mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: White to translucent
Luster: Vitreous to greasy

Identified July 10, 2026More mineral →

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Physical properties

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

Formation & geological history

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

Uses & applications

Used as an abrasive in sandpaper, in glassmaking, as a gemstone in cabochons, and widely in the gemstone and metaphysical collecting communities.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often found in massive form rather than distinct crystals, frequently appearing as the 'white veins' seen in mountain ranges.

Field identification & locations

Identify in the field by its distinct white color, inability to be scratched by a steel knife, and grease-like luster on fractured surfaces. Found globally in almost all geological environments.