Long Business Description The Gem Gallery, located in downtown Bozeman, Montana, is Bozeman’s premier custom jewelry store. We have been creating custom jewelry in gold, platinum, palladium and silver since 1994. From the beginning, we have had one of the largest selections of Yogo Sapphires and Fancy Montana Sapphires available. Our store and our designs have been built on the beauty of Montana’s own Sapphires.