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Now showing items 1-4 of 4

Diamond-wrongs

Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 2008)

Minnesota kimberlites

Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 1991)

New places to look for diamonds

Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 1993)

Wisconsin's diamond six-pak

Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 1998)