igneous
Granite or Pegmatite with Quartz and Feldspar
Granitoid
Hardness 6-7, mixed colors (white, pink, gray, black), phaneritic texture, visible crystals of quartz, feldspar, and possibly biotite or hornblende.
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Physical properties
Hardness 6-7, mixed colors (white, pink, gray, black), phaneritic texture, visible crystals of quartz, feldspar, and possibly biotite or hornblende.
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface.
Uses & applications
Used in construction, dimension stone, countertops, paving, and monuments.
Geological facts
Granite makes up a significant portion of the Earth's continental crust.
Field identification & locations
Identify by its coarse-grained texture and typical mineral assemblage. Commonly found in continental crustal shields and mountain ranges.
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