Chemical Formula:See CALCITE
Mineral for Display: No
|Long Waves (365nm): || Yellowish White ||Short Waves (254 nm): || Yellowish White |
Phosphorescence (in the common meaning of the term) seen by naked eye:
|Long Wave (365nm): ||Pale Yellow ||Short Waves (254 nm): ||Pale Yellow |
Petoskey stone was designated the state rock of Michigan in 1965. It is a fossilised (calcite) coral from Devonian (350my ago) - Hexagonaria Percarinata.
Named after an Ottawa Indian Chief, Chief Pet-O-Sega.
Main Activator(s) and spectrum:
Best Locality for luminescence(*):
- Petoskey, Emmet Co., Michigan, USA;
(*)Data are not exhaustive and are limited to the most important localities for fluorescence
Bibliographical Reference for luminescence:
Luminescence Reference on internet:
Mineralogical Reference on internet:
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