A naturally occurring mineral, diatomite—also known as diatomaceous earth or kieselguhr —is a lightweight, highly absorbent sedimentary rock. Derived from the fossilized skeletons of microscopic algae (diatoms), rich in silicon dioxide, it comes in the form of a harmless, odorless white powder. Its microscopic pores give it exceptional adsorption and filtration capacity, making it useful for diatomite bath mats , diatomaceous earth filters, cat litter, and even as a natural insecticide.
Natural origin of diatomite
Diatomite originates from the sedimentation and accumulation of single-celled algae in freshwater and oceans. After their death, their siliceous valves (true siliceous skeletons ) are deposited as sediments which, over time, form siliceous rocks. Dried, sometimes calcined (technical grade) or left in its "food grade" state, the material is reduced to particles a few microns in size, ideal for high filtration quality and remarkable absorption of liquids and impurities.
Composition and structure
Composed primarily of silicon dioxide ( SiO2 ), diatomite also contains trace elements and traces of sodium, magnesium, phosphate, and carbonates. Its porous structure (a network of pores, membranes, and valves ) acts as an efficient filtering substrate: the particles retain debris, impurities, and organic matter. Depending on the deposit, varying proportions of amorphous silica and crystalline silica (quartz) are found, which influences its uses (food, filtration, refractory materials, cement).
- High filtration fineness (microns) and high specific surface area
- Absorbent , filtering , deodorizing , inert
- Gentle abrasive action (cleaning, light polishing)
Properties and advantages
Thanks to its highly porous siliceous structure, diatomite is effective at absorbing moisture, filtering water (swimming pools, sand filters, diatomaceous earth filters), and deodorizing spaces. It also acts as a natural insecticide through mechanical action: its abrasive particles damage the cuticle of crawling insects (fleas, bed bugs, cockroaches, mites, ants, ticks), leading to their dehydration, without chemical toxicity . In food-grade grade, it is also used in targeted applications in agriculture (chicken coops, poultry), animal bedding, and animal products.
- Rapid absorption of liquids and odors
- Fine water filtration (impurities, toxins, particles)
- Natural pest control : helps fight against certain pests
- Natural , inert product, safe for homes and pets
Modern uses of diatomite
In the home: diatomite bath mat (absorbent and stable surface), closet deodorizer, humidity regulator, maintenance (gentle abrasion of certain surfaces). In the garden and poultry yard: spread in corners and sensitive areas to limit pests, secure chicken coops and perches. In technical applications: filters (swimming pools, industry), mineral fillers (paints, cement), refractory substrates. Its grade and fineness determine the dosage and application method (from spraying to dusting).
For the bathroom, our diatomite bath mats utilize the porous structure of the stone: they absorb water in seconds, remaining dry and hygienic. A light brushing or fine sanding is all it takes to restore their performance if they become soiled ( limescale, deposits ).
Precautions and best practices
Use diatomaceous earth according to its grade (food grade vs. technical grade). Avoid inhaling fine dust: apply a thin layer in a well-ventilated area, then clean after use. Do not confuse amorphous silica (diatomite) with crystalline silica (quartz, which is potentially irritating with chronic inhalation). Keep out of reach of children and adjust the dosage according to the intended use.