mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 on the Mohs scale. Color: Typically white, milky, clear, or yellowish due to iron staining. Luster: Vitreous to greasy. Crystal Structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific Gravity: 2.65.
- Hardness
- 7 on the Mohs scale
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on the Mohs scale. Color: Typically white, milky, clear, or yellowish due to iron staining. Luster: Vitreous to greasy. Crystal Structure: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific Gravity: 2.65.
Formation & geological history
Formed through crystallization from silica-rich solutions or magmas, and commonly rounded by water transport in rivers, streams, or beaches over thousands to millions of years.
Uses & applications
Used in landscaping, decorative gravel, abrasive manufacture, glassmaking, and silica production.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Found worldwide in stream beds, beaches, and sedimentary deposits. Easily identified by its high hardness (scratches glass) and conchoidal fracture.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
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Limonite / Goethite (Iron Ore Mineral nodule)
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Septarian Pebble
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Schist
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Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral