Pumice is an extrusive igneous volcanic rock formed through the rapid cooling of air-pocketed lava, which results in a low-density, high-porosity rock. Fine-grained pumice, or pumicite, is defined as minute grains, flakes, threads or shards of volcanic glass, with a size finer than 4 millimeters.
|Publication Subtype||Journal Article|
|Title||Mineral resource of the month: Pumice and pumicite|
|Contributing office(s)||National Minerals Information Center|
|Google Analytic Metrics||Metrics page|