Collecting Fluorescent Minerals - The Basics, Where to Find Them, and How to Collect Them
Rock collecting is a pretty easy hobby to get into - buy a hammer, find a pile of rocks, and you're rock collecting.
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Deep, pink-purple hexagonal crystals of corundum (var. ruby) on gray matrix, from an unidentified mine in Mysore, India. Under long wave UV the ruby crystals fluoresce an intense red color and the matrix shows a pale blue/white response.