The most common rock-forming minerals include quartz, feldspar, mica, amphibole, olivine, and calcite. Some rocks are predominantly composed of just one mineral. For example, limestone is a ...

Yooperlites can be found as loose pebbles and cobbles along many Lake Superior beaches and even in some inland gravel pits.

Researchers led by Colin Jackson, a graduate student in geological sciences, have found noble gases to be highly soluble in amphibole, a mineral commonly found in oceanic crust. "We found ...

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

For some, collecting rocks and gemstones is a childhood memory. Organizers of the Michiana Gem & Mineral Show are hoping to inspire a new generation of collectors, one rock at a time. If you ask ...

The hard, magnetic teeth of a leathery red-brown mollusk nicknamed “the wandering meatloaf” possess a rare mineral previously seen only in rocks. The mineral may help the mollusk — the giant ...

Throughout the year, the best time to seek Yooperlites and other stones is after a storm, when waves have disrupt and uncover new rocks. Sodalite is a deep blue to blue-violet mineral best known ...