igneous
Granite or granitic rock
Coarse crystalline felsic intrusive rock, chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectGray, granular texture with visible interlocking crystals and dull to vitreous luster; typical Mohs hardness is 6–7. Cleavage occurs within feldspar and mica, but the rock itself has no regular cleavage; density is about 2.6–2.7 g/cm³.
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Physical properties
Gray, granular texture with visible interlocking crystals and dull to vitreous luster; typical Mohs hardness is 6–7. Cleavage occurs within feldspar and mica, but the rock itself has no regular cleavage; density is about 2.6–2.7 g/cm³.
Formation & geological history
Formed when silica-rich magma slowly cooled underground, allowing large crystals to grow; specimens may range from Precambrian to younger Mesozoic or Cenozoic intrusions.
Uses & applications
Widely used as building stone, countertops, monuments, aggregate, and landscaping material; attractive polished varieties have modest decorative value.
Geological facts
The image is somewhat low-resolution, so exact identification is uncertain; it could also be a closely related granodiorite or weathered gneiss.
Field identification & locations
Look for interlocking white or pink feldspar, translucent gray quartz, and black mica, with no layering or vesicles. Common worldwide, especially in continental shields and mountain batholiths.
