mineral

Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: off-white to beige with yellowish staining in crevices; Luster: waxy to dull (tumbled by water); Crystal structure: Trigonal/Hexagonal; Cleavage: none (conchoidal fracture); Specific gravity: ~2.65.

Hardness: 7 on Mohs scale
Color: off-white to beige with yellowish staining in crevices
Luster: waxy to dull (tumbled by water)

Identified July 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed in hydrothermal veins or igneous intrusions, then eroded, transported, and water-worn in stream beds, rivers, or beach environments.

Uses & applications

Commonly used in landscaping, gravel aggregates, decorative rock arrangements, or as tumbling rough for hobbyists.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust. Rounded quartzite and quartz pebbles often contain microcrystalline cavities or small vugs.

Field identification & locations

Can be identified by its hardness (scratches glass readily), rounded water-worn smooth surface, lack of cleavage, and light tan to white color. Extremely common along riverbeds and beaches worldwide.