mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: White to off-white
Luster: Vitreous to greasy

Identified July 9, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in hydrothermal veins or as a constituent of igneous rocks like granite. Its milky appearance is caused by tiny fluid inclusions of gas and/or liquid trapped during crystal growth.

Uses & applications

Used in the glass and ceramics industry, as an abrasive, in landscaping, and sometimes as a minor gemstone or for metaphysical collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz.

Field identification & locations

Identified in the field by its hardness (scratches glass), lack of cleavage, and white color. Commonly found in riverbeds, gravel pits, and mountainous regions worldwide.