Yooperlites are a variety of sodalite-rich syenite found in the Upper Peninsula of Michigan.

She used the money she made to publish books—seven to date, from the history of the U.P. to the geology of Lake Superior’s stones. But running the agate shop hasn’t always been easy ...

Long before the Great Lakes, a rift nearly tore North America in half—leaving behind Lake Superior’s depth, copper-rich ridges, and stories still told today.

Lake Superior is the largest and northernmost of the five Great Lakes. The freshwater lake features dozens of lighthouses and a national park. The lake's history also includes high-profile ...