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 ...

Innocuous rocks in regular light become something special when lit by ultraviolet rays. The rocks were part of the third annual Sample's Agate Gem and Mineral Shop's Agate Show Saturday, Jan. 5, at ...

These gray rocks don’t look like much until you shine UV light on them. Suddenly you’ll see the fluorescent sodalite in them light up orange and yellow. Not all sodalite glows, but Yooperlites are ...