Petoskey Stone
Chemical Formula:See CALCITE
Status:
Mineral for Display: No
Luminescence:
UV Type |
Main color |
Intensity |
Observation Frequency |
|
| | | |
Long Waves (365nm): | Yellowish White | | | Short Waves (254 nm): | Yellowish White | | | | | | |
Phosphorescence (in the common meaning of the term) seen by naked eye:
UV Type |
Color |
Intensity |
Observation Frequency |
Long Wave (365nm): | Pale Yellow | | |
Short Waves (254 nm): | Pale Yellow | | |
Comments:
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:
No data
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:
http://www.mindat.org/show.php?name=Petoskey stone
http://webmineral.com/data/Petoskey stone.shtml
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