mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 Mohs; Color: White to cloudy translucent; Luster: Vitreous/Greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 Mohs
Color: White to cloudy translucent
Luster: Vitreous/Greasy

Identified July 18, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: White to cloudy translucent; Luster: Vitreous/Greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in hydrothermal veins or as a late-stage crystallization in igneous rocks like granite. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in electronics as a source of silicon, as an abrasive, in glassmaking, and commonly used in landscaping or as healing crystals in the metaphysical community.

Geological facts

Milky quartz is the most common variety of crystalline quartz. It is often found in large veins that can be several meters thick and can serve as a host rock for gold deposits.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and white cloudy appearance. It is found globally across all continents in virtually all geological environments.