igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, grayish to white color, dull luster, vesicular texture, and specific gravity less than 1.0 allowing it to float on water.
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Physical properties
Hardness of 6 on the Mohs scale, grayish to white color, dull luster, vesicular texture, and specific gravity less than 1.0 allowing it to float on water.
Formation & geological history
Formed from explosive volcanic eruptions where gas-rich frothy lava rapidly cools and depressurizes, trapping gas bubbles.
Uses & applications
Used in lightweight construction aggregates, concrete manufacturing, abrasive products like pumice stones, and horticulture.
Geological facts
Pumice is one of the only rocks that can float on water due to its high porosity and trapped air bubbles.
Field identification & locations
Easily identified by its extremely lightweight nature and vesicular, spongy appearance full of tiny holes; found globally near active and dormant volcanic regions.
