Glowing rocks in Michigan? What to know about 'Yooperlites'

Glowing rocks in Michigan? What to know about 'Yooperlites'

Most people do their rock hunting during the day, but you can’t find “Yooperlites” until the sun goes down. Yooperlites are rocks that fluoresce in the dark under ultraviolet light. They became known when a UP resident discovered them in 2017, according to the Michigan Department of Environment, Great Lakes and Energy. Spring is the best time to search for Yooperlites and other rocks, according to Pure Michigan, because winter ice moved beach sa…