Just shine a blacklight at them for the ore distribution, apparently!
(https://www.cbsnews.com/news/michigan-man-discovers-glowing-florescent-rocks-called-yooperlites/)
Just shine a blacklight at them for the ore distribution, apparently!
(https://www.cbsnews.com/news/michigan-man-discovers-glowing-florescent-rocks-called-yooperlites/)