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Fluorescent Sodalite in Syenite collected on a Lake Michigan beach, Image Credit: Angie Hartley
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A young rockhound holds a nice specimen of Fluorescent Sodalite Syenite rescued from the waves on a Lake Michigan beach. This rock is a nondescript gray in normal light, but longwave ultraviolet light brings out the characteristic bright orange. Hunting for these in after sunset has become a popular hobby in many Great Lakes areas.
Image credit: Angie Hartley