Chemical Formula: Ca3Mg(SiO4)2
Crystal System: Monoclinic
Mineral for Display: No
|Long Waves (365nm): || Orange ||Short Waves (254 nm): || Yellow |
Phosphorescence (in the common meaning of the term) seen by naked eye:
Manel Robbins says that luminescent color of material from the Crestmore Quarry is reported to have the same color as hardystonite therefore presumably dark purple to violet.
Main Activator(s) and spectrum:
Best Locality for luminescence(*):
- Commercial quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA;
- Velardeña, Velardeña District, Mun. de Cuencamé, Durango, Mexico (pale orange LW, cited by De Ment & Sterling Gleason, but no merwinite cited there in Mindat!);
(*)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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