sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale. Color is primarily white or translucent with dark mineral inclusions. Luster is vitreous to greasy. Crystal structure is trigonal (microcrystalline or macrocrystalline). Cleavage is none, fracture is conchoidal.
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Physical properties
Hardness of 7 on the Mohs scale. Color is primarily white or translucent with dark mineral inclusions. Luster is vitreous to greasy. Crystal structure is trigonal (microcrystalline or macrocrystalline). Cleavage is none, fracture is conchoidal.
Formation & geological history
Formed through the accumulation and prolonged water-action (weathering and erosion) of quartz-rich rocks in rivers, beaches, or stream beds over thousands to millions of years.
Uses & applications
Used in landscaping, decorative items, gravel, and lapidary work.
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
Found easily in stream beds, riverbanks, and beaches worldwide. Identified by its high hardness (scratches glass) and conchoidal fracture.
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