mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, white or translucent color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, white or translucent color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity around 2.65.
Formation & geological history
Formed through crystallization in igneous, metamorphic, and sedimentary environments. Quartz is exceptionally resistant to weathering and erosion, allowing it to persist as rounded pebbles in rivers and beaches over millions of years.
Uses & applications
Used in glassmaking, abrasives, electronic components, and as aggregate in construction.
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 electrical charge under mechanical stress.
Field identification & locations
Easily identified by its hardness (scratches glass) and conchoidal fracture. Commonly found in riverbeds, beaches, and glacial outwashes worldwide.
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