Cornerstone industrial minerals...
Is a industrial minerals company. They specialize in mining and processing perlite. A form of obsidian characterized by spherulites formed by cracking of the volcanic glass during cooling, used as insulation or in plant growth media.
What is perlite used for? -
- INDUSTRIAL APPLICATIONS
More Information On PErlite:
These fact sheets and more information on Perlite can be found at Perlite Institute.