mineral

Milky Quartz

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 June 19, 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 crystallization of silica-rich hydrothermal fluids in veins or as a primary constituent in igneous rocks like granite. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, as an abrasive, in the production of silicon, and commonly as decorative gravel or landscaping stone. Higher quality specimens are used for carvings and metaphysical collections.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz specifically gets its white color from microscopic 'fluid inclusions' trapped billions of years ago.

Field identification & locations

Identified by its ability to scratch glass, lack of cleavage, and characteristic waxy or vitreous luster. It is found globally in almost all geological environments and is a common find in stream beds and mountain outcrops.