In the marine environment, diatoms are the primary producers.
As a result, they're also known as 'ocean pearls.' Because diatoms' walls are comprised of silica, they leave behind a lot of cell deposits in their environment.
Diatomaceous earth is the name for this type of deposit. Due to its granular character, diatomaceous earth is used for polishing and filtering oils and syrups.
Diatoms are photosynthesizing algae with a siliceous skeleton that can be found in practically any wet environment, including fresh and marine waterways, soils, and even the ocean.
They are either non-motile or have restricted mobility due to the release of mucilaginous material via a channel slit-like groove termed a raphe.