* Perlite. Perlite is an amorphous aluminosilicate rock with a relatively high water content. It is a natural mineral whose most characteristic property is that it expands when heated enough. So it is a very effective product as absorbent (avoiding an excess of hydration) or mattifying (eliminating unwanted shine on the skin). Ideal for exfoliants due to its great absorption capacity and its great work as abrasive.