Add Yahoo as a preferred source to see more of our stories on Google. Most people do their rock hunting during the day, but you can't find "Yooperlites" until the sun goes down. Yooperlites are rocks ...

The Great Lakes, the largest freshwater system in the world, are home to a diverse geological makeup spanning hundreds of millions of years. While many head to the planet's largest freshwater body of ...

HOUGHTON, MI – There’s a new, easy way to experience one of Michigan’s natural treasures. Yooperlites, sodalite-bearing syenites that possess fluorescent properties, are now on display in the Upper ...

“Fluorescent sodalite-bearing syenite” is a mouthful, but these glowing rocks from the U.P. are also known as Yooperlite. Credit: Courtesy photo The 77th Greater Detroit Gem, Mineral & Fossil Show is ...

Erik Rintamaki, 43, of Brimley, considers himself an amateur rock hound who's been on a wild ride, all because of some beautiful fluorescent specimens. Rintamaki said he was out on a Lake Superior ...

Yooperlite hunting in Michigan is always an adventure, but with the help of a black light, we discovered something truly unbelievable in these stones! Join us as we explore what these glowing ...

Erik Rintamaki was searching for rocks on a Michigan beach last summer when he made what he calls a “mind blowing” discovery. Resting among the thousands of pebbles covering the Lake Superior beach, ...

Yooperlites are rocks that fluoresce under UV light. The best time to search for Yooperlites is after a storm, when waves may have unearthed new rocks along the shores of Lake Superior. Rock hunters ...