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I have been searching certain fluorescent minerals, such as Andersonite, and all websites are saying how the mineral will glow if exposed to Ultraviolet light. Does enough ultraviolet light come … through the atmosphere (from the sun), to make any natural minerals actually glow, and to keep glowing for a time if the light was removed? If there is not enough UV light, or if no such mineral exists, would it be possible for such a mineral to exist? …
asked Oct 20 '14 by SuperHuman