igneous
Weathered granite fragment
Granite, a coarse-grained plutonic rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectThe specimen appears mottled tan, gray, and brown with a granular, weathered surface. Granite typically has Mohs hardness 6–7, a crystalline texture, and no prominent cleavage; exact properties cannot be confirmed from the image.
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Physical properties
The specimen appears mottled tan, gray, and brown with a granular, weathered surface. Granite typically has Mohs hardness 6–7, a crystalline texture, and no prominent cleavage; exact properties cannot be confirmed from the image.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing visible crystals to grow. Its age and geological source cannot be determined from this fragment alone.
Uses & applications
Granite is widely used as building and paving stone, countertops, monuments, and aggregate; this small fragment is mainly suitable for collecting.
Geological facts
Granite’s visible grains are interlocking crystals, commonly quartz and feldspar, with darker minerals such as biotite or hornblende.
Field identification & locations
Look for interlocking grains and a mix of light and dark minerals; a glassy or uniformly fine-grained texture would suggest another rock. Granite occurs worldwide in continental crust, but the fragment’s locality is unknown.
