mineral

Milky Quartz

Quartz / Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White to translucent; Luster: Vitreous/waxy; Crystal System: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White to translucent
Luster: Vitreous/waxy

Identified April 25, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White to translucent; Luster: Vitreous/waxy; Crystal System: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed through the crystallization of silica-rich magma or from hydrothermal veins. The milky appearance is caused by tiny inclusions of gas and/or liquid trapped during crystal growth.

Uses & applications

Used in the gemstone industry for decorative carvings, towers, and jewelry. Used industrially as a source of silicon for electronics and abrasive materials.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is clear; it only becomes 'Milky Quartz' when microscopic fluid inclusions scatter light.

Field identification & locations

Identify in the field by its hardness (scratches glass), white color, and lack of cleavage. Commonly found in pegmatite veins and metamorphic rocks globally.