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Gypsum


Gypsum : Ca[SO4] · 2H2O

Photo Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Willow Creek, Nanton, Alberta, Canada
This is a complete, gemmy floater crystal of gypsum from Canada, and the label mentions a "Fluorescent hourglass zone" - meaning that apparently there is an inclusion or growth anomaly inside that glows under UV. At any rate, it is a fine, sharp crystal! 5.7 x 2.7 x 2.4cm

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