Bentonite

Bentoniteis a kind ofclay.Bentonite usually forms fromweatheringofvolcanic ash.It is volcanic ash mixed with water under pressure.

The different types of bentonite have different proportions ofsodium,calciumorpotassium.They can absorb quite a lot of water, and are used as fillers and/orlubricatorsin various industries. The clay is used for many practical purposes.