igneous
Granite Pebble
Granite
AI-generated identification · may be incorrectHardness 6-7, gray speckled color, dull luster (due to weathering), crystalline structure, varied cleavage depending on constituent minerals, specific gravity 2.65-2.75
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Physical properties
Hardness 6-7, gray speckled color, dull luster (due to weathering), crystalline structure, varied cleavage depending on constituent minerals, specific gravity 2.65-2.75
Formation & geological history
Formed from slow cooling of magma deep underground, subsequently weathered and smoothed by water transport in a river or beach environment.
Uses & applications
Commonly used in construction, landscaping, and sometimes collected for aesthetic or tumbling purposes.
Geological facts
Granite is one of the most common rocks on the continental crust. Pebbles like this have been rounded over time by natural water action.
Field identification & locations
Identified by its speckled appearance of quartz, feldspar, and mica. Commonly found in riverbeds, beaches, and glacial deposits.
