mineral
Microcline Feldspar
KAlSi3O8
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale. Colors range from white, cream, yellow, to pink or green (Amazonite). Luster is vitreous to pearly. Crystal system is triclinic, often showing distinctive twinning. Good cleavage in two directions at nearly right angles.
Identified More mineral →
Explore Microcline 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. Colors range from white, cream, yellow, to pink or green (Amazonite). Luster is vitreous to pearly. Crystal system is triclinic, often showing distinctive twinning. Good cleavage in two directions at nearly right angles.
Formation & geological history
Forms primarily in felsic igneous rocks like granite and pegmatites through the slow cooling of magma, as well as in metamorphic environments.
Uses & applications
Widely used in the manufacture of ceramics, porcelain, glass, and as a gemstone or ornamental carving material.
Geological facts
Microcline is the most common potassium feldspar. When it contains lead impurities and has a bright green color, it is known as Amazonite. It commonly exhibits perthitic texture, which is an intergrowth of two different feldspars.
Field identification & locations
Identified in the field by its blocky crystal habit, near-right angle cleavage, and distinct grid-like twinning pattern (often visible under magnification). Found worldwide in pegmatite-rich regions.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary