mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on the Mohs scale
Color: Milky white to opaque
Luster: Vitreous to greasy

Identified May 30, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed during the final stages of hydrothermal mineral crystallization in veins or pegmatites. The milky white color is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, abrasives, silicon production for electronics, and as decorative stone or landscaping gravel. High-quality specimens are used in jewelry and metaphysical collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz specifically is known for its 'foggy' appearance which distinguishes it from clear rock crystal.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and white waxy appearance. Commonly found in riverbeds, mountains, and as a component of granite.