mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to opaque; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to opaque
Luster: Vitreous to greasy

Identified June 3, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to opaque; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms primarily in hydrothermal veins and pegmatites. The milky appearance is caused by tiny inclusions of gas and liquid trapped during crystal growth.

Uses & applications

Used in electronics for its piezoelectric properties, glass manufacturing, as an abrasive, and frequently in jewelry or as decorative landscaping stones.

Geological facts

Milky quartz is one of the most common minerals on Earth. Its signature white color is actually due to microscopic bubbles from more than 2 billion years of geological activity.

Field identification & locations

Identify by its hardness (will scratch glass), lack of cleavage, and white opaque color. It is commonly found in riverbeds, mountains, and widespread worldwide.