Montana designated both the sapphire and Montana Agate as the official state gemstones in 1969. Montana's sapphires (mostly found in western Montana) look like bright, blue glass and are cut like diamonds to make jewelry. Montana sapphires can be found in the Royal Crown Jewels of England. Sapphires, which were thrown away by miners in the gold rush days, are now the most valuable gemstones found in America.
The Montana Council of Rock and Mineral Clubs asked the legislature to declare both the sapphire and the Montana agate as Montana’s official state gemstones.