A coarse grained, felsic intrusive rock. The minerals which make up a granite are typically quartz, feldspars and micas. In the case of biotite muscovite granite, the constituent minerals are milky (white) quartz, plagioclase feldspar and biotite and muscovite mica crystals. The biotite appears as small black ‘flecks’ on the surface of the specimens. These particular samples come from Liskeard, Cornwall, UK. Specimens are supplied in a polythene bag in lots of 1 kg with a label.
