Diatoms are members of the kingdom Protista.
Diatoms are unicellular algae.
Their cell wall is made up of silica and thus they are indestructible.
Cell walls form two thin overlapping shells that fit together as in a soap box.
Accumulation of cell walls of diatoms over millions of years is called diatomaceous earth.
Diatomaceous soil is gritty in nature and is used in polishing, filtration of oils and syrups.
Final answer :-
Hence, this is the nature of cells in diatoms.
