mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White to cloudy translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 (Mohs scale)
Color: White to cloudy translucent
Luster: Vitreous to greasy

Identified May 17, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White to cloudy translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Formation & geological history

Formed from the crystallization of silica-rich magma or precipitation from hydrothermal fluids in veins. Milky quartz gets its appearance from microscopic inclusions of fluids trapped during crystal growth.

Uses & applications

Used in glass making, abrasive materials, electronics as a source of silicon, and as a decorative stone in landscaping or jewelry.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often found in massive veins and can sometimes contain gold or other precious metals.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and white cloudy appearance. It is ubiquitous in mountainous regions and riverbeds globally.