Search
Now showing items 1-10 of 66
Epidote
(St. Croix Rockhounds, Stillwater, MN, 1994)
What are those fibers in my rose quartz?
(St. Croix Rockhounds, Stillwater, MN, 2003)
Minerals and geology of the Weyerhauser Copper Mine, near Gordon, Douglass County, Wisconsin
(St. Croix Rockhounds, Stillwater, MN, 1989)
Cosmetic minerals of Ancient Egypt
(St. Croix Rockhounds, Stillwater, MN, 2000)
Silicon, Silica, Silicates and Silicone
(St. Croix Rockhounds, Stillwater, MN, 1998)
Thunder Bay Agate Mine
(St. Croix Rockhounds, Stillwater, MN, 2001)
Minerals that attack your concrete driveway
(St. Croix Rockhounds, Stillwater, MN, 2006)
Why do some mineral change color when you turn them?
(St. Croix Rockhounds, Stillwater, MN, 2009)
Blue, blue, my quartz is blue
(St. Croix Rockhounds, Stillwater, MN, 1995)
How amethyst cathedrals form
(St. Croix Rockhounds, Stillwater, MN, 2007)