Chalcocite with Prehnite - image 1
Chalcocite with Prehnite - image 2
specimen video

Chalcocite with Prehnite

Unknown Owner
Metallic crystals of chalcocite to 0.1 cm in size scattered richly across the top of a botryoidal green prehnite crystal matrix. In good condition. A neat thumbnail specimen for this mining district.

Product details

Species
Prehnite, ChalcociteAbout Prehnite →
SizeMiniature
Dimensions3.0 x 2.3 x 2.0 cm
Added on05/27/2026
Locality
Clark Mine, Keweenaw Co., Michigan, USA

Known provenance

DateCollectorAcquisition price
05/2026Unknown Owner$235.00
—Weinrich MineralsNot disclosed

Learn more

Prehnite
Mineral guide
Learn about Prehnite
apple- to mint-green crystals and sculptural botryoidal/rosette forms; a calcium aluminum silicate formed in low-temp hydrothermal environments.