Fluorite (Var: Chlorophane)

Locality: Badu Hill pegmatite, Llano, Llano Co., Texas, USA

Note: The mineral species Chlorophane is not listed in our database for this locality. This specimen may be misidentified or the mindat list of minerals at this locality may be incomplete.

Thermoluminescent fluorite (chlorophane) emitting blue-green light when heated to 220°C in a porcelain dish atop a laboratory hot plate. The magenta color is the result of a second red emission line at the higher temperature (330°C) at the center of the dish where it contacts the hotplate. This dark purple fluorite is completely decolorized after it ceases luminescing.

This Photo was Mindat.org Photo of the Day - 5th Feb 2010

This photo has been shown 2582 times

Photo added: 21st Dec 2006

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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