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.
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.
See the CHATOYANCE!!!
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