MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY
Granite sample, close-up. Granite is an intrusive igneous rock consisting of the minerals quartz, feldspar and mica. This clear granite consists of the black mica biotite, a large proportion of quartz and only a little grey feldspar. The red colour is from plagioclase feldspar crystals. This sample is from the Rock of Ages Quarry, Barre, Vermont, USA, the world's largest granite quarry.
Model release not required. Property release not required.