mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: White to translucent/cloudy, Luster: Vitreous to greasy, Crystal structure: Trigonal (often massive), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified July 19, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: White to translucent/cloudy, Luster: Vitreous to greasy, Crystal structure: Trigonal (often massive), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Formed from the crystallization of silica-rich solutions in hydrothermal veins and pegmatites. The milky white color is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in the production of glass, ceramics, and electronics (as a source of silicon). Also popular for landscaping, lapidary work, and as a healing stone in metaphysical communities.

Geological facts

Milky quartz is the most common variety of crystalline quartz. Historically, it was used with flint to create sparks for starting fires.

Field identification & locations

Identify in the field by its hardness (will scratch glass), cloudy white appearance, and lack of cleavage (breaks like glass). It is abundantly found in mountainous regions worldwide.