Glowing Rocks Dubbed 'Yooperlites' Discovered In Michigan
"These things are a blast to find," Superior Township resident Erik Rintamaki told WWJNewsradio.com. He offers guided walking tours to search for the special rocks, which glow when exposed to UV light due to the presence of the fluorescent mineral Sodalite. "I've been a rock picker all my life. I got it from my dad, who got it from his dad," said the 43-year-old, who has a side business as an agate dealer.