It is no secret that you can do all kinds of fun experiments with UV lights. With a short-wave and long-wave UV flashlight, you can make fluorescent mineral rocks glow in all kinds of colors. This kit has a pound of mineral rocks and a UV flashlight with dual modes to make them glow.
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Fluorescent Mineral Rocks Glowing Under UV Light -- Gadgetify
You can try these UV flashlights on Diopside, Norbergite, Wollastonite, Franklinite, Fluorapatite, Willemite, Calcite, Sphalerite, Cleiophane, Franklinite, Chlorophane, and many other rocks. They can be found on sites like eBay.
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