igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness 6 on Mohs scale, pale gray to white color, dull luster, amorphous volcanic glass structure, very low specific gravity allowing it to float on water.
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Physical properties
Hardness 6 on Mohs scale, pale gray to white color, dull luster, amorphous volcanic glass structure, very low specific gravity allowing it to float on water.
Formation & geological history
Formed from rapidly cooling, frothy felsic lava ejected during explosive volcanic eruptions.
Uses & applications
Used in lightweight concrete, abrasive products, horticulture, and personal care items like pumice stones.
Geological facts
Pumice is the only rock known to float on water due to its high concentration of trapped gas bubbles.
Field identification & locations
Easily identified by its extremely low weight and vesicular, sponge-like texture filled with tiny cavities; found worldwide near young volcanic regions.
