mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White to translucent; Luster: Vitreous to waxy; Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White to translucent
Luster: Vitreous to waxy

Identified June 30, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to translucent; Luster: Vitreous to waxy; Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Formed in hydrothermal veins or as a late-stage mineral in igneous intrusions. The white color is caused by microscopic inclusions of fluids trapped during crystal growth.

Uses & applications

Used in glass manufacturing, electronics due to piezoelectric properties, construction as an abrasive or aggregate, and in tumbled form for landscaping or decorative jewelry.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often the most common variety found by rockhounds due to its resistance to weathering.

Field identification & locations

Identify in the field by its hardness (can scratch glass but cannot be scratched by a steel nail), white cloudy appearance, and lack of cleavage planes. Found globally in almost all geological environments.