What is vermiculite?
Vermiculite is a naturally occurring mineral (minerals are the “building blocks” of rocks) composed of shiny flakes that resemble mica.
Historically, much of the world's supply of vermiculite came from a mine near Libby, Montana.
The Libby mine also had a natural deposit of asbestos, and the vermiculite from Libby contains asbestos.
Courtesy of The ATSDR
Vermiculite asbestos often shows up as shiny flakes. Learn more.