sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: White to off-white; Luster: Vitreous to dull; Crystal structure: Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- White to off-white
- Luster
- Vitreous to dull
Identified More sedimentary →
Explore Quartz Pebble 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 to off-white; Luster: Vitreous to dull; Crystal structure: Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed from the weathering and erosion of quartz-bearing rocks (like granite or pegmatite) followed by water transport and rounding in streams, rivers, or beaches. Geological age varies widely from Precambrian to Recent.
Uses & applications
Used in landscaping, decorative gravel, aquarium substrates, and as aggregate in construction materials.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust. Its high hardness and resistance to chemical weathering allow it to survive long transport distances, often outlasting almost all other minerals in sedimentary systems.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and resistance to acid. Commonly found in riverbeds, beaches, and conglomeratic sedimentary rock formations 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
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary