igneous
Pumice
Pumice (Vesicular Felsic Igneous Rock)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, typically white, grey, or yellowish-brown, with a dull to earthy luster and a highly vesicular, frothy glassy structure.
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Physical properties
Hardness of 6 on the Mohs scale, typically white, grey, or yellowish-brown, with a dull to earthy luster and a highly vesicular, frothy glassy structure.
Formation & geological history
Formed from rapidly cooling, gas-rich felsic lava during explosive volcanic eruptions, preventing crystal growth and trapping gas bubbles.
Uses & applications
Used widely in lightweight concrete, abrasive products, landscaping, personal care exfoliating stones, and horticulture.
Geological facts
Pumice is one of the few natural rocks that can float on water due to its trapped internal air pockets.
Field identification & locations
Identified by its extremely low density, light weight, and abundance of small holes; commonly found near active or recent volcanic regions worldwide.
