mineral

Quartz Pebble (Tumbled / Beach Pebble)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: Milky white to pale pinkish-orange with iron staining. Luster: Vitreous to waxy. Crystal structure: Trigonal/Hexagonal. Specific gravity: 2.65. Cleavage: None (conchoidal fracture).

Hardness: 7 on Mohs scale
Color: Milky white to pale pinkish-orange with iron staining
Luster: Vitreous to waxy

Identified July 26, 2026More mineral →

Explore Quartz Pebble (Tumbled / Beach Pebble) in the encyclopedia →

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Physical properties

Formation & geological history

Formed in hydrothermal veins, pegmatites, and metamorphic environments. This specific specimen has been naturally or mechanically tumbled and smoothed, likely in a river, ocean beach, or rock tumbler.

Uses & applications

Commonly collected as pocket stones, decorative gravel, landscaping, tumbled gemstone collections, and used for craft projects.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust. Pure quartz is transparent and colorless, but impurities like iron oxides give stones warm yellow, orange, or reddish hues.

Field identification & locations

Identified by its Mohs hardness of 7 (can scratch glass and steel easily), waxy to vitreous sheen, and lack of distinct cleavage. Commonly found along shorelines, gravel bars, and riverbeds globally.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Limonite / Goethite (Iron Ore Mineral nodule)

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Schist

Metamorphic

Septarian Pebble

Septarian nodule / Concretion

sedimentary

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

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Sandstone with Mineral Veining or Crust

Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)

sedimentary