mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to translucent milky white; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Opaque white to translucent milky white
Luster: Vitreous to greasy

Identified May 6, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions in veins or as a primary constituent of igneous rocks like granite. The milky appearance is caused by microscopic fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glass making, ceramics, as an abrasive, in landscaping, jewelry (tumbled stones), and as a gemstone for metaphysical or decorative collections.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. While often overlooked for clearer varieties, some milky quartz contains traces of gold within its veins in certain geological regions.

Field identification & locations

Identified in the field by its white color, inability to be scratched by steel, and lack of cleavage (breaks like glass). It is found worldwide, with significant deposits in Brazil, USA (Arkansas/NC), and the Alps.