Lewis & Clark Sapphire mine is located on the historic Eldorado ***** deposit located some 200+ feet above the present Missouri River is known to be the largest North American Sapphire deposit. The Lewis & Clark Sapphire mine has produced all colors and sizes of excellent quality stones. From the privately owned 100+ acre Sapphire and gold mine we produce natural untreated, ultra fine and rare Sapphires. Prices per request.