Now showing items 87-90 of 90

    • Wisconsin talc 

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

      Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 1996)
    • Wisconsin's diamond six-pak 

      Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 1998)
    • The world's largest crystal 

      Cordua, William S. (William Sinclair), 1947- (St. Croix Rockhounds, Stillwater, MN, 1988)