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.
Categories
- Earth Magnetism & Rock Physics (345)
- Field (2822)
- Geochemistry, Mineralogy, Petrology & Volcanology (901)
Location
- North America (751)
- Northern America (588)
- United States of America (391)
- Exact location (-92.2412 W, 34.8520 N)
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Colours
Image properties
3072 × 2304 px;
image/jpeg; 3.3 MB
Camera:
Panasonic Lumix DMC-FZ8
Taken on 15
October
2010
Submitted on 7 January 2011
Licence
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
Credit
Konstantinos Kourtidis (distributed via imaggeo.egu.eu)
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