Smoke quartz
by Konstantinos Kourtidis, Demokritus University of Thrace, Xanthi, Greece
The Smoke quartz chemical formula is SiO2. The crystal system is trigonal. Smoke quartz orginates from colorless quartz, that changes colour because of exposure to radioactivity. The one in the photo, found near Little Rock, has been artificially exposed.
Taken on 15
October
2010
Submitted on 7 Jan 2011
Categories
- Earth Magnetism & Rock Physics (343)
- Field (2746)
- Geochemistry, Mineralogy, Petrology & Volcanology (856)
Location
- North America (734)
- Northern America (576)
- United States of America (386)
- Exact location (-92.2412 W, 34.8520 N)
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Camera:
Panasonic Lumix DMC-FZ8
Licence
Credit: Konstantinos Kourtidis (distributed via imaggeo.egu.eu)
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