Thirty-five of the 50 states have designated an official gem or gemstone. (Montana and Nevada have named both a precious and semiprecious gemstone.) Although the laws may call them "gems," they are generally not sparkling crystals, so I prefer to call them all gemstones. The majority are colorful rocks that look their best as flat, polished cabochons, perhaps in a bolo tie or belt buckle. They are unpretentious, inexpensive stones with democratic appeal.
See the state gems listed by state
See gemstone names correlated with their mineral names