mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on the Mohs scale. Color: Typically white, clear, grey, or yellowish. Luster: Vitreous (glassy). Crystal Structure: Trigonal. Cleavage: None (exhibits conchoidal fracture). Specific Gravity: 2.65.
- Hardness
- 7 on the Mohs scale
- Color
- Typically white, clear, grey, or yellowish
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on the Mohs scale. Color: Typically white, clear, grey, or yellowish. Luster: Vitreous (glassy). Crystal Structure: Trigonal. Cleavage: None (exhibits conchoidal fracture). Specific Gravity: 2.65.
Formation & geological history
Formed through crystallization from magma or silica-rich solutions in hydrothermal veins, and subsequently weathered and transported by water into a rounded pebble.
Uses & applications
Used in decorative landscaping, glass manufacturing, abrasives, electronics, and lapidary work.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and is exceptionally resistant to weathering, which is why it often survives as a pebble long after other minerals have eroded away.
Field identification & locations
Can be identified by its high hardness (scratches glass) and conchoidal fracture. Found worldwide in riverbeds, beaches, and sedimentary deposits.
