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Lake Superior Agate

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Manitou Island, Lake Superior, Keweenaw Co., Michigan, USA
© Paul T. Brandes

Show Lake Superior Agate Photos (2)
A variety of Agate

Believed to be the world's oldest agates, over 1 billion years old, these are found throughout the northern US having been spread from the original Lake Superior region by glaciation. It has generally pale colouring.

Classification of Lake Superior Agate

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Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Lake Superior Agate

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    Localities for Lake Superior Agate

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    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    USA
     
    • Iowa
    		Jay Ellis Ransom,1974, Gems and Minerals of America
      • Dubuque Co.
    		www.missourigeologists.org/Min-Loc2.pdf.
    Jay Ellis Ransom,1974, Gems and Minerals of America
      • Jackson Co.
      • Muscatine Co.
        • Muscatine
    		R&M 77:6 pp 404-413
    R&M 77:6 pp 404-413
    • Kansas
      • Jefferson Co.
    		Ransom, 1974. Gems and Minerals of America
    • Michigan
    		Earth Science v.19, no. 2, p.98. (1966)
    www.dnr.state.mn.us/education/geology/digging/agate.html.
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
      • Lake Co.
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    • Missouri
    		Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974, Gems and Minerals of America
    Jay Ellis Ransom,1974,Gems and Minerals of America
    • Nebraska
      • Cass Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Cuming Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Dodge Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Douglas Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Gage Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Johnson Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Lancaster Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Madison Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Nemaha Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Otoe Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Pawnee Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Richardson Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Saline Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Saunders Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Seward Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    The Minerals and Gemstones of Nebraska CSD U Neb EC 2
      • Thurston Co.
    		The Minerals and Gemstones of Nebraska CSD U Neb EC 2
    • Tennessee
      • Shelby Co.
    		Zeitner ,1968. Appalachian Mineral & Gem Trails
    • Wisconsin
    		Gems and Minerals of America - Jay Ellis Ransom-1974
    Gems and Minerals of America - Jay Ellis Ransom-1974
    Gems and Minerals of America - Jay Ellis Ransom-1974
      • Pepin Co.
    		Gems and Minerals of America - Jay Ellis Ransom-1974
    Gems and Minerals of America -Jay Ellis Ransom-1974
    Mineral and/or Locality
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    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.