Would I need to use a special film to photograph minerals under a short/longwave blacklight?

A good question, I don't know, but have some thoughts on the subject. Blacklight is ultraviolet and outside the range of human vision, but the light given off of the minerals is fluorescent and visable to your eye and should show up on ordinary film. I would expect the color balance to be off and would require a long exposure time. If you give it a try I would be interested in the results. Good luck. the F.O.G.