Quartz crystal

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Quartz crystal (from German Quarz) is the second most abundant mineral in the Earth's continental crust (after feldspar). It is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2.

Quartz crystal (from German Quarz) is the second most abundant mineral in the Earth's continental crust (after feldspar). It is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2.

[edit] Also See:

• Freestyle Timing Booklet
• Data Service Requirements World Cup
• Freestyle Equipment List
• Clockwork mechanisms

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