Simply Science: How were Lake Superior agates formed?
Minnesota's state gemstone is the Lake Superior agate, and for years it has fascinated those young and old.
http://www.kare11.com/video/1756420524001/0/Simply-Science-How-were-Lake-Superior-agates-formed
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Simply Science: How were Lake Superior agates formed?
Minnesota's state gemstone is the Lake Superior agate, and for years it has fascinated those young and old.
KAREweatherlocalsimply scienceNews
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