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3D3DFluorite Crystals.
The tag that came with sample reads as follows:
Fluorite Crystals, Kendall Mtn. near Silverton, San Juan County, Colorado.
This specimen was found in the steep section of tailings of an abandoned mine. These crystals fluoresce a nice vibrant powder blue or purplish blue in 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