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Bright multi-wave fluorescence and very phosphorescent, this terlingua-type calcite cleavage rhomb is from the famous Challenger cave Ð a series of caverns that have been a source for these clear calcite rhombs. This specimen displays a bright blueish-purple fluorescence under SW and a bright pink under LW. The animation below displays the nice phosphorescent.
First, an animation showing the difference between the UV flashlight we recommend (365nm filtered UV flashlight) versus unfiltered 395nm UV flashlights we see many folks carrying around at shows. So. much. visible purple light. We selected a bunch of rocks as a demonstration. Took pictures of them under his flashlight without the filter and then with the filter.
A major component of rock collecting (for us) is simply getting out in nature. A buddy dragged us out to a very remote area here in middle Tennessee to hunt for fluorescent green agate. Since we consider ourselves pure "Glow Hounds" we weren't anticipating any glow rocks, just the beauty of the area, but we brought our UV lights anyway.
