mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, typically white, pink, or beige in color with a vitreous to pearly luster. It exhibits monoclinic or triclinic crystal systems and two directions of good cleavage at roughly 90 degrees.
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Physical properties
Hardness of 6 on the Mohs scale, typically white, pink, or beige in color with a vitreous to pearly luster. It exhibits monoclinic or triclinic crystal systems and two directions of good cleavage at roughly 90 degrees.
Formation & geological history
Forms primarily through the crystallization of magma in igneous rocks like granite and pegmatite, as well as in metamorphic and sedimentary environments.
Uses & applications
Widely used in the manufacture of glass, ceramics, pottery glazes, and as a flux in metallurgy.
Geological facts
Feldspar is the most abundant mineral group in the Earth's crust, making up about 60% of terrestrial rocks. It is also found in rocks on the Moon and in Martian meteorites.
Field identification & locations
Readily identified in the field by its distinct rectangular crystal shape, characteristic blocky cleavage, and lighter color palette. Commonly sourced globally from pegmatite deposits and granite quarries.
