diatomaceous earth

diatomaceous of

Wenatchee — Thumbnail History (historylink.org) The name Wenatchee applies to a river and its valley, a tribe (Wenatchi), and a town. The county seat of Chelan County, Wenatchee is a thriving and growing town at the confluence of the Wenatchee and Columbia rivers and the center of the nation’s major apple-producing area…

Rockhounding Washington Green Opal From a Diatomaceous Earth Mine (YouTube) This location is a fun little stop off I-90 north of Vantage, WA. This is an active mining operation so going during business hours may be an issue so it’s best to stick to the weekends, and after 5pm.

Diatomaceous earth (Wikipedia) Diatomaceous earth (/ˌdaɪ.ətəˈmeɪʃəs/ DY-ə-tə-MAY-shəs), also known as diatomite (/daɪˈætəmaɪt/ dy-AT-ə-myte), celite, or kieselguhr, is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a particle size ranging from more than 3 mm to less than 1 μm, but typically 10 to 200 μm. Depending on the granularity, this powder can have an abrasive feel, similar to pumice powder, and has a low density as a result of its high porosity. The typical chemical composition of oven-dried diatomaceous earth is 80–90% silica, with 2–4% alumina (attributed mostly to clay minerals), and 0.5–2% iron oxide.