igneous
Pumice
Volcanic glass froth
AI-generated identification · may be incorrectHardness 6 on Mohs scale, pale white to grey color, vesicular luster, amorphous volcanic glass structure, specific gravity less than 1.
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Physical properties
Hardness 6 on Mohs scale, pale white to grey color, vesicular luster, amorphous volcanic glass structure, specific gravity less than 1.
Formation & geological history
Formed during explosive volcanic eruptions when gas-rich frothy magma cools rapidly, trapping air bubbles.
Uses & applications
Used in lightweight concrete, abrasives, landscaping, personal care pumice stones, and horticulture.
Geological facts
Pumice is one of the only rocks that can float on water due to its extremely high porosity and trapped gas bubbles.
Field identification & locations
Easily identified by its extremely low density, light color, and abrasive vesicular texture; found near active or ancient volcanic regions.
