igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, colors range from white to gray and yellowish-brown, dull to earthy luster, amorphous volcanic glass structure, specific gravity less than 1.0.
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Physical properties
Hardness of 6 on the Mohs scale, colors range from white to gray and yellowish-brown, dull to earthy luster, amorphous volcanic glass structure, specific gravity less than 1.0.
Formation & geological history
Formed during explosive volcanic eruptions when frothy lava cools rapidly, trapping gas bubbles within the glassy matrix.
Uses & applications
Used widely in lightweight construction aggregates, abrasive cleaning stones, exfoliating cosmetics, and horticulture.
Geological facts
Pumice is famously known as the only rock that can float on water due to its extreme vesicular porosity.
Field identification & locations
Easily identified in the field by its extreme lightness, vesicular texture filled with tiny gas cavities, and abrasive feel. Found near active and ancient volcanic regions worldwide.
