igneous
Pumice
Vesicular Felsic Volcanic Rock
AI-generated identification · may be incorrectHardness is 6 on the Mohs scale. Colors range from white, grey, to cream with a dull to earthy luster and a highly vesicular, frothy amorphous glass structure.
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Physical properties
Hardness is 6 on the Mohs scale. Colors range from white, grey, to cream with a dull to earthy luster and a highly vesicular, frothy amorphous glass structure.
Formation & geological history
Formed from rapidly cooling, gas-rich felsic lava during explosive volcanic eruptions, trapping gas bubbles as it solidifies.
Uses & applications
Used widely in lightweight construction aggregates, abrasive soaps, personal care pumice stones, and horticulture.
Geological facts
Pumice is one of the only rocks that can float on water due to its extremely high porosity and trapped air bubbles.
Field identification & locations
Easily identified by its exceptionally lightweight feel and abundance of small gas cavities; found worldwide near active volcanic regions.
