Milky Quartz
Quartz (var. Milky Quartz) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal (Hexagonal scalenohedral); typically occurs as massive, tumbled, or prismatic crystals.
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2
Formation Process
Primarily Hydrothermal or Igneous. It forms as silica-rich fluids cool, with its opacity caused by microscopic fluid inclusions trapped during growth.
About This Crystal
Opaque to translucent white colored quartz with a vitreous to greasy luster. This specific specimen is a tumbled stone with a smooth, rounded surface and a cloudy, 'milky' interior.
Physical Characteristics
Color: White to off-white; Streak: White; Cleavage: None (indistinct); Fracture: Conchoidal; Specific Gravity: 2.65; Fluorescence: Usually inert.
Optical Properties
Refractive Index: 1.544-1.553; Birefringence: 0.009 (Uniaxial positive); No pleochroism; Typically displays a soft, diffused glow under strong light.
Hardness & Durability
Origin Region
Found globally; major deposits in Brazil, USA, Madagascar, and the Alps. Occurs in pegmatites and hydrothermal veins.
Hardness & Durability
Mohs Hardness: 7; Toughness: Good (no cleavage); Very stable and durable for all types of jewelry.
Care & Maintenance
Safe to clean with warm soapy water, ultrasonic cleaners, and steam. Generally resistant to most household chemicals and sunlight.
Rarity & Value
Common; very inexpensive. Value is based on size and polish quality. Rarely treated as its natural color is already ubiquitous.
Special Characteristics
Characterized by microscopic inclusion of gas or liquid (fluid inclusions) which scatter light to create the white, milky appearance.
Lore & History
Historically used in various cultures for tools and decorative items. In metaphysical traditions, it is often associated with the Crown Chakra and believed to represent clarity, purity, and slow, steady energy.