Cymrite was discovered in Wales but is found in other areas throughout the United States, Africa, Greece and other parts of Europe. It occurs in generally high temperature-pressure areas such as the hydrothermal manganese silicate ore that makes up the Benalt Mine in Wales and in manganese rock that has undergone high-pressure metamorphism found in Greece.6 It is important to geologists because of its limited occurrence, when cymrite is present on a rock it indicates that the rock, at some point, must have experienced high pressure and temperature.
Mindat.org. Accessed September 27, 2010 http://www.mindat.org/min-1205.html ↩
Webmineral data Accessed September 5, 2010 http://www.webmineral.com/data/Cymrite.shtml ↩
[O'Donoghue,M. (1976) The Encyclopedia of Minerals and Gemstones. Orbis Publishing, London]. ↩
Handbook of Mineralogy. Accessed October 15, 2010. http://rruff.geo.arizona.edu/doclib/hom/cymrite.pdf ↩