mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Milky white to light tan; Luster: Vitreous to waxy; Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Milky white to light tan
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Milky white to light tan; Luster: Vitreous to waxy; Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.
Formation & geological history
Formed via hydrothermal activity or crystallization from cooling magma. This pebble has been weathered and rounded through transport in a riverbed or shoreline over thousands of years.
Uses & applications
Industrial use in glassmaking, abrasives, and electronics. Common in garden landscaping and lapidary tumbling for beginners.
Geological facts
Quartz is the most abundant and varied mineral on Earth's surface. Rounded 'river stones' like this are often found far from their original vein due to hydraulic transport.
Field identification & locations
Identify by its inability to be scratched by a steel knife and lack of cleavage. Found globally in almost all geological environments involving water erosion.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock