sedimentary
Beach Pebble (Quartz / Quartzite)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale. Color: White, cream, tan, grey, yellow. Luster: Dull to vitreous. Structure: Microcrystalline or granular. Cleavage: None (conchoidal fracture).
- Hardness
- 7 on Mohs scale
- Color
- White, cream, tan, grey, yellow
- Luster
- Dull to vitreous
Identified More sedimentary →
Explore Beach Pebble (Quartz / Quartzite) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on Mohs scale. Color: White, cream, tan, grey, yellow. Luster: Dull to vitreous. Structure: Microcrystalline or granular. Cleavage: None (conchoidal fracture).
Formation & geological history
Formed through the erosion, mechanical weathering, and long-term water-abrasion of quartz-rich igneous, metamorphic, or sedimentary rocks along coastal shorelines and rivers.
Uses & applications
Used in landscaping, aquarium decor, construction aggregate, decorative stone paths, and beachcombing collections.
Geological facts
Beach pebbles undergo millions of smooth-tumble cycles from ocean wave action, naturally rounding their edges over long periods of geological time.
Field identification & locations
Identify by rounded, water-worn smooth surfaces and high hardness (scratches glass). Very common along sea beaches, lake shores, and riverbeds worldwide.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary