Milky Quartz

Physical Properties

Hardness: 7.0 on Mohs scale; Color: Cloudy white to semi-transparent; 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 solutions or cooling magma. Milky quartz gets its appearance from tiny fluid microscopic inclusions of gas or liquid trapped during crystal growth.

Uses & Applications

Used in glass manufacturing, electronics (due to piezoelectric properties), construction as an aggregate, and in landscaping or as a gemstone for jewelry and spiritual practices.

Geological Facts

Milky quartz is the most common variety of crystalline quartz. While often overlooked for clearer varieties, large masses form some of the most prominent white veins in mountain ranges globally.

Field Identification & Locations

Identify by its ability to scratch glass, non-metallic luster, and cloudy appearance. Commonly found in riverbeds, mountain outcrops, and near gold-bearing veins. Collectors should look for unique shapes or associations with other minerals.

Identified on: 5/2/2026

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