Tuff is a rock that consists of more than 75 % pyroclasts of all particle sizes. Due to the volcanic gas inclusions, tuff is very porous and has an excellent water storage capacity.
Vermiculite is a hydrated phlogopite mica belonging to the group of clay minerals and is suitable for use in insulation, concrete, and as a refractory material.
Our silicon dioxide with embedded water is, unlike diatomaceous earth (kieselguhr), a volcanically formed amorphous silicate with high porosity and a high silicate content.