mineral

Tumbled quartz-rich pebble (likely milky quartz or quartzite)

Quartz, SiO₂; possibly quartzite, a metamorphic quartz aggregate

AI-generated identification · may be incorrect

Cream to pale yellow, rounded and weathered, with a vitreous-to-waxy luster and visible granular texture. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65.

Identified September 13, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as resistant quartz or quartzite in an older igneous, metamorphic, or sedimentary source, then rounded by stream or beach transport. Its precise geological age and source cannot be determined from the photograph.

Uses & applications

Common quartz pebbles are used as landscaping and aggregate material; attractive polished pieces are sold as inexpensive lapidary specimens or décor.

Geological facts

The yellow coloration may come from iron-oxide staining or weathering rather than a distinct quartz variety.

Field identification & locations

Identify it by its hardness, lack of cleavage, glassy fracture, and inability to scratch it with a steel nail; quartz should scratch ordinary glass. Common worldwide, especially in stream gravels, beaches, and glacial deposits.