Encyclopedia > Pumice

  Article Content


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
Jan Smuts

... ended in 1902 he returned to politics as a member of the government of the Union of South Africa led by Louis Botha[?] until the outbreak of World War I when he rejoined ...