mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 Mohs; Color: Opaque white to pale cream; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 Mohs
Color: Opaque white to pale cream
Luster: Vitreous to greasy

Identified July 4, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Opaque white to pale cream; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. The cloudy milky white color is caused by microscopic inclusions of fluids or gas trapped during crystal growth.

Uses & applications

Used in construction as aggregate, as a source of silica for glass and electronics, and as decorative stone or ornamental carvings.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. While often overlooked for clearer varieties, it can contain traces of gold in quartz vein deposits.

Field identification & locations

Identify in the field by its hardness (ability to scratch glass), its opaque white color, and its lack of cleavage. It is found globally in almost all geological environments.