mineral

Milky Quartz

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 July 3, 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

Formed through the cooling of silica-rich magma or precipitation from hydrothermal veins. The milky appearance is caused by tiny inclusions of gas or liquid reaching back to the time of crystal formation.

Uses & applications

Used in glassmaking, abrasives, electronics (due to piezoelectric properties), and as decorative landscaping stone or metaphysical specimens.

Geological facts

Quartz is one of the most abundant minerals in the Earth's crust. Milky quartz is the most common variety of crystalline quartz found in nature, often appearing in massive veins.

Field identification & locations

Identify by its hardness (will scratch glass), lack of cleavage, and white streaky appearance. It is commonly found in gravel pits, riverbeds, and as vein material in mountains globally.