mineral
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Creamy white to translucent; Luster: Vitreous to waxy; Texture: Rounded/Granular; Cleavage: None (conchoidal fracture).
- Hardness
- 7 on Mohs scale
- Color
- Creamy white to translucent
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Creamy white to translucent; Luster: Vitreous to waxy; Texture: Rounded/Granular; Cleavage: None (conchoidal fracture).
Formation & geological history
Forms in igneous, metamorphic, and sedimentary environments. This specific specimen is a water-worn or weathered pebble likely eroded from a quartz vein and transported by water.
Uses & applications
Used in construction aggregate, glass manufacturing, electronics, and as a common decorative landscape stone.
Geological facts
Quartz is the most abundant mineral in Earth's continental crust. It is chemically stable and durable, which is why it often remains as pebbles after other minerals have weathered away.
Field identification & locations
Identify by its ability to scratch glass and lack of reaction to acid. It is found globally in riverbeds, beaches, and soil.
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Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
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metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
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Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous