igneous
Granite pebble
Granite, a coarse-grained felsic intrusive igneous rock
AI-generated identification · may be incorrectLight-colored, speckled rock with visible quartz, feldspar, and dark mica or amphibole; typically Mohs 6–7, vitreous quartz and feldspar luster, interlocking crystals, and no prominent cleavage at rock scale. The rounded shape indicates water or abrasion weathering.
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Physical properties
Light-colored, speckled rock with visible quartz, feldspar, and dark mica or amphibole; typically Mohs 6–7, vitreous quartz and feldspar luster, interlocking crystals, and no prominent cleavage at rock scale. The rounded shape indicates water or abrasion weathering.
Formation & geological history
Magma cooled slowly underground, allowing coarse crystals to form; its age cannot be determined from the image and may range from hundreds of millions to billions of years.
Uses & applications
Granite is widely used for building stone, paving, countertops, and monuments; this small pebble is mainly suitable for collecting or landscaping.
Geological facts
Granite’s pale minerals are commonly quartz and feldspar, while its dark flecks are often biotite or hornblende.
Field identification & locations
Recognize it by its hard, speckled, interlocking crystals and lack of layering; granite occurs widely in continental crust and as rounded stream or beach pebbles. The specimen’s exact source cannot be established visually.
