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 May 13, 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 from silica-rich hydrothermal fluids cooling in veins or from the crystallization of pegmatites. It is the most common variety of crystalline quartz.

Uses & applications

Used in electronics as a source of high-purity silica, as an abrasive, in glassmaking, and frequently in decorative landscaping or as affordable collector specimens.

Geological facts

The milky white color is caused by tiny inclusions of gas or liquid trapped during the crystal's growth. It is often found associated with gold in hydrothermal veins.

Field identification & locations

Identify in the field by its hardness (will scratch glass easily), lack of cleavage, and white color. It is omnipresent in granite-rich terrains and riverbeds globally.