igneous
Granite gravel
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectTypically Mohs 6–7; mottled gray, pink, or white with a granular texture and vitreous quartz grains. The image is partly obscured by a metal grate, so mineral details are indistinct.
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Physical properties
Typically Mohs 6–7; mottled gray, pink, or white with a granular texture and vitreous quartz grains. The image is partly obscured by a metal grate, so mineral details are indistinct.
Formation & geological history
Forms when silica-rich magma cools slowly underground, allowing visible crystals to grow; granite occurs in ancient continental crust and ranges widely in age.
Uses & applications
Commonly used as crushed aggregate, road base, landscaping stone, and building material; decorative pieces may also be polished.
Geological facts
Granite’s durability comes largely from interlocking quartz and feldspar crystals; its exact appearance varies with mineral proportions.
Field identification & locations
The visible pieces look like irregular, mottled coarse rock, consistent with granite, though the grate prevents confident identification. Granite is widespread worldwide, especially in continental mountain belts and exposed batholiths.
