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| nameorigin=[[Germany|German]] "Quarz".
}}
'''Quartz''' is the second most common [[mineral]] found on [[Earth]] being the primary component of [[sand]]. More accurately, known as silicon dioxide, quartz has a chemical composition of SiO<sub>2</sub> arranged in a repeating lattice forming [[hexagon]]al [[crystal]]s. Pure quartz is clear, but colored variations are created because of impurities in the crystal. Quartz is number 7 on the [[Mohs Hardness Scale]].
<br> Quartz is used in a number of applications; most commonly in [[glass]] making but also abrasives, electrical components or decorative gemstones especially if colored by impurities.
[[Category:Minerals]]
