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Now showing items 81-89 of 89
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)
Field spar
(St. Croix Rockhounds, Stillwater, MN, 2004)
Pieces of eight minerals
(St. Croix Rockhounds, Stillwater, MN, 2003)
Rust minerals
(St. Croix Rockhounds, Stillwater, MN, 1996)
What's in a mineral name?
(St. Croix Rockhounds, Stillwater, MN, 1990)
Geology and the growth of downtown Stillwater
(St. Croix Rockhounds, Stillwater, MN, 1993)
Arsenic and old sandstone
(St. Croix Rockhounds, Stillwater, MN, 1999)