sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, translucent white to yellowish color, vitreous luster, conchoidal fracture, and no cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, translucent white to yellowish color, vitreous luster, conchoidal fracture, and no cleavage.
Formation & geological history
Formed through intense weathering and aqueous transport of primary igneous or metamorphic rocks, rounding over millions of years in high-energy environments like rivers or beaches.
Uses & applications
Used in landscaping, decorative gravel, abrasive manufacture, and as tumbling rough for lapidary work.
Geological facts
Quartz is one of the most abundant and chemically resistant minerals on Earth's continental crust. Its high durability allows it to survive multiple cycles of erosion and deposition.
Field identification & locations
Easily identified by its resistance to scratching by steel and conchoidal fracture. Found universally in riverbeds, glacial tills, and marine coastal environments.
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Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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