igneous
Granite Pebble
Intrusive Igneous Rock
Hardness of 6 to 7 on the Mohs scale, multicolored (typically gray, white, pink, or speckled due to quartz, feldspar, and mica), dull to vitreous luster, phaneritic crystal structure with visible interlocking mineral grains, specific gravity around 2.65 to 2.75.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, multicolored (typically gray, white, pink, or speckled due to quartz, feldspar, and mica), dull to vitreous luster, phaneritic crystal structure with visible interlocking mineral grains, specific gravity around 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling and solidification of magma deep beneath the Earth's surface over millions of years, commonly dating from the Precambrian to Cenozoic eras.
Uses & applications
Used widely in construction, monument building, countertops, and landscaping; small pebbles are often used in decorative ground cover or naturally weathered along riverbeds.
Geological facts
Granite is the most common rock of the Earth's continental crust and is exceptionally durable against weathering compared to sedimentary rocks.
Field identification & locations
Easily identified in the field by its speckled appearance showing distinct mineral crystals like quartz and feldspar; commonly found in glacial till, riverbeds, and mountainous regions worldwide.
