Encyclopedia > Pumice

Article Content

Pumice

Pumice is a porous type of igneous rock. It is considered a glass because it has no crystal structure. Pumice varies in density according to the thickness of the solid material between the pores; some samples float in water. It is widely used as an abrasive[?] for cosmetic purposes.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Great River, New York

... males. The median income for a household in the town is $78,399, and the median income for a family is $89,566. Males have a median income of $60,179 versus $58,125 for ...