mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

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

Identified March 11, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed from the crystallization of silica-rich hydrothermal fluids or cooling magma. The white 'milky' appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, abrasives, electronics (piezoelectric properties), and as decorative landscaping stone or semi-precious gemstones.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often found in gold-bearing veins, making it a primary indicator for gold prospectors.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), its white 'sugar' or 'frozen' look, and its lack of cleavage. Commonly found in mountains, riverbeds, and as veins within granite.