Milky Quartz
Quartz var. Milky Quartz (alpha-quartz) · Mineral Specimen / Decorative Stone
Crystal System
Trigonal system; typically occurs in hexagonal prismatic habits with pyramidal terminations or in massive, macrocrystalline forms.
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
SiO2 (Silicon Dioxide) with fluid inclusions
Formation Process
Primarily Hydrothermal or Igneous. It forms from silica-rich solutions in veins or during the cooling of magma. The white color is caused by microscopic fluid inclusions trapped during growth.
About This Crystal
An opaque to translucent white variety of quartz. It exhibits a dull to vitreous luster on fresh surfaces, with a 'milky' or 'cloudy' appearance caused by millions of tiny gas or liquid bubbles.
Physical Characteristics
White to light gray color; white streak; no cleavage; conchoidal to uneven fracture; specific gravity of 2.65; usually non-fluorescent; brittle tenacity.
Optical Properties
Uniaxial positive; refractive index of 1.544–1.553; weakly birefringent; opaque to translucent; lacks significant pleochroism or dispersion.
Hardness & Durability
Origin Region
Globally abundant; notable sources include Brazil, USA (Arkansas), Madagascar, and the Alps. Found in pegmatites and hydrothermal veins.
Hardness & Durability
Mohs hardness of 7. It is very durable and tough due to lack of cleavage, making it highly resistant to mechanical wear.
Care & Maintenance
Safe to clean with warm soapy water, ultrasonic cleaners, and steam. It is chemically stable but should be stored away from extreme thermal shock.
Rarity & Value
Very common; low commercial value as a gemstone, predominantly valued for landscaping, industrial use, or as decorative mineral specimens.
Special Characteristics
Exhibits piezoelectricity (generates electric charge under pressure). May contain phantoms or inclusions of other minerals like hematite (visible as reddish spots).
Lore & History
Historically used for stone tools and ritual objects. In metaphysical lore, it is referred to as 'Snow Quartz' and is associated with clarity, neutrality, and the Crown Chakra.