+Feldspar is a vital group of rock-forming minerals, comprising over half of Earth's [crust](/wiki/crust). These common tectosilicates are fundamental to the formation of [igneous rocks](/wiki/igneous_rock), metamorphic rocks, and many sedimentary rocks, shaping planetary landscapes.
+## See also
+- [Mineral](/wiki/mineral)
+- [Rock](/wiki/rock)
+- [Geology](/wiki/geology)
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