Peach Feldspar
Potassium Feldspar var. Orthoclase / Microcline · Mineral Specimen and Semi-Precious Ornamental Stone
Crystal System
Monoclinic or Triclinic, typically forming blocky, tabular, or massive habits with prominent cleavage planes.
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
KAlSi3O8
Formation Process
Igneous and pegmatitic crystallization from cooling magma rich in silica, potassium, and aluminum under high temperature and pressure conditions.
About This Crystal
A blocky, chunky raw mineral specimen exhibiting a soft peach to salmon pink coloration. It has an opaque to translucent appearance with a vitreous to pearly luster on cleavage faces, displaying typical uneven fractures and stepped cleavage steps.
Physical Characteristics
Color is peach-pink; streak is white; distinct cleavage in two directions at or near 90 degrees; fracture is uneven to conchoidal; specific gravity is approximately 2.56; brittle tenacity.
Optical Properties
Biaxial optic sign with low birefringence; refractive indices range between 1.518 and 1.539; generally exhibits no strong pleochroism in massive forms.
Hardness & Durability
Origin Region
Global distribution including Madagascar, USA (Colorado), Brazil, India, and Norway. Forms in pegmatites and granitic rocks.
Hardness & Durability
Mohs hardness of 6; fair to good cleavage makes it susceptible to splitting upon hard impacts; moderate durability suitable for low-impact jewelry if protected.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemical cleaners, ultrasonic cleaners, and sudden extreme temperature shocks.
Rarity & Value
Common; widely available globally as mineral specimens and tumbling rough; generally very affordable with value depending on color intensity and size.
Special Characteristics
May exhibit weak blue or white fluorescence under shortwave UV light in certain specimen varieties due to trace impurities.
Lore & History
Historically used as a decorative ornamental material; in modern metaphysical practices, peach feldspar is associated with emotional healing, soothing the heart chakra, and boosting self-worth, though these are traditional beliefs rather than scientific claims.