Piece laid down flat on printed paper showing a clear image of what is underneath

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1. Felix (fesix@chaos.social)'s status on Tuesday, 05-Nov-2024 07:05:56 JST Felix

   Have you heard of a mineral called Ulexite?
   The block itself has quite an interesting structure and looks translucent when polished but if you lay it down on a surface you suddenly can see a clear picture from what is underneath!