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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Q
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Quartz
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INFOTEXT
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1992-09-02
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236b
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8 lines
A quartz is a crystalline form of silica
(SiO2), one of the most abundant minerals of
the Earth's crust (12% by volume). Quartz
occurs in many different kinds of rock,
including sandstone and granite.
Subject by: Andrew Longhorn