igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness 6 on Mohs scale, highly vesicular texture, light gray to tan color, vitreous to dull luster, specific gravity less than 1.0.
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Physical properties
Hardness 6 on Mohs scale, highly vesicular texture, light gray to tan color, vitreous to dull luster, 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, personal care products, and horticulture.
Geological facts
Pumice is one of the only volcanic rocks that can float on water due to its trapped gas bubbles.
Field identification & locations
Easily identified by its extreme lightness and numerous tiny holes; found globally near active tectonic zones.
