At the Maui Ocean Center in Malaea… Not to be missed: fluorescing coral! Quite a few species appear to fluoresce in long wave UV. Strictly speaking they’re not minerals yet, but they could be found as such in a few eons.
Can you use a mineral to test your UV flashlight? 365nm vs 395nm
How do you know whether your UV flashlight is really producing the wavelength it claims? You could use a spectrometer, of course, but...


