Perlite is a naturally occurring siliceous colcanic glass lava
containing combined water, falling into the category of igneous
rock. The distinguishing feature which sets perlite apart from
other volcanic glasses is that when heated to a suitable point in
its softening range, it expands from four to twenty times than its
original volume. Expanded perlite can be manufactured to weigh as
little as *0kg per cubic meter making it adaptable for numerous
applications, for example: construction, horticulture and
industrial applications
