ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Granite. Polarised light micrograph of a sample of granite in thin section. Granite is an igneous intrusive rock, usually found in large plutons or batholyths. Its chemistry is felsic; it consists of quartz, potassic feldspar, plagioclase and biotite mica. The colour may be white, grey or pink. Its structure is massive, with medium or fine grain. Large crystal inclusions (xenoliths) of mafic minerals may also be seen. The main use of granite is as a building material. Magnification x9 at 6x7cm size. Magnification: x16 at 5x4 inch size.
Model release not required. Property release not required.