The copper ore-rich rocks lived in rock layers deep in Lake Superior ... according to the Central Michigan Lapidary and Mineral Society. They're composed of a white quartzite matrix with ...

The glaciers moved southward, depositing rocks from up north into the southern tip of Lake Michigan. You’ll find plenty of quartz and granite at the beaches in colors of white, red and black.

Pictured Rocks National Lakeshore known for its sandstone cliffs and quiet, sandy beaches, but the Lake Superior park offers a variety of activities for those planning to visit this summer. The ...

Lake Superior Agates Found a rock that's reminiscent of caramels ... giving the stone its unique dark background and white cracks, according to Michigan Mineralogical Society.