sedimentary
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and lack of cleavage. Color varies from clear to white, yellow, or brown due to iron impurities.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and lack of cleavage. Color varies from clear to white, yellow, or brown due to iron impurities.
Formation & geological history
Formed through the accumulation and weathering of primary quartz from igneous or metamorphic rocks, subsequently rounded by water transport in stream or marine environments.
Uses & applications
Used in landscaping, concrete aggregate, glass manufacturing, and abrasive applications.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust. Its high resistance to chemical weathering allows it to survive multiple cycles of erosion and deposition.
Field identification & locations
Easily identified in the field by its high hardness (scratches glass), lack of cleavage, and resistance to acid. Commonly found in riverbeds, beaches, and conglomeratic sedimentary rocks.
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