Milky Quartz
Quartz var. Milky Quartz · Mineral Specimen and Semi-Precious Stone
Crystal System
Trigonal system, typically presenting as a massive, tumbled, or anhedral habit in tumbled stones.
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2
Formation Process
Hydrothermal and igneous processes, crystallizing from silica-rich fluids in veins and pegmatites at varying temperatures and pressures.
About This Crystal
A tumbled, whitish, translucent to opaque quartz pebble with a smooth, polished surface texture and a vitreous to greasy luster, containing microscopic fluid inclusions that cause its milky appearance.
Physical Characteristics
White to milky-white body color, white streak, no true cleavage, conchoidal fracture, specific gravity around 2.65, brittle tenacity, and displays piezoelectric properties.
Optical Properties
Uniaxial positive optical character, refractive index of 1.544 to 1.553, double refraction, and typically non-pleochroic due to its white/colorless nature.
Hardness & Durability
Origin Region
Found worldwide, with notable deposits in Brazil, Madagascar, the United States, and the Alps. Forms in diverse geological settings.
Hardness & Durability
Mohs hardness of 7, good durability and toughness, resistant to scratching by most common materials, and very stable chemically.
Care & Maintenance
Can be easily cleaned with warm soapy water and a soft cloth. Avoid harsh chemicals and sudden extreme thermal shock, though it is generally very durable.
Rarity & Value
Extremely common mineral worldwide, generally of low commercial value for tumbled specimens, widely used for ornamental and decorative purposes.
Special Characteristics
Contains numerous microscopic gas or liquid inclusions that scatter light, creating the characteristic milky-white opacity.
Lore & History
Historically used by various ancient cultures for tools, ornaments, and in traditional lore. In modern crystal healing, milky quartz is associated with clarity, purification, and the crown chakra, though these are cultural beliefs rather than scientific claims.