kieselgurs[Français]

nom
1 : a light soil consisting of siliceous diatom remains and often used as a filtering material
2 : a light soil consisting of siliceous diatom remains and often used as a filtering material
3 : a light soil consisting of siliceous diatom remains and often used as a filtering material
4 : a light soil consisting of siliceous diatom remains and often used as a filtering material