mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Identified April 13, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed from the cooling of silica-rich hydrothermal veins or within igneous pegmatites. It is one of the most common minerals in the Earth's crust, found in geological environments of almost any age.

Uses & applications

Used as a gemstone in carvings and jewelry, in the manufacturing of glass and ceramics, as an abrasive, and in the production of silicon chips and watches due to its piezoelectric properties.

Geological facts

The 'milky' appearance is caused by tiny fluid inclusions of gas or liquid trapped during the crystal's growth. It is the most common variety of crystalline quartz.

Field identification & locations

Identify in the field by its lack of cleavage, ability to scratch glass, and white, waxy appearance. It often appears as veins through darker country rock. Common globally.