Diatomite is a kind of natural and soft siliceous sedimentary rock, which is easy to break into fine white to gray white powder. It is deposited from the cell wall of diatom; Light yellow or light gray, soft and light texture, can be easily ground into powder; Low density, porous, rough and highly absorbent. The typical chemical composition of oven dried diatomite is 80 ~ 90% silica, 2 ~ 4% alumina (mostly clay minerals) and 0.5 ~ 2% iron oxide.

Diatomite is composed of fossil remains of diatom, a hard shell protist (golden algae). It is used as a filter aid, including mild abrasives in metal polishing agents and toothpaste products, mechanical pesticides, liquid absorbers, paint matting agents, reinforcing fillers in plastics and rubber, anti adhesion agents in plastic films, porous carriers of chemical catalysts, cat dung, activators in coagulation research, stable components of explosives Thermal insulation materials and soil for potted plants and trees such as bonsai.