Pyrite is also known as “fool’s gold.” Pyrite’s name derives from the Greek word pyr, meaning “fire,” due to the sparks it emits when struck by iron. It is also called iron pyrite or simply pyrites. Pyrite is hard, brittle and often crystalline. Pyrite occurs in igneous rocks, and is found in hydrothermal veins associated with sphalerite, galena, quartz, copper sulphides and gold; the last two sometimes commercially extracted from pyrite-rich ores.
Deposits of pyrite can be found in The Czech Republic, Switzerland, Italy, Spain, United Kingdom, Peru, Bolivia, Mexico, Romania, and Sweden; in the United States in New York, Pennsylvania, Illinois and Colorado.