igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale. Colors range from white, grey, yellowish, to brown. Vitreous to dull luster, vesicular texture with extremely low specific gravity allowing it to float on water.
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Physical properties
Hardness of 6 on the Mohs scale. Colors range from white, grey, yellowish, to brown. Vitreous to dull luster, vesicular texture with extremely low specific gravity allowing it to float on water.
Formation & geological history
Formed from rapidly cooling, frothy felsic volcanic lava rich in gas bubbles. Often ejected during explosive volcanic eruptions.
Uses & applications
Used in abrasive cleaners, lightweight concrete aggregate, personal care exfoliants, and horticulture.
Geological facts
It is one of the only rocks that can float on water due to its trapped gas bubbles. It is extensively used in the stone-washing process for denim jeans.
Field identification & locations
Easily identified by its extremely low weight and sponge-like porous texture. Found globally in regions with past or present explosive volcanic activity.
