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State Gemstone or Gems
US State Gemstone or Gems
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Not every state has an official state mineral, rock, stone or gemstone.

Find information on the official State Gemstone or State Gems of each of the states that have adopted one.
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State Gemstone of the Fifty-States

State Gemstone and State Gems

Gemstones are one of nature's rarest products. The three attributes that a gemstone must possess are rarity, beauty and color. Even in prehistoric times, people were attracted to pretty pebbles, and when combined with translucency or even transparency with color, they were highly prized for their beauty and durability.

Important Characteristics

The color is a gemstone's most important and individual characteristic. The blending of the various colors or tints of the same color and the various designs and patterns produced as they are by nature, give such gemstone an individual appeal that makes each one unique.


Another sought after quality is a high luster. Amber and some garnet have a resinous luster, while turquoise is sometimes described as "waxy". Luster does not give a stone brilliance. In certain gemstones brilliance is produced by the skillful cutting of the stone's facets in such a way that they reflect light like mirrors, making the whole stone bright and shining when viewed from the top.

These are the main characteristics which give gemstones their unique appearance and which distinguish them from other minerals. There is, however, a most important attribute which gemstones should posses: permanence.

Gemstone of the Fifty-States.

State Gemstone or Gem Adopted
Alabama Star Blue Quartz 1990
Alaska Jade 1968
Arizona Turquoise 1974
Arkansas Diamond 1967
California Benitoite 1985
Colorado Aquamarine Apr 30,
1971
Connecticut
Delaware
Washington, DC
Florida Moonstone May 20,
1970
Georgia Quartz 1976
Hawaii Black coral Apr 22,
1987
Idaho Star Garnet Feb 25,
1967
Illinois
Indiana
Iowa
Kansas
Kentucky Fresh-Water Pearl Jul 15,
1986
Louisiana Agate 1976
Maine Tourmaline 1971
Maryland
Massachusetts Rhodonite ((Mn++,Fe++,Mg,Ca)SiO3 ) 1979
Michigan Chlorastrolite (aka Isle Royale greenstone) Mar 30,
1973
Minnesota Lake Superior agate 1969
Mississippi
Missouri
Montana Agate (SiO2 - Silicon Dioxide) 1969
Montana Yogo Sapphire (Al2O3) 1969
Nebraska Blue Agate (Blue chalcedony)
(SiO2 - Silicon Dioxide)
Mar 1, 1967
Nevada Precious: Virgin Valley black fire opal May 27,
1987
Nevada Semiprecious: Nevada turquoise May 27,
1987
New Hampshire Smoky quartz 1985
New Jersey
New Mexico Turquoise Mar 23,
1967
New York Garnet 1969
North Carolina Emerald 1973
North Dakota
Ohio Flint 1965
Oklahoma
Oregon Sunstone (Plagioclase Feldspar) Aug 4, 1987
Pennsylvania
Rhode Island
South Carolina Amethyst (SiO2 - Silicon Dioxide) Jun 24, 1969
South Dakota Fairburn agate Feb 11, 1966
Tennessee Pearl 1979
Texas Texas blue topaz Mar 26,
1969
Utah Topaz Feb 4,
1969
Vermont Grossular garnet 1991
Virginia
Washington Petrified wood Mar 12,
1975
West Virginia Silicified Mississippian fossil coral Lithostrotionella Mar 10,
1990
Wisconsin
Wyoming Jade (Nephrite) 1967
State Gemstone or Gems
US State Gemstone or Gems
State symbols represent things that are special to a particular state. One of these symbols is the State Gem. Of the 50 states, 19 have adopted a state gemstone and all have adopted some sort of earth symbol.

gem·stone (jem′stōn′)
n.
A gemstone formed in nature, with no assistance from humans that may be used as a jewel when cut and polished.
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