igneous
Pumice
Felsic volcanic glass
AI-generated identification · may be incorrectHardness 6 on Mohs scale, white to gray color, dull luster, highly vesicular amorphous structure, specific gravity less than 1.0.
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Physical properties
Hardness 6 on Mohs scale, white to gray color, dull luster, highly vesicular amorphous structure, specific gravity less than 1.0.
Formation & geological history
Formed from rapidly cooling, gas-rich felsic lava during explosive volcanic eruptions.
Uses & applications
Used in lightweight concrete, abrasives, horticulture, and personal care products.
Geological facts
Pumice is the only rock that can float on water due to its trapped gas bubbles.
Field identification & locations
Identify by its extremely light weight and porous, frothy texture; commonly found near active or recent volcanic regions.
