mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to opaque white; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal (hexagonal prisms); Cleavage: None; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to opaque white
Luster: Vitreous (glassy) to greasy

Identified April 4, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to opaque white; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal (hexagonal prisms); Cleavage: None; Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. The milky color is caused by tiny gas or liquid inclusions trapped during crystal growth. They are found across all geological ages.

Uses & applications

Commonly used in jewelry as cabochons, decorative carvings, and in industrial applications for glassmaking, abrasives, and electronics due to its piezoelectric properties.

Geological facts

Milky quartz is the most common variety of crystalline quartz. While often overlooked for clearer varieties, large specimens are frequently used in holistic healing practices and as ornamental garden stones.

Field identification & locations

Identify by its hardness (will scratch glass), lack of cleavage, and conchoidal (shell-like) fracture. It is ubiquitous worldwide, especially in metamorphic terrains and mountain ranges.