sedimentary
Quartz Pebble (with Hematite/Feldspar Inclusions)
Silicon Dioxide (SiO2)
Hardness around 7 on Mohs scale; white to off-white body with reddish-pink mottling; vitreous to dull sub-vitreous luster; smooth, water-worn beach/river pebble texture; lack of cleavage.
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Physical properties
Hardness around 7 on Mohs scale; white to off-white body with reddish-pink mottling; vitreous to dull sub-vitreous luster; smooth, water-worn beach/river pebble texture; lack of cleavage.
Formation & geological history
Formed as quartz vein material that weathered out of parent rock and was smoothed and rounded over time through mechanical erosion in a stream, river, or coastal environment.
Uses & applications
Commonly collected as beach pebbles, used in decorative landscaping, aquariums, gravel, and aggregate in construction.
Geological facts
Water-rounded quartz pebbles are among the most resistant rocks to chemical and physical weathering, surviving long transport distances in rivers and oceans.
Field identification & locations
Can be identified by its hardness (scratches glass), smooth rounded shape from erosion, and classic milky-white quartz appearance with reddish iron oxide (hematite) staining. Commonly found on beaches, riverbeds, and gravel beds worldwide.
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