mineral
Quartz pebble
Silicon dioxide (SiO2)
Hardness of 7 on the Mohs scale, transparent to translucent with a vitreous to greasy luster, conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, transparent to translucent with a vitreous to greasy luster, conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Formed via crystallization from silica-rich solutions or cooling magma, frequently smoothed by water transport in rivers or beaches over geological timescales.
Uses & applications
Commonly used in landscaping, road construction, glassmaking, electronics, and as decorative gravel or tumbled stones.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found universally in stream beds, beaches, and sedimentary deposits.
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Schist
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Septarian Pebble
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