mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, typically white, pink, or yellowish-brown in color, with a vitreous to pearly luster and distinct cleavage in two directions.
Identified More mineral →
Explore Feldspar in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6 on the Mohs scale, typically white, pink, or yellowish-brown in color, with a vitreous to pearly luster and distinct cleavage in two directions.
Formation & geological history
Forms primarily in igneous rocks like granite and pegmatites through the slow cooling of magma, 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, comprising roughly 41% of it.
Field identification & locations
Identified by its rectangular crystal habit, 90-degree cleavage angles, and Mohs hardness of 6; commonly found worldwide in pegmatite dikes and granite outcrops.
