mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: White to translucent, Luster: Vitreous to greasy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65

Identified April 27, 2026More mineral →

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Physical properties

Hardness: 7 (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 through the cooling of silica-rich magma or from hydrothermal veins. Milky quartz gets its opaque white color from tiny fluid or gas inclusions trapped during crystal growth.

Uses & applications

Used as an abrasive, in the production of glass, ceramics, and as a raw material for silicon semiconductors. Also used for decorative landscaping and as low-cost jewelry/gemstones.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust. Milky quartz is the most common variety of quartz found in nature.

Field identification & locations

Identify by its hardness (it can scratch glass), its white 'cloudy' appearance, and Lack of cleavage. It is ubiquitous in mountainous and igneous terrains worldwide.