(1) Fiberized asbestos or u2018magnesiau2019 is a component of many insulating compositions which may also contain clay, kieselguhr , fossil meal, flax, hemp or jute waste and other materials.(2) Conventional beer filters are made of either densely packed fibres or a dusty material called kieselguhr , which consists of fossilised hard-walled algae called diatoms.
