igneous
Pumice
Pumice (Volcanic Glass)
AI-generated identification · may be incorrectHardness of 6 on Mohs scale, pale gray to white color, dull luster, amorphous vesicular structure, and specific gravity less than 1.0 allowing it to float.
Identified More igneous →
Explore Pumice in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6 on Mohs scale, pale gray to white color, dull luster, amorphous vesicular structure, and specific gravity less than 1.0 allowing it to float.
Formation & geological history
Formed from rapidly cooling, gas-rich felsic lava during explosive volcanic eruptions, trapping gas bubbles within the glassy matrix.
Uses & applications
Widely used in lightweight concrete aggregates, abrasive personal care products like pumice stones, and industrial filtration media.
Geological facts
It is one of the only geological rocks that can float on water due to its extremely high porosity and trapped air bubbles.
Field identification & locations
Easily identified by its extremely low density, light color, and abundance of small vesicular pores; commonly found near explosive volcanic regions worldwide.
