mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: Milk white/Opaque; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: Milk white/Opaque
Luster: Vitreous to waxy

Identified May 26, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Milk white/Opaque; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed from molten magma or geothermal hydrothermal veins. This specific specimen has been chemically or mechanically smoothed by water or beach action, likely from the Holocene epoch.

Uses & applications

Commonly used as decorative landscaping stones, aquarium gravel, or tumble-polished for hobbyist collections and jewelry.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust. Milkiness in white quartz is often caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.

Field identification & locations

Identify by its hardness (it will easily scratch glass) and lack of cleavage. Found globally in riverbeds, beaches, and mountain trails. Collectors should look for smoothness and translucency.