Listed below are the most important and/or plentiful gemstones found in each US State.

StateGemstones Found
Alabama Beryl, blue and yellow; Smoky Quartz, Hematite
Alaska White Quartz, Jade
Arizona Agatized wood (Petrified wood), Azur-Malachite, Turquoise, Garnet, Peridot, Jasper, Moissanite
Arkansas Clear & Smoky Quartz, Diamond, Agate
California Agate, Benitoite, Californite, Diamond, Citrine, Tourmaline, Abalone Pearl, Kunzite, Chrysoprase, Morganite, Jadeite, Jasper, Quartz, Turquoise
Colorado Beryl, Aquamarine, Phenacite, Garnet, Amethyst, Agate, Citrine, Pyrite, Rose Quartz, Diamond, Fluorite, Topaz, Peridot, Quartz, Rhodonite
Connecticut Beryl, yellow and green; Rose Quartz, Garnet, Tourmaline
Delaware Pearl
Florida Chalcedony, Conch Pearl
Georgia Ruby, Beryl, Amethyst, Citrine, Garnet, Quartz
Hawaii Peridot, Coral
Idaho Garnet, Opal, Agate, Obsidian, Sapphire
Illinois Fluorite, Pearl
Indiana Obsidian, Pearl
Iowa Fossil Coral, Pearl, Chalcedony
Kansas Chalcedony
Kentucky Pearl
Louisiana Chalcedony
Maine Tourmaline, Beryl, Rose Quartz, Pearl, Topaz, Amazonite, Clear & Smoky Quartz, Aquamarine
Maryland Beryl, Clam Pearl
Massachusetts Beryl
Michigan Agate, Chlorastrolite, Hematite
Minnesota Agate, Thomsonite
Mississippi Pearl, Chalcedony
Missouri Pearl, Fluorite, Pyrite, Calcite
Montana Agate, Sapphire, Beryl, Amethyst, Smoky Quartz, Obsidian, Tourmaline, Garnet
Nebraska Chalcedony, Pearl
Nevada Rock Crystal, Citrine, Nevada Turquoise, Virgin Valley Black Fire Opal
New Hampshire Beryl, Rock Crystal, Garnet
New Jersey Smoky Quartz, Agate, Pearl, Prehnite
New Mexico Turquoise, Garnet, Peridot, Rock Crystal, Obsidian
New York Beryl, Brown Tourmaline, Rose Quartz, Fresh Water Pearl
N Carolina Beryl, Aquamarine, Emerald, Almandite Garnet, Rhodolite, and Pyrope Garnet, Diamond, Cyanite, Hiddenite, Amethyst, Ruby, Sapphire, Smoky & Clear Quartz
N Dakota Chalcedony, Agate
Ohio Chalcedony, Fossil Coral
Oregon Agate, Obsidian, Hydrolite, Sunstone
Pennsylvania Amethyst, Almandite Garnet and Pyrope Garnet, Beryl, Sunstone, Moonstone
Rhode Island Quartz, Amethyst
S Carolina Beryl, Smoky & Clear Quartz
S Dakota Beryl, Agate
Tennessee Pearl
Texas Beryl, Pearl, Tourmaline
Utah Topaz, Garnet, Petrified Wood, Jasper, Obsidian
Vermont Aquamarine, Pearl
Virginia Amethyst, Garnet, Beryl, Moonstone
Washington Agate, Pearl
West Virginia Quartz
Wisconsin Agate, Pearl
Wyoming Agate (including Moss Agate), Jade, Ruby, Jasper, Star Sapphire

Also see US State Gemstones and American Patriotic Gifts


Useful Books & Bibliography:

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