Milky Quartz with Mica inclusions

Physical Properties

Hardness: 7 (Mohs scale), Color: White to translucent (milky), 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 precipitation from hydrothermal veins. Often associated with pegmatites and metamorphic environments.

Uses & Applications

Used in glass manufacturing, electronics (piezoelectric properties), jewelry (gemstones), and as a landscaping or construction material.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. The 'milky' appearance is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.

Field Identification & Locations

Identify by its hardness (scratches glass), lack of cleavage, and white cloudy appearance. Common in granite outcrops and creek beds worldwide.

Identified on: 4/20/2026

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