mineral
Quartz pebble
Silicon dioxide (SiO2)
Hardness of 7 on the Mohs scale, white to clear color with brownish staining, vitreous luster, hexagonal crystal system when well-formed, no cleavage, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, white to clear color with brownish staining, vitreous luster, hexagonal crystal system when well-formed, no cleavage, specific gravity of 2.65
Formation & geological history
Formed through hydrothermal processes or crystallization in igneous, metamorphic, and sedimentary environments; weathered out of parent rock and rounded by water transport over long periods
Uses & applications
Used in glassmaking, electronics, abrasive materials, and as a decorative stone or tumbled specimen
Geological facts
Quartz is one of the most abundant and durable minerals in the Earth's continental crust, highly resistant to both chemical and mechanical weathering
Field identification & locations
Found worldwide in riverbeds, beaches, and soil; identified by its high hardness (scratches glass) and conchoidal fracture
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Schist
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Septarian Pebble
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