Composition: An igneous rock, formed beneath the surface of the earth, composed chiefly of feldspar and quartz. Small amounts of mica and hornblende may be present.
Nomenclature: Named after the Latin word "granum" which means "grain" because of its grainy texture.
Industrial Uses: Building stone, ornamental stone.
Additional Notes: One of the most durable and weather-resistant rocks. Frequently chosen for monuments because of its durability.
Burkina Faso : Scott 905 : 50 CFA francs : 4 Feb 1991
Finland : Scott 732 : 1.30 markka : 8 Feb 1986
Finland : Scott 733 : 1.60 markka : 8 Feb 1986