+Quartz is a hard, crystalline [Mineral](/wiki/mineral) composed of [Silica](/wiki/silica). It is one of the most abundant minerals on Earth, found in various forms and colors, from clear to amethyst. This ubiquitous [Crystal](/wiki/crystal) is valued for its beauty and many industrial uses.
+## See also
+- [Rock](/wiki/rock)
+- [Gemstone](/wiki/gemstone)
+- [Geology](/wiki/geology)
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