![Diatomaceous earth](/sites/default/files/styles/scale_up_and_crop_4_3/public/2023-09/nov_diatomaceous_earth-_r1.jpg?itok=Pixko_IW)
Diatomaceous earth
Nov., 2018
Diatomaceous earth–is a naturally occurring, soft, siliceous sedimentary rock that consists of fossilized remains of diatoms. Diatomaceous earth is a thermal insulator and primarily composed of silica and is sometimes used as a refractory packing material in the glass industry. This is an unused sample that was analyzed to compare physical and compositional properties to a stone analysis.