Pumice (volcanic rock)
Esquema
Jerarquía
<materials by composition> > inorganic material > rock > igneous rock > <igneous rock by origin> > extrusive rock > pyroclastic rock > volcanic glass
Descripción
A pale gray, porous variety of the volcanic stone rhyolite; it is composed of potassium aluminum silicate with small amounts of iron and alkalis. Pumice is used as an abrasive for polishing jewelry, cleaning metals, and smoothing vellum and parchment. In its solid form it is used as an abrasive and aggregate and in its powdered form it is used as a polish and abrasive.
Subcategorías
URI original del concepto
Otros términos
- puimsteen (vulkanisch glas) [nl]
- piedra pómez (vidrio volcánico) [es]
- Bimsstein [de]
- pierre ponce [fr]
- pedra-pomes [pt]
- pomice [it]