mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Hardness: 7 on Mohs scale
Color: Cloudy white to grayish
Luster: Vitreous to greasy

Identified March 23, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the cooling of magma or hydrothermal activity where silica-rich fluids precipitate in veins. Milky quartz specifically gets its appearance from microscopic fluid inclusions trapped during crystal growth.

Uses & applications

Used in glass manufacturing, electronics (due to piezoelectric properties), construction material (aggregate), and as semi-precious gemstones/metaphysical stones.

Geological facts

Milky quartz is the most common variety of crystalline quartz. The white cloudiness is caused by tiny bubbles of gas or liquid trapped within the crystal lattice as it grew millions of years ago.

Field identification & locations

Identify by its waxy/greasy luster and ability to scratch glass easily. It is found globally in pegmatites and hydrothermal veins. Collectors find it in riverbeds, mountains, and construction sites worldwide.