igneous
Pumice
Pumice (Volcanic Rock)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, typically light brown to gray in color with a dull luster. It has a vesicular, highly porous aphanitic texture.
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Physical properties
Hardness of 6 on the Mohs scale, typically light brown to gray in color with a dull luster. It has a vesicular, highly porous aphanitic texture.
Formation & geological history
Formed during explosive volcanic eruptions when gas-rich, frothy felsic lava rapidly cools and depressurizes, trapping gas bubbles.
Uses & applications
Commonly used in lightweight construction aggregates, abrasives, exfoliating personal care products, and horticulture.
Geological facts
Pumice is one of the only rocks that can float on water due to its extremely high porosity and trapped air bubbles.
Field identification & locations
Easily identified in the field by its very light weight and abundance of small gas cavities. It is found worldwide near active and ancient volcanic regions.
