mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, transparent to translucent white or yellowish color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, transparent to translucent white or yellowish color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through crystallization in igneous, metamorphic, and sedimentary environments. Quartz is exceptionally resistant to weathering, allowing pebbles to form over millions of years through water and wind erosion of larger rock formations.
Uses & applications
Used in electronics, manufacturing of glass, abrasives, gemstones, and ornamental objects.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust. Its piezoelectric properties make it essential for timing devices in watches and electronics.
Field identification & locations
Found worldwide in riverbeds, beaches, and glacial deposits. Easily identified by its high hardness (scratches glass) and conchoidal fracture.
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Septarian Pebble
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Schist
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Metamorphic
Potassium Feldspar (Orthoclase)
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