldwide collection of David Burgess (1951-2016). David was a prolific species collector from Newington, Connecticut, and the namesake for the extremely rare cobalt arsenate species Burgessite, which he discovered.