sedimentary
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, milky white to translucent color, vitreous luster, hexagonal crystal system when formed, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, milky white to translucent color, vitreous luster, hexagonal crystal system when formed, conchoidal fracture with no true cleavage.
Formation & geological history
Formed via the weathering and erosion of parent igneous or metamorphic rocks, followed by prolonged water transport and rounding in riverbeds or marine environments.
Uses & applications
Used in landscaping, decorative gravel, aggregate for construction, and as a raw material for glassmaking and silicon production.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and physical weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of effervescence with acid, and smooth, water-worn shape; found worldwide in streams and beaches.
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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