sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Tan to creamy white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- Tan to creamy white
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Tan to creamy white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed through the weathering and erosion of igneous or metamorphic rocks containing quartz. This specimen has been rounded and smoothed by water transport in a fluvial or beach environment.
Uses & applications
Commonly used in landscaping, road construction (aggregate), and occasionally for decorative stone collecting. Purer quartz is used in glass and electronics.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. These rounded pebbles are often found in 'river rock' mixes and can withstand millions of years of erosion.
Field identification & locations
Identified by its hardness (will scratch glass), lack of breakage lines (cleavage), and smooth, rounded water-worn texture. Found globally in riverbeds, glacial deposits, and beaches.
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Quartz pebble
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