mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Opaque white to translucent
Luster: Vitreous to greasy

Identified March 14, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Opaque white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. This specimen shows signs of being water-worn or mechanically tumbled, creating its smooth, rounded surface. It can be found in geological formations ranging from billions of years old to relatively recent deposits.

Uses & applications

Used widely in glassmaking, abrasives, and as a source of silicon for electronics. In its tumbled form, it is popular for decorative landscaping, aquariums, and metaphisical collecting.

Geological facts

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

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage planes. It is ubiquitous globally, commonly found in riverbeds, beaches, and mountain trails. For collectors, look for high translucency or unique internal phantoms.