The MN State gem: Beautiful Lake Superior Agates - found on both north (MN) and south (WI) shores of Lake Superior. - Agates are semi precious stones so common on Lake Superior beaches no one pays much attention. #MSPdestination
The Lake Superior agate is a type of agate stained by iron and found on the shores of Lake Superior. Agates were formed during lava eruptions that occurred in the midwest region about a billion years ago. The stone’s predominant red color comes from iron, a major industrial mineral found extensively throughout the Iron Range region.