Milky Quartz

Physical Properties

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

Formation & Geological History

Formed through the cooling of silica-rich magma or precipitation from hydrothermal fluids. The milky appearance is caused by tiny fluid inclusions (gas or liquid bubbles) trapped during crystal growth.

Uses & Applications

Used as a source of silicon for glassmaking and electronics, in construction as aggregate, and as decorative landscaping stones or metaphysical crystals.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz found in nature, often appearing in massive veins that cut through other rocks.

Field Identification & Locations

Identify in the field by its hardness (will scratch glass), cloudy white appearance, and lack of cleavage. Commonly found in mountain ranges, stream beds, and pegmatite veins worldwide.

Identified on: 4/19/2026

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