Milky Quartz
Quartz var. Milky Quartz · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Trigonal, commonly occurs as tumbled or massive tumbled stones in commercial forms
Mineral Group
Silicates, specifically Tectosilicates
Chemical Formula
SiO2
Formation Process
Forms primarily through hydrothermal processes, cooling from silica-rich aqueous solutions at low to high temperatures, or crystallization in igneous pegmatites and metamorphic veins
About This Crystal
A tumbled, smooth, whitish to semi-translucent quartz specimen featuring a milky white body color with subtle yellowish iron-staining patches near the base. It has a rounded, polished, pebble-like shape and a vitreous to greasy luster, typical of tumbled decorative stones.
Physical Characteristics
Color is milky white with minor yellowish-brown surface tinges; streak is white; crystal cleavage is absent (indiscernible due to massive habit); fracture is conchoidal; specific gravity is approximately 2.65; tenacity is brittle; demonstrates piezoelectric and pyroelectric properties.
Optical Properties
Uniaxial positive; refractive index ranges from 1.544 to 1.553; birefringence is 0.009; typically translucent to opaque due to microscopic fluid and gas inclusions that scatter light; non-pleochroic.
Hardness & Durability
Origin Region
Worldwide, with significant deposits found in Brazil, Madagascar, the United States, and the Alps
Hardness & Durability
Mohs hardness of 7; good toughness and durability making it very suitable for general jewelry use and everyday wear, though thermal shock should be avoided.
Care & Maintenance
Safe to clean with warm soapy water and a soft brush; avoid harsh chemicals, hydrofluoric acid, and sudden extreme temperature changes. Can be stored easily alongside most stones due to its hardness of 7.
Rarity & Value
Very common and widely accessible worldwide; inexpensive and primarily valued for decorative purposes, lapidary arts, and metaphysical uses rather than high monetary gemstone value.
Special Characteristics
Contains numerous microscopic liquid and gaseous inclusions which create the signature milky-white appearance and scatter light; exhibits piezoelectricity.
Lore & History
Historically used across various ancient cultures for amulets, tools, and decorative items. In modern metaphysical practices, milky quartz is traditionally associated with clarity, emotional healing, and amplifying energy, often linked to the crown chakra.