Perlite Institute Inc.
An International trade association which establishes product standards and specifications, and encourages the development of new product uses through research.
http://www.perlite.org

Role of Perlite in Hydroponic Culture
An article on the Role of Perlite in Hydroponic Culture by David Hall.
http://www.schundler.com/hydroculture.htm

Perlite
Pictures, links, and a brief description of the properties and applications of this siliceous rock.
http://www.perlite.net/

Noble International SA
noble international est spécialisée dans les microsphères de noblite et perlite : charge allégeante, inerte, inorganique, non toxique, rhyolite...
http://www.nobleinternational.com/default.html

LAF Group
Provides mineral based fire protection systems using vermiculite, perlite, and their derivatives. Also has contracting division. Located in Greenacre, NSW, Australia.
http://www.lafgroup.com

Pumex
Distribute pumice, calcium carbonate, talc, perlite, glass beads anmd a range of other materials, Used as fillers for plastic polymers.
http://www.pumex.co.uk/

Midland Cryogenics Ltd
Specialists in Cryogenic Services - Pipe Freezing, Shrink Fitting, Nitrogen Supplies
http://www.midlandcryogenics.com