sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, off-white to beige in color, dull to sub-vitreous luster, microcrystalline/amorphous weathered surface, no cleavage, high resistance to chemical weathering.
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Physical properties
Hardness of 7 on the Mohs scale, off-white to beige in color, dull to sub-vitreous luster, microcrystalline/amorphous weathered surface, no cleavage, high resistance to chemical weathering.
Formation & geological history
Formed through the erosion, rounding, and transport of quartz-bearing rocks in stream beds, rivers, or beach environments.
Uses & applications
Commonly used as aggregate in construction, landscaping gravel, or for basic tumbling and lapidary practice.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust. Rounded quartz pebbles can travel thousands of miles along river systems over millions of years.
Field identification & locations
Can be identified in the field by its hardness (scratches glass and steel), pale color, and smooth, water-worn edges. Commonly found in riverbeds, glacial deposits, and beaches worldwide.
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