Semi-precious Gemstones of Minnesota

Ancient lava flows along the North Shore of Lake Superior yield Agates and Thomsonite

The Lake Superior Agate is the state gemstone of Minnesota.

Thomsonite is a zeolite mineral from the North Shore of Lake Superior.

Beautiful Jaspers from the Minnesota Iron Ranges

Silkstone is a chatoyant iron-rich jasper similar to Tigereye.

Binghamite is a chatoyant jasper with fibrous inclusions.

Mary Ellen Jasper is 2 billion year old fossil stromatolite.


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