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 loed in south central Oregon. The company's assets in Lake County, Oregon consist of the mine which contains the Tucker Hill ...

Apr 19, 2020 · 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 loed in south central Oregon.

Jun 03, 2020 · Kevin Winter. Perlite mining giant Imerys Performance Materials completed the purchase of Cornerstone Industrial Minerals Corp. on Wednesday, April 15, for an undisclosed sum. Cornerstone owns one mine in the Tucker Hill area of Lake County, along with a processing plant in Lakeview and one in Florida. In 2019 the company generated 12 million ...

Perlite Ore We specialize in Perlite processing. Mining, and... >> REQUEST MORE INFORMATION History Interest in the Tucker Hill area goes back to 1949 when a group of local... prospectors staked claims on outcropping perlite loed in the northwestern portion of the present property block. A bulk sample expansion test was favorable, and smallscale mining... was conducted until 1954.