Chemical Formula:See agate
Status: NON APPR
Crystal System: Polycrystalline
Mineral for Display: No
|Short Waves (254 nm): || Green |
Phosphorescence (in the common meaning of the term) seen by naked eye:
Main Activator(s) and spectrum:
Most Common Activator: (UO2)2+ (Uranyl ion) as impurities
No spectrum for the moment
Comments on activators and spectra:
Luminescence probably due to uranium ions present in the chalcedony.
Best Locality for luminescence(*):
- Barstow, CA, USA (variety of chalcedony fluo green SW also called Siam agate or chapinite, a mixture of agate and jasper not the mineral crawfordite);
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
Bibliographical Reference for luminescence:
- 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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