A prismatic mineral of various colours that occurs in igneous and metamorphic rocks.
Some tourmaline is used as gemstones.
Black tourmaline crystals occur in a pinkish granite pegmatite rich in K-feldspar. Hills underlain by white gypsum. Gypsum from the Flat Bay deposit in western Newfoundland is used in the manufacturing of gyproc wallboard and cement in Corner Brook and is also exported to the United States. An occurrence of gold in quartz. This is a common association for gold, however, visible gold is rare and most gold is detected by chemical analyses.