mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: Opaque white to translucent
Luster: Vitreous (glassy) to greasy

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. Milky quartz specifically gets its appearance from microscopic fluid inclusions of gas or liquid trapped during crystal growth. They are found across all geological ages.

Uses & applications

Used in glassmaking, as an abrasive in sandblasting, in the production of silicon for electronics, as a decorative gemstone in jewelry (cabochons), and as landscaping stone.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of crystalline quartz. Historically, it has been used in various cultures for spiritual healing and as 'power stones'.

Field identification & locations

Identify by its ability to scratch glass, lack of cleavage, and characteristic 'milky' white opacity. It is found globally in pegmatites, veins, and as tumbled pebbles in riverbeds and beaches.