What are Yooperlites? These fluorescent sodalite rocks are found along the shores of the Great Lakes and are especially popular in the Upper Peninsula...
By Antoinette Rahn
Do you know what happens when a life-long rockhound — whose professional background involves product development and academia — encounters the problem...
By Bob Jones
I first became interested in fluorescent minerals in the 1930s, when the property of fluorescence was considered more of a novelty than...