sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically brown, tan, or clear in weathered river pebbles, vitreous to dull luster depending on wear, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically brown, tan, or clear in weathered river pebbles, vitreous to dull luster depending on wear, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed through the weathering and erosion of parent igneous or metamorphic rocks, followed by prolonged transport and rounding in fluvial or marine environments.
Uses & applications
Used in landscaping, decorative gravel, aggregate in construction, and general lapidary work.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth, highly resistant to both chemical and mechanical weathering, which allows small pebbles to survive millions of years of transport.
Field identification & locations
Found worldwide in riverbeds, beaches, and ancient sedimentary conglomerates. Easily identified by its high hardness (scratches glass) and lack of cleavage.
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Silicon dioxide (SiO2)
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