History of the Universe

History of the Universe eBook. 398 pages, 300 illustrations only $2.99

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Quartz

Quartz is a mineral consisting mostly of silica SiO. Quartz is normally transparent, but small quantities of other atoms added to the silica can color it violet (amethyst), yellow (citrine), black (morion) or other colors.

Quartz is the main constituent of light colored sand.

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History of the Universe eBook
History of the Universe eBook
Only $2.99

Written by Wyken Seagrave
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