sedimentary
Common Brown Pebble
Weathered Rock Fragment
Hardness varies based on composition (typically 6-7 on Mohs scale for quartz-rich pebbles), brown color, dull luster, amorphous or cryptocrystalline structure, no distinct cleavage.
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Physical properties
Hardness varies based on composition (typically 6-7 on Mohs scale for quartz-rich pebbles), brown color, dull luster, amorphous or cryptocrystalline structure, no distinct cleavage.
Formation & geological history
Formed through the mechanical weathering, erosion, and transport of parent rocks, eventually rounding into a pebble shape by water action in rivers or beaches.
Uses & applications
Used in landscaping, decorative gravel, and general construction aggregates.
Geological facts
Pebbles are classified by their grain size in the Wentworth scale, ranging from 4 to 64 millimeters in diameter.
Field identification & locations
Found abundantly in riverbeds, stream banks, and beaches worldwide. Identify by its rounded shape and weathered surface.
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