mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Identified June 15, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed from the crystallization of silica-rich hydrothermal fluids in veins or as a late-stage mineral in igneous pegmatites. This specimen appears water-worn, likely tumbled in a river or glacial deposit.

Uses & applications

Used in glassmaking, abrasives, electronics (piezoelectric properties), and as decorative landscaping stone or low-cost collector specimens.

Geological facts

The white milky appearance is caused by millions of tiny microscopic inclusions of gas or liquid trapped during the crystal's formation. It is the most common variety of crystalline quartz.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and white 'cloudy' appearance. It is found globally in almost all geological environments, especially in mountain ranges and riverbeds.