Common Igneous Rocks (Part 2)
Granite
Granite is a phaneritic, felsic igneous rock composed primarily of quartz and feldspar. Granite occurs in a variety of colors, but is usually white, light gray, or pink.
Granite (Photograph by Parvinder Sethi)
Gabbro
Gabbro is a phaneritic, mafic igneous rock composed primarily of calcium-rich feldspar, pyroxene, and olivine.
Gabbro (Photograph by Parvinder Sethi)