mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to opaque; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

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

Identified June 2, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to opaque; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in hydrothermal veins, pegmatites, and as a primary constituent of many igneous rocks like granite. Often found in gold-bearing veins and as grains in sedimentary rocks.

Uses & applications

Used in glassmaking, abrasives, electronics (piezoelectric properties), jewelry, and as a decorative stone in landscaping.

Geological facts

Milky quartz is one of the most common minerals in the Earth's crust. Its cloudy appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Field identification & locations

Identify by its hardness (scratches glass), white color, and lack of cleavage. It is found globally in mountainous regions, riverbeds, and quartz veins within bedrock.