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Official State Gemstones

Official gemstones listed by state. (List by state or year)
StateList by state Name Designated as Year
Alabama Star Blue Quartz Official gemstone 1990
Alaska Jade Official state gem 1968
Arizona Turquoise Official state gemstone 1974
Arkansas Diamond Official state gem 1967
California Benitoite Official state gemstone 1985
Colorado Aquamarine State gemstone 1971
Connecticut [ None ]    
Delaware [ None ]    
Florida Moonstone Florida state gem 1970
Georgia Quartz State of Georgia's official gem 1976
Hawaii Black coral Official gem 1987
Idaho Star garnet Official state stone, or gem 1967
Illinois [ None ]    
Indiana [ None ]    
Iowa [ None ]    
Kansas [ None ]    
Kentucky Freshwater-pearl State gemstone 1986
Louisiana Cabochon cut gemstone, derived from Crassostrea virginica mollusk Official state gemstone 2011
Maine [ None ]    
Maryland Patuxent River Stone State gem 2004
Massachusetts Rhodonite Gem or gem emblem 1979
Michigan Chlorastrolite State gem 1972
Minnesota Lake Superior agate Official gemstone 1969
Mississippi [ None ]    
Missouri [ None ]    
Montana Montana agate Official Montana state gem stone 1969
Montana Sapphire Official Montana state gem stone 1969
Nebraska Chalcedony stone, Blue agate State gem stone 1943
Nevada Virgin Valley black fire opal Official state precious gemstone 1987
Nevada Nevada turquoise Official state semiprecious gemstone 1987
New Hampshire Smoky quartz Official state gem 1985
New Jersey [ None ]    
New Mexico Turquoise Official gem 1967
New York Garnet Official gem 1969
North Carolina [ None ]    
North Dakota [ None ]    
Ohio Ohio flint (Crypto-crystalline variety of quartz) Official gem stone 1965
Oklahoma [ None ]    
Oregon Sunstone Official gemstone 1987
Pennsylvania [ None ]    
Rhode Island [ None ]    
South Carolina Amethyst Official gem stone 1969
South Dakota Fairburn agate Official state gemstone 1966
Tennessee Tennessee pearl Official state gem 1979
Texas Blue topaz State gemstone 1969
Utah Topaz State gem 1969
Vermont Grossular garnet State gem 1992
Virginia [ None ]    
Washington Petrified wood Official gem 1975
West Virginia Calcedony State gem 1990
Wisconsin [ None ]    
Wyoming Jade Official gemstone 1967
Rocks and Minerals

Rocks and Minerals, written and edited by Caroline Bingham. 48 pages. Publisher: DK CHILDREN; 1st edition (January 2004) Reading level: Ages 5-8.

Eye Wonder Rocks and Minerals introduces geologic elements to budding scientists - Did you know that the amount of gold in any material is measured in carats and that 24-carat gold is pure gold? Find out facts like this and much more in this fascinating guide to rocks and minerals.

Rocks and Minerals (DK Pocket Series)

Rocks and Minerals (DK Pocket Series), by Dorling Kindersley, Ltd. 160 pages. Publisher: DK Publishing, Inc.; Revised edition (June 2003) Reading level: Ages 10-17.

Minerals are solid mixtures of chemicals that each have a unique set of characteristics - just like a fingerprint. Find out how these minerals bind together to form rocks and much, much more.

Collecting Rocks, Gems & Minerals: Easy Identification

Collecting Rocks, Gems & Minerals: Easy Identification, by Patti Polk. 272 pages. Publisher: Krause Publications (May 13, 2010)

Collecting Rocks, Gems and Minerals takes you from having a casual interest in rocks to being a true collector, and it serves as the only book of its kind to have values for these beautiful offerings from nature. The easy-to-use, and durable design of this book makes it the perfect guide to use out in the field, and it:

  • Covers both lapidary and mineral display materials
  • Includes organics such as amber, bone, coral, pearl and shell
  • Lists chemical group, system, hardness, opacity, fracture, specific gravity and more
  • Provides values and tips for locating, buying and collecting
  • Contains 650+ full-color photos
Rocks & Minerals (Smithsonian Handbooks)

Rocks & Minerals (Smithsonian Handbooks), by Chris Pellant. 256 pages. Publisher: Dorling Kindersley (September 1, 2010)

600 incredible photos, precise annotations and detailed descriptions - from the distinguishing features of rocks to which crystal system a mineral belongs to - will help you identify different rocks and minerals quickly and easily. Covers everything from what rocks or minerals are, how they are classified to how to start a collection.

Perfect for rocks and mineral lovers - a comprehensive guide for collectors.