mineral
K-Feldspar (Potassium Feldspar)
Microcline / Orthoclase (KAlSi3O8)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, typically salmon pink to reddish-orange color with a vitreous to pearly luster. Exhibits two directions of good cleavage meeting near 90 degrees.
Identified More mineral →
Explore K-Feldspar (Potassium 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 salmon pink to reddish-orange color with a vitreous to pearly luster. Exhibits two directions of good cleavage meeting near 90 degrees.
Formation & geological history
Forms commonly in igneous rocks like granite and pegmatites through slow cooling of magma, as well as in metamorphic gneisses.
Uses & applications
Used extensively in the manufacture of ceramics, porcelain, and glass, as well as an abrasive and gemstone.
Geological facts
Potassium feldspar is one of the most abundant mineral groups in the Earth's continental crust. Its distinct pink coloration is typically caused by microscopic hematite inclusions.
Field identification & locations
Identified easily by its characteristic pinkish hue, blocky crystal form, and 90-degree cleavage planes. Found globally in pegmatites and granitic terrains.
