mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Milky white to tan/yellow; Luster: Vitreous to waxy (when river-worn); Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture.
- Hardness
- 7 on Mohs scale
- Color
- Milky white to tan/yellow
- Luster
- Vitreous to waxy (when river-worn)
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Physical properties
Hardness: 7 on Mohs scale; Color: Milky white to tan/yellow; Luster: Vitreous to waxy (when river-worn); Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed through hydrothermal processes or within igneous rocks like granite. This specific specimen is a water-worn river pebble, shaped by erosion over thousands of years.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), abrasives, and as decorative gravel or pocket stones.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. These smooth shapes are created by the constant tumbling action in rivers or ocean surf.
Field identification & locations
Identify by its ability to scratch glass and lack of cleavage. Commonly found in riverbeds, beaches, and glacial deposits worldwide.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous