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Physical Environment > Quartz |
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This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
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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Physical Environment > Quartz |
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