mineral

Milk Quartz (Snow Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Cloudy white to milky; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

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

Identified July 12, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Cloudy white to milky; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed from the crystallization of silica-rich hydrothermal fluids or within igneous pegmatites. The milky appearance is caused by minute fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glass manufacturing, as an abrasive, in landscaping/decor, and sometimes as a minor gemstone for beads and carvings.

Geological facts

Milk quartz is the most common variety of crystalline quartz. While often overlooked by collectors in favor of clear rock crystal, it contains tiny bubbles that act as a geological 'time capsule' of the fluids present during its formation.

Field identification & locations

Identified by its white color and ability to scratch glass. Found globally in quartz veins and as a primary constituent in granite. Collectors look for pieces with interesting massing or associated minerals.