Perlite and vermiculite both have some interesting properties which make them useful in a number of industrial applications. They are both used in a number of special industrial uses ranging from insulation in cryogenic tanks and insulation between tanks wall (perlite), to absorbent packing in lab packs (vermiculite), to filtration medias (perlite). They have been used as fillers in plastics, as aggregates in well cements, and as abrasives.