mineral
K-Feldspar (Potassium Feldspar / Pink Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
AI-generated identification · may be incorrectHardness: 6 on the Mohs scale. Color: Salmon pink, flesh-red, or brownish. Luster: Vitreous to pearly. Crystal structure: Monoclinic or triclinic. Cleavage: Two directions at or near 90 degrees. Specific gravity: 2.5 - 2.6.
- Hardness
- 6 on the Mohs scale
- Color
- Salmon pink, flesh-red, or brownish
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6 on the Mohs scale. Color: Salmon pink, flesh-red, or brownish. Luster: Vitreous to pearly. Crystal structure: Monoclinic or triclinic. Cleavage: Two directions at or near 90 degrees. Specific gravity: 2.5 - 2.6.
Formation & geological history
Forms in igneous rocks like granite and syenite from cooling magma, as well as in pegmatites and metamorphic gneisses.
Uses & applications
Used in the manufacture of ceramics, porcelain, glass, and as a gemstone or decorative specimen.
Geological facts
Feldspar is the single most common mineral group in the Earth's crust, making up about 41% of it.
Field identification & locations
Identified easily by its distinctive pink to salmon color and two cleavage planes meeting at roughly right angles. Found worldwide in granitic terrains.
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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