Freshwater Diatomite Deposits in the Western United …
Diatomite is produced from large open-pit mines. The commercial value and uses of diatomite depend on the purity and even the diatom species. In 2004, the United States accounted for approximate-ly 30% of world diatomite production. This included 620,000 tons of diatomite valued at $177 million mined in Califor-nia, Nevada, Oregon, and …