| Pumice | |
|---|---|
| [[|250px]] | |
| Type | Igneous |
| Essential mineral(s) | {{{Essential mineral(s)}}} |
| Accessory mineral(s) | {{{Accessory mineral(s)}}} |
Pumice is an igneous rock. It is the only known rock that can float on water, due to large airpockets in its core. It is mainly used as a grinding stone, to polish jewelery or sharp objects such as knives. Pumice is also used in making cinder blocks.