Banded Fluorite.  
The tag that came with sample reads as follows:Banded Fluorite, Sierra County, New Mexico 
This specimen was found in the steep section of tailings of an abandoned mine.  Also included with some specimens are quartz, barite, granite and/or jasper.  It fluoresces a nice vibrant purplish blue in both short & long wave ultra-violet light. I traded this sample for a few of my strange copper nodules. 
Source: Calvin Webb 
Contributor: Calvin Webb 
Acquired: 1 September, 2003 
Price: Donated 
Size: 1" 
Composition: CaF2
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