igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness 6 on Mohs scale, grayish-white to tan color, dull luster, vesicular and frothy texture with trapped gas bubbles, specific gravity less than 1.0 allowing it to float on water.
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Physical properties
Hardness 6 on Mohs scale, grayish-white to tan color, dull luster, vesicular and frothy texture with trapped gas bubbles, specific gravity less than 1.0 allowing it to float on water.
Formation & geological history
Formed from rapidly cooling, highly gas-saturated felsic volcanic ejecta during explosive volcanic eruptions, commonly associated with subduction zone volcanoes.
Uses & applications
Used in lightweight concrete aggregate, abrasive landscaping materials, personal care pumice stones for skin exfoliation, and industrial filtration.
Geological facts
Pumice is one of the only rocks capable of floating on water due to its extremely high porosity formed by trapped volcanic gases.
Field identification & locations
Easily identified by its extremely low density, light weight, and abundance of small gas cavities; found worldwide in volcanic regions.
