igneous
Pumice
Pumice (Vesicular Felsic Volcanic Rock)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, pale grey to white color, dull luster, amorphous glass structure with high porosity and low specific gravity allowing it to float on water.
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Physical properties
Hardness of 6 on the Mohs scale, pale grey to white color, dull luster, amorphous glass structure with high porosity and low specific gravity allowing it to float on water.
Formation & geological history
Formed through the rapid solidification and depressurization of frothy felsic lava during explosive volcanic eruptions.
Uses & applications
Used in lightweight construction aggregates, abrasive materials, cosmetics, and horticulture as a soil amendment.
Geological facts
Pumice is one of the only rocks that can float on water due to its trapped gas bubbles formed during cooling.
Field identification & locations
Easily identified by its extremely low density, light color, and frothy, vesicular texture filled with tiny holes. Commonly found in volcanic regions worldwide.
