mineral

Tumbled quartz-rich pebble

Quartz (SiO₂), possibly chalcedony or quartzite

AI-generated identification · may be incorrect

Smooth, rounded, pale gray-beige specimen with a waxy to dull luster and translucent edges; quartz hardness is 7 Mohs, with no visible cleavage and conchoidal fracture. The image is insufficient to determine crystal structure or specific gravity confidently.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Likely naturally rounded river gravel or a mechanically tumbled specimen derived from quartz vein material, quartzite, or chalcedony. Quartz commonly formed in silica-rich igneous, metamorphic, and hydrothermal environments over a wide range of geological ages.

Uses & applications

Used as a decorative stone, lapidary material, aggregate, and industrial silica source; attractive varieties may be used in jewelry. This small common pebble has minimal commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically resistant, allowing it to survive weathering and become concentrated in gravels and beaches.

Field identification & locations

Common worldwide, especially in riverbeds, beaches, quartz veins, and quartzite terrains. A glass-scratch test, lack of cleavage, and hardness near 7 help distinguish it from calcite or soft decorative stone.