Colors with Undefined Names 24. Feldspar Color 351 - #FDD5B1
Feldspars are a group of rock-forming tectosilicate minerals that make up as
much as 60% of the Earth's crust.
Feldspars crystallize from magma in both intrusive and extrusive igneous rocks,
as veins, and are also present in many types of metamorphic rock. Rock formed
almost entirely of calcic plagioclase feldspar (see below) is known as
anorthosite. Feldspars are also found in many types of sedimentary rock.
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Feldspar crystal (18×21×8.5 cm) from Jequitinhonha valley, Minas Gerais, Southeastern Brazil. | |
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