igneous
Weathered granite
Granite, a quartz–feldspar plutonic rock
AI-generated identification · may be incorrectPale gray to cream, coarse and granular with a dull weathered surface; typically quartz, potassium feldspar, plagioclase, and minor mica. Hardness is about 6–7 Mohs; individual grains have varied crystal structures and cleavage.
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Physical properties
Pale gray to cream, coarse and granular with a dull weathered surface; typically quartz, potassium feldspar, plagioclase, and minor mica. Hardness is about 6–7 Mohs; individual grains have varied crystal structures and cleavage.
Formation & geological history
Granite crystallizes slowly from silica-rich magma deep in the crust, commonly during continental mountain-building. The specimen’s age and precise origin cannot be determined from the image.
Uses & applications
Granite is widely used as dimension stone, paving, building cladding, countertops, and crushed aggregate; attractive pieces may be collected.
Geological facts
Its interlocking crystals reflect slow underground cooling, while surface weathering can make feldspar-rich granite rough and crumbly.
Field identification & locations
Look for interlocking pale feldspar and glassy quartz grains, often with dark mica; common in continental mountain belts worldwide. The image shows a strongly weathered surface, so fresh grains would aid identification.
