Fluorescent minerals and rocks are quite fun to study. They glow under UV light. You are going to need the right kind of flashlight to see this effect though. The Way Too Cool CONVOY C8+ flashlight can help. It is a 365nm LW UV Flashlight that runs on 18650 Li-Ion batteries.
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The flashlight doesn’t run too hot and makes fluorescent minerals and rocks look trippy in the dark.
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