igneous
Pumice
Pumice (Volcanic Glass Foam)
AI-generated identification · may be incorrectHardness 6 on Mohs scale, white to gray or tan color, dull luster, amorphous volcanic glass structure with abundant gas vesicles.
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Physical properties
Hardness 6 on Mohs scale, white to gray or tan color, dull luster, amorphous volcanic glass structure with abundant gas vesicles.
Formation & geological history
Formed during explosive volcanic eruptions when frothy, gas-rich felsic lava cools rapidly, trapping air bubbles.
Uses & applications
Used in lightweight aggregates, concrete production, abrasive personal care products, and horticulture.
Geological facts
Pumice is one of the few geological specimens that can float on water due to its extremely high porosity.
Field identification & locations
Easily identified by its exceptionally low density, light weight, and pale, vesicular texture found around volcanic regions.
