“Fluorescent sodalite-bearing syenite” is a mouthful, but these glowing rocks from the U.P. are also known as Yooperlite. Credit: Courtesy photo The 77th Greater Detroit Gem, Mineral & Fossil Show is ...
These “Yooperlite” rocks, found near Lake Superior in Michigan, fluoresce like sparkling lava when they’re hit with ultraviolet light. In 2017, gem and mineral dealer Erik Rintamaki stumbled upon ...
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