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Now showing items 81-89 of 89
What's in a mineral name?
(St. Croix Rockhounds, Stillwater, MN, 1990)
What the heck is limonite?
(St. Croix Rockhounds, Stillwater, MN, 2005)
New places to look for diamonds
(St. Croix Rockhounds, Stillwater, MN, 1993)
Wisconsin's diamond six-pak
(St. Croix Rockhounds, Stillwater, MN, 1998)
Why do such large crystals form in pegmatites?
(St. Croix Rockhounds, Stillwater, MN, 1987)
Temples of galena
(St. Croix Rockhounds, Stillwater, MN, 1991)
Mineral named for Iowa
(St. Croix Rockhounds, Stillwater, MN, 1990)
Mineral from giant red suns
(St. Croix Rockhounds, Stillwater, MN, 1995)
Moon mineral found on Earth
(St. Croix Rockhounds, Stillwater, MN, 1993)