igneous
Pumice
Pumice
AI-generated identification · may be incorrectMohs hardness 6, gray to white color, vitreous to dull luster, amorphous volcanic glass structure, specific gravity less than 1.
Identified More igneous →
Explore Pumice in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Mohs hardness 6, gray to white color, vitreous to dull luster, amorphous volcanic glass structure, specific gravity less than 1.
Formation & geological history
Formed during explosive volcanic eruptions when gas-rich felsic lava cools rapidly, trapping gas bubbles.
Uses & applications
Used in lightweight concrete, abrasives, horticulture, and personal care products like pumice stones.
Geological facts
Pumice is one of the few rocks that can float on water due to its high porosity.
Field identification & locations
Easily identified by its extremely low weight and vesicular, frothy texture; commonly found near active or historical volcanic regions.
