Prehnite from Keweenaw County, Michigan, USA - image 1
Prehnite from Keweenaw County, Michigan, USA - image 2

Prehnite from Keweenaw County, Michigan, USA

Help improve this record

No owner is registered for this specimen yet. If it's yours or you know more about it, you can add the owner, provenance, publications and other details.

Sign in to contribute
A grouping of large fairly sharp lustrous native copper crystal set on matrix coated by green botryoidal crystallized prehnite. In great condition.

Product details

SpeciesPrehniteCopper
SizeMiniature
Dimensions5.0 x 3.5 x 2.2 cm
Added on11/17/2025
LocalityUSA, Michigan, Keweenaw County
Current owner
Unknown Owner
Acquired
Oct 2026
Previous owners
DateCollectorAcquisition price
—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.
Prehnite
Regional guide
Prehnite from Keweenaw County
Sign in to contribute
Locality guide
Keweenaw County
Keweenaw County, USA - native copper and silver from the Lake Superior district, with sculptural copper crystals and mineral associations for collectors.