Exfoliated VermiculiteI'm another title
Crude VermiculiteI'm a title

More About Vermiculite

Crude vermiculite from the Palabora mine consists of golden/brown flakes which are carefully classified into five grades – each having a specified range of particle sizes.  The coarsest grade comprises particles ranging between 8mm and 2.8mm, while the finest grade consists of particles between 0.710mm and 0.250mm in size.

The loose bulk density of crude vermiculite varies with the grade, but is typically between 700 and 1100 kg/m3.


The exfoliation process is carried out commercially by passing crude vermiculite through a furnace chamber in a controlled manner.  The crude vermiculite then expands at right angles to the cleavage planes, producing concertina-shaped particles many times their original volume.    Exfoliated vermiculite can be obtained from commercial exfoliators.

The majority of applications call for vermiculite in its exfoliated form.

Vermiculite is a very versatile mineral because of its thermal stability and inertness. It is clean to handle, odourless and mould resistant and also sterile due to the high temperature to which it is subjected in production.

Vermiculite ApplicationsI'm another title