mineral

Quartz Pebble (with Iron Inclusions)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: Pale tan, cream, pinkish-orange with thin dark mineral fractures/veins. Luster: Vitreous to waxy (smooth, river-worn surface). Crystal Structure: Trigonal. Cleavage: None, exhibits conchoidal fracture.

Hardness: 7 on Mohs scale
Luster: Vitreous to waxy (smooth, river-worn surface)

Identified July 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed as quartz veining within host rocks that broke down and were transported by water over extended periods, rounding and smoothing the specimen through stream or beach erosion.

Uses & applications

Commonly collected as river pebbles, used in decorative landscaping, polished for rock tumbling, or used in aquariums.

Geological facts

Quartz is the second most abundant mineral in the Earth's continental crust. The reddish or brownish tint in such pebbles is often caused by micro-inclusions or staining from iron oxide.

Field identification & locations

Identified by its hardness (scratches glass readily), smooth river-worn texture, and semi-translucent quartz composition filled with dark fracturing lines. Found in riverbeds, gravel pits, and beaches worldwide.

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Arenite (SiO2 based)

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Septarian Pebble

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Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

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Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

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