Prehnite from Ahmeek, Allouez Township, Keweenaw County, Michigan, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
USGS PP144 | |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. USGS PP144 |
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
USGS PP144 | |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. USGS PP144 |