mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale. Color: Varies widely, often clear, white, grayish, or yellowish. Luster: Vitreous (glassy). Crystal structure: Trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Varies widely, often clear, white, grayish, or yellowish
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale. Color: Varies widely, often clear, white, grayish, or yellowish. Luster: Vitreous (glassy). Crystal structure: Trigonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.
Formation & geological history
Formed through the crystallization of silica-rich solutions or cooling magmas, often weathered from igneous or metamorphic rocks and transported by water into rounded pebbles.
Uses & applications
Used in glassmaking, electronics, abrasives, gemstones, and decorative landscaping.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electric charge under mechanical stress.
Field identification & locations
Easily identified by its high hardness (scratches glass) and conchoidal fracture. Found worldwide in riverbeds, beaches, and various rock formations.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
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
Septarian Pebble
Septarian nodule / Concretion
sedimentary