noun
- A fine-grained, porous volcanic rock formed from pumice; used as an abrasive or filtering material.
Usage: technical; geology
Examples
- Pumicite is commonly used in industrial abrasives and polishing compounds.
- The volcanic deposit contained significant amounts of pumicite suitable for commercial extraction.
- Pumicite's porous structure makes it effective as a filter medium in water treatment.
- Ancient pumicite deposits indicate past volcanic activity in the region.