These common fluorescent minerals are sensitive to long-wave ultraviolet (UVA) light and can be made to fluoresce using any of the fluorescent “black lights” we carry. Fluorescence is sometimes used to identify certain minerals and can change some rather ordinary looking rocks into marvels of colors and light. Once your students see these samples, they will be eager to test all of the rocks they find. An uncommon and totally cool addition to any mineral unit your students won’t soon forget. Don’t forget to check out our line of UV lights. Includes five rocks.