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these are just a few of the unique gemstones produced in the united states. gemstones produced in the u.s. the united states geological survey reports that notable quantities of gem-quality agate , beryl , coral, diamond , garnet , feldspar , jade , jasper, opal , quartz , ruby, sapphire, shell, pearls
, peridot , topaz , tourmaline , turquoise , and other gem materials are currently produced in the united states. states with gemstone production thirteen states produce almost all of the natural gemstones mined in the united states. they are listed below. arizona arkansas california colorado idaho louisiana...
https://geology.com/gemstones/states/