igneous
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectPale pink, white, and gray grains with a speckled appearance; typically Mohs 6–7, glassy quartz luster, and interlocking crystals without cleavage as a whole. The small specimen appears weathered, so exact identification is uncertain from the image alone.
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Physical properties
Pale pink, white, and gray grains with a speckled appearance; typically Mohs 6–7, glassy quartz luster, and interlocking crystals without cleavage as a whole. The small specimen appears weathered, so exact identification is uncertain from the image alone.
Formation & geological history
Forms when silica-rich magma cools slowly underground, allowing visible crystals to grow; granite bodies occur across many geological ages, from Archean to recent periods.
Uses & applications
Used for building stone, countertops, monuments, aggregate, and decorative specimens; this small rough piece is mainly suitable for collecting.
Geological facts
Granite commonly contains pink or white feldspar, translucent quartz, and dark mica or amphibole, making its coarse, multicolored texture distinctive.
Field identification & locations
Look for interlocking light-colored crystals with scattered dark grains; common in continental crust and exposed in mountain ranges worldwide. A hand lens can help distinguish quartz and feldspar.
