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Now showing items 21-30 of 89
The world's largest crystal
(St. Croix Rockhounds, Stillwater, MN, 1988)
Wisconsin talc
(St. Croix Rockhounds, Stillwater, MN, 1993)
Minnesotaite
(St. Croix Rockhounds, Stillwater, MN, 1990)
Hunting the source of Georgia tektites
(St. Croix Rockhounds, Stillwater, MN, 2005)
Dense as a rock
(St. Croix Rockhounds, Stillwater, MN, 2001)
Treacherous mineral
(St. Croix Rockhounds, Stillwater, MN, 2002)
Diamond-wrongs
(St. Croix Rockhounds, Stillwater, MN, 2008)
Lake full of lead
(St. Croix Rockhounds, Stillwater, MN, 1995)
Minnesota kimberlites
(St. Croix Rockhounds, Stillwater, MN, 1991)
Lazulite or Lazurite?
(St. Croix Rockhounds, Stillwater, MN, 1999)