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Pumice

A highly porous igneous rock, usually containing 67 – 75% SiO₂ and 10 – 20% AI203, glassy texture.  Used as concrete aggregate, heat and insulation, filtration, finishing glass and plastics, road absorbents, support for catalysts, adherent for uncured rubber products and possible substitute for asbestos.

Packaging:  50 lb. bag


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