Rock Topics

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
Granite (Photograph by Parvinder Sethi)

Gabbro

Gabbro is a phaneritic, mafic igneous rock composed primarily of calcium-rich feldspar, pyroxene, and olivine.

Gabbro
Gabbro (Photograph by Parvinder Sethi)