sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Tan, beige, off-white with earthy tones; Luster: Vitreous to dull/waxy; Structure: Trigonal/Hexagonal quartz aggregate; Cleavage: None

Hardness: 7 on Mohs scale
Color: Tan, beige, off-white with earthy tones
Luster: Vitreous to dull/waxy

Identified July 22, 2026More sedimentary →

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Physical properties

Hardness: 7 on Mohs scale; Color: Tan, beige, off-white with earthy tones; Luster: Vitreous to dull/waxy; Structure: Trigonal/Hexagonal quartz aggregate; Cleavage: None

Formation & geological history

Formed via water erosion and stream/river weathering, rounding off angular quartz fragments over extended geological periods.

Uses & applications

Commonly used in decorative landscaping, construction aggregate, gravel, and as minor decorative polished stones.

Geological facts

Quartz pebbles are among the most resistant geological materials to physical and chemical weathering, allowing them to survive long transportation in rivers and streams.

Field identification & locations

Identified by its hardness (scratches glass) and smooth, water-worn shape. Commonly found in stream beds, riverbanks, glacial deposits, and beaches globally.