mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky 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: Milky white to translucent
Luster: Vitreous to greasy

Identified July 8, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky 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 major constituent of igneous and metamorphic rocks. The white color is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glass manufacturing, electronics (due to piezoelectric properties), abrasives, and as decorative stone or gravel in landscaping.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz specifically is common in gold-bearing veins, often used by prospectors as an indicator mineral.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and white 'cloudy' appearance. It is found globally in almost every geological environment.