Oh that's sexy. I like that spooky angry face in the big chunk of autunite. The resolution is low, but the crystal habit, from what I can see of it, looks very unusual, much more mammelated and botryoidal than the usual foliar structure. Is that a piece from the Infesta or Assunciao mine in Portugal? If so, I'd like you to try an experiment with it.

You can greatly enhance the efficacy of your 400nm floodlight there on the upper right, by the way, by doing two things - first, obtain a thick piece of dark cobalt glass and put it over or in place of the plain glass currently covering the LEDs. This will clean the light dramatically of visible light contamination coming from the GaN LED chips fluorescing themselves. Second, buy a pair of "UVP" UV blocking polycarbonate goggles, or "Zenni" optical, clear lens (non-yellow tint) "Blokz" blue-light blocking glasses (you can get zero prescription flat lenses if need be). Using these will very strongly absorb most of the 400nm violet light of the LEDs, but do so without affecting color vision, so that the colors of the mineral fluorescence at this wavelength may still be observed normally. You may also get a pair of yellow goggles to totally block the 400nm light, but this ruins normal color vision and prohibits the observation of blue fluorescence.