Mineral

Quartz pebble

Silicon dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: white to yellowish. Luster: vitreous to waxy. Crystal structure: hexagonal (though this piece is water-worn and lacks distinct crystal faces). Cleavage: none, conchoidal fracture. Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: white to yellowish
Luster: vitreous to waxy

Identified June 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed from the weathering and erosion of larger quartz-bearing rocks (like granite or sandstone). Transported and smoothed by water action in rivers, streams, or oceans.

Uses & applications

Common pebbles like this have little industrial or commercial use, though larger quantities can be used in landscaping or construction. Individual pieces have no significant jewelry value.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pebbles like this are incredibly common finds on beaches and in riverbeds.

Field identification & locations

Identified in the field by its hardness (will scratch glass), lack of cleavage, and waxy to vitreous luster. Commonly found in sedimentary deposits globally.