These palm to hand sized specimens are some of the brightest I’ve seen. They rival the Langban Sweden specimens for brightness.
- selenite – green
- calcite – blue short wave
- calcite – violet pink long wave
The Challenger Cave calcite from Nuevo Leon, changes color under different wavelengths. And it is extremely phosphorescent. It has the brightest phosphorescent of any mineral I’ve seen, glowing a bright blue white for several minutes.