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 April 28, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the crystallization of silica-rich magma or from hydrothermal veins. It is found in igneous, metamorphic, and sedimentary environments across all geological ages.

Uses & applications

Used in glass manufacturing, electronics (piezoelectric properties), abrasives, as a flux in metallurgy, and widely in jewelry and home decor as a gemstone.

Geological facts

Milky quartz gets its white, cloudy appearance from tiny fluid inclusions of gas or liquid trapped during crystal growth. It is one of the most abundant minerals in Earth's crust.

Field identification & locations

Identify in the field by its hardness (it scratches glass easily), absence of cleavage, and white waxy look. It is found globally, often as veins in granite or as pebbles in riverbeds.