Cornerstone industrial minerals Corporation ...
is a privately held industrial minerals company engaged in the mining, processing, and marketing of perlite. The primary asset of the company is the Tucker Hill operation located in south central Oregon.
The company's assets in Lake County, Oregon consist of the mine which contains the Tucker Hill perlite deposit, the processing facility in Lakeview, and the trans-loading terminal near Klamath Falls.
What is perlite used for? -
More Information On PErlite:
These fact sheets and more information on Perlite can be found at Perlite Institute.