Search
Now showing items 1-10 of 11
Minerals and geology of the Weyerhauser Copper Mine, near Gordon, Douglass County, Wisconsin
(St. Croix Rockhounds, Stillwater, MN, 1989)
Crystal diving for fluid inclusions
(St. Croix Rockhounds, Stillwater, MN, 1989)
Minnesota twin crystals
(St. Croix Rockhounds, Stillwater, MN, 1989)
The world's largest crystal
(St. Croix Rockhounds, Stillwater, MN, 1988)
Old lead mines of Southeastern Minnesota
(St. Croix Rockhounds, Stillwater, MN, 1988)
Placer gold from the St. Croix Dalles, Minnesota and Wisconsin
(St. Croix Rockhounds, Stillwater, MN, 1989)
What's in a vug?
(St. Croix Rockhounds, Stillwater, MN, 1988)
Why is there so much native copper in Michigan?
(St. Croix Rockhounds, Stillwater, MN, 1988)
Ice mineralogy
(St. Croix Rockhounds, Stillwater, MN, 1989)
False forms
(St. Croix Rockhounds, Stillwater, MN, 1989)