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Elisha M. Shemang, Botswana; Dept. of Geology, University of Botswana.
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Date:
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Friday January 11th 2008
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Comments:
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Mineral color in quarz is due to impurities of rutile, Tourmaline or Fe-Oxides intergrown
with the quartz crystal. Additionally, gas and liquid bubbles trapped during crystallization reduce
transparency.
