mineral
Kfeldspar
Potassium feldspar (KAlSi3O8)
AI-generated identification · may be incorrectMohs hardness of 6; pink to salmon-red color; vitreous to pearly luster; monoclinic or triclinic crystal system; two directions of good cleavage at nearly 90 degrees.
Identified More mineral →
Explore Kfeldspar in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness of 6; pink to salmon-red color; vitreous to pearly luster; monoclinic or triclinic crystal system; two directions of good cleavage at nearly 90 degrees.
Formation & geological history
Forms primarily through the slow cooling of felsic magmas in intrusive igneous environments like granites and pegmatites.
Uses & applications
Widely used in the manufacturing of ceramics, glass, and porcelain, as well as an abrasive and in gemstone carving.
Geological facts
Feldspars are the single most abundant mineral group in the Earth's crust, comprising roughly 41 percent of it.
Field identification & locations
Identified by its distinctive pink color and rectangular cleavage planes; commonly found in granitic pegmatites worldwide.
