Yogo sapphire
Sapphires were first discovered in Montana in 1865, in alluvium along the Missouri River. Sapphire mining began in 1895 after a local rancher named Jake Hoover sent a cigar box of gems to Tiffany’s in New York. More gem-quality sapphires are produced in Montana than anywhere else in North America. It is estimated that at least 28 million carats of...