sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, white to gray color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on Mohs scale, white to gray color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage.
Formation & geological history
Formed through intense weathering and aqueous transport of primary igneous or metamorphic quartz veins, rounding over millions of years in river or beach environments.
Uses & applications
Used in landscaping, decorative gravel, abrasive manufacture, and occasionally tumbled for jewelry or lapidary crafts.
Geological facts
Quartz is one of the most abundant and stable minerals on Earth's surface, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Easily identified in the field by its high hardness (scratches glass) and lack of reaction to acid; found worldwide in riverbeds, beaches, and glacial tills.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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