Feldspar (likely Sunstone or Peach Aventurine/Feldspar variety)
Feldspar Group Mineral (Potassium Feldspar or Plagioclase) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Triclinic or Monoclinic, typically massive or tumbled in this form
Mineral Group
Silicates
Chemical Formula
KAlSi3O8 to (Na,Ca)(Si,Al)4O8
Formation Process
Igneous and pegmatitic crystallization from cooling magma, often found in intrusive igneous rocks
About This Crystal
A tumbled, smooth stone exhibiting a pale peach to orange-pink coloration with lighter white to creamy mottled patches and a vitreous to waxy luster when polished. It has translucent to opaque areas with internal cloudy patterns.
Physical Characteristics
Color ranges from peach, orange, to pinkish-white; white streak; two directions of good cleavage at or near 90 degrees; uneven to conchoidal fracture; specific gravity around 2.56-2.76; brittle tenacity
Optical Properties
Biaxial with low birefringence; refractive index ranges from 1.52 to 1.54; may exhibit aventurescence (glittering effect) if copper or hematite platelets are present
Hardness & Durability
Origin Region
Found globally; notable sources include India, Madagascar, Norway, and the USA
Hardness & Durability
Mohs hardness of 6 to 6.5; moderate durability, sensitive to sharp blows due to cleavage planes; suitable for pendants, earrings, and gentle wear jewelry
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemical cleaners, ultrasonic cleaners, and prolonged exposure to direct sunlight or sudden temperature changes
Rarity & Value
Common to Uncommon depending on the specific optical variety (e.g., Sunstone is rarer); generally affordable as tumbled stones ranging from low to moderate cost
Special Characteristics
Can display adularescence, schiller, or aventurescence depending on the specific feldspar variety and internal inclusions of tiny mineral platelets
Lore & History
Historically associated with vitality, leadership, and emotional warmth; often linked traditionally to the sacral and solar plexus chakras in crystal healing practices