igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, pale gray to white color, vitreous to dull luster, amorphous glass foam structure, excellent buoyancy allowing it to float on water.
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Physical properties
Hardness of 6 on the Mohs scale, pale gray to white color, vitreous to dull luster, amorphous glass foam structure, excellent buoyancy allowing it to float on water.
Formation & geological history
Formed during explosive volcanic eruptions when frothy, gas-rich felsic lava rapidly cools and depressurizes, trapping gas bubbles within the glass matrix.
Uses & applications
Widely used in lightweight concrete aggregates, abrasive personal care products like pumice stones, and industrial polishing applications.
Geological facts
Pumice is one of the few rocks that can float on water due to its high porosity and trapped air vesicles.
Field identification & locations
Easily identified by its extremely low density, light weight, and pale, highly vesicular or frothy texture found near volcanic arcs worldwide.
