White Quartz
Quartz (variety Milky Quartz) · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Trigonal, typically tumbling or massive habit for tumbled stones
Mineral Group
Silicate, specifically Tectosilicate
Chemical Formula
SiO2
Formation Process
Igneous, metamorphic, and hydrothermal processes from cooling silica-rich fluids
About This Crystal
A smooth, tumbled white to milky translucent quartz pebble showing subtle internal fractures, minor iron oxide surface staining, and a vitreous to greasy luster typical of tumbled stones.
Physical Characteristics
Color is milky white with translucent areas; white streak; conchoidal fracture; no true cleavage; specific gravity around 2.65; brittle tenacity.
Optical Properties
Uniaxial positive, doubly refractive, refractive index of 1.544 to 1.553, typically exhibits no pleochroism due to colorlessness or uniform milky appearance.
Hardness & Durability
Origin Region
Worldwide, extensively mined in Brazil, Madagascar, USA, and the Alps
Hardness & Durability
Mohs hardness of 7, good durability, suitable for everyday jewelry wear although internal fractures can be vulnerable to hard impacts.
Care & Maintenance
Safe to clean with warm soapy water and soft brush; avoid harsh acids like hydrofluoric acid; ultrasonic cleaners are generally safe if free of extreme fractures.
Rarity & Value
Very common, inexpensive, and widely available globally; value is very low for tumbled specimens unless exceptionally clear or part of unique lapidary art.
Special Characteristics
Often contains microscopic fluid inclusions or gas bubbles that cause the milky-white appearance, along with piezoelectric properties.
Lore & History
Historically used across many ancient cultures for tools and ornaments; in modern metaphysical practices, it is regarded as a master healer stone associated with clarity and the crown chakra.