Mineral Resource of the Month: Perlite | EARTH Magazine
Imports of processed crude perlite to the United States in 2009 were at the lowest levels since 1997. Greece surpassed the United States in processed perlite production starting in 2003. Perlite is mined in about 35 countries; leading producing countries over the last decade were Armenia, China, Greece, Hungary, Japan, Turkey and the United States.