mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Milky white to opaque; Luster: Vitreous to waxy (when smoothed); Crystal structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to opaque
Luster: Vitreous to waxy (when smoothed)

Identified July 12, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to opaque; Luster: Vitreous to waxy (when smoothed); Crystal structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Formation & geological history

Formed from silica-rich hydrothermal solutions or as a primary constituent in igneous and metamorphic rocks. This specific specimen has been smoothed and rounded by either river/ocean erosion or mechanical tumbling.

Uses & applications

Commonly used for landscaping, decorative garden stones, meditation stones, fish tanks, and as an abrasive in industrial sandblasting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky white quartz gets its appearance from tiny fluid inclusions of gas or liquid trapped during crystal growth.

Field identification & locations

Identify by its hardness (it can scratch glass and steel) and lack of cleavage. Often found in abundance on beaches, in riverbeds, or as decorative gravel in urban environments.