Chemical Formula: MgSO4 7H2O
Mineral for Display: No
|Long Waves (365nm): || Yellowish White ||Short Waves (254 nm): || Blue ||Weak|
Phosphorescence (in the common meaning of the term) seen by naked eye:
Main Activator(s) and spectrum:
Best Locality for luminescence(*):
- Death Valley, CA, USA;
- Vale, Oregon, USA (orange to yellow-white LW, nothing SW);
- Sterling Mine (Franklin), Ogdensburg, New Jersey, USA;
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
Bibliographical Reference for luminescence:
- The Henkel Glossary of Fluorescent Minerals, Dr. Gerhard Henkel, Published by the FMS, 1989 ,
- Fluorescence: Gems and Minerals Under Ultraviolet Light, Manuel Robbins, 1994, Geoscience Press, ISBN 0-945005-13-X ,
- Handbook of Fluorescent Gems and Minerals, a practical guide for the gem and mineral collector, Jack de Ment, 1949 ,
Mineralogical Reference on internet:
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