mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 Mohs; Color: White/Translucent/Cloudy; Luster: Vitreous to greasy; Crystal: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 Mohs
Color: White/Translucent/Cloudy
Luster: Vitreous to greasy

Identified July 6, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: White/Translucent/Cloudy; Luster: Vitreous to greasy; Crystal: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments, typically through hydrothermal activity or as a primary mineral in pegmatites and granites.

Uses & applications

Used in glass manufacturing, electronics (piezoelectric properties), abrasives, and as decorative stone or landscaping material.

Geological facts

Milky quartz gets its cloudy appearance from tiny fluid or gas inclusions trapped during crystal growth. It is the most common variety of crystalline quartz found on Earth.

Field identification & locations

Identify by its hardness (ability to scratch glass), lack of cleavage, and characteristic waxy or milky appearance. Often found in quartz veins and stream beds.