Fluorescent Gypsum or Selenite photographed under Canvas Print
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ImageID: 42-23929245 / Mark Schneider / Visuals Unlimited/Corbis / Fluorescent Gypsum or Selenite photographed under short-wave ultraviolet light
ImageID: 42-23929245 / Mark Schneider / Visuals Unlimited/Corbis / Fluorescent Gypsum or Selenite photographed under short-wave ultraviolet light