mineral

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

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

Identified June 25, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms primarily in hydrothermal veins and pegmatites through the cooling and crystallization of silica-rich hydrothermal fluids. It is found in various geological ages from Precambrian to recent.

Uses & applications

Used in glass manufacturing, abrasive production, ceramics, and as a landscaping stone. Occasional use in jewelry or as pocket stones in the metaphysical community.

Geological facts

The 'milky' appearance is caused by tiny inclusions of liquid, gas, or both, trapped within the crystal as it grew. It is one of the most common minerals on Earth's crust.

Field identification & locations

Identify in the field by its hardness (will scratch glass), white color, and lack of cleavage. Commonly found in riverbeds, beaches, and eroded mountainous regions globally.