igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, typically white, gray, or yellowish, with a dull to earthy luster and a highly vesicular amorphous volcanic glass structure. It has a very low specific gravity and floats on water.
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Physical properties
Hardness of 6 on the Mohs scale, typically white, gray, or yellowish, with a dull to earthy luster and a highly vesicular amorphous volcanic glass structure. It has a very low specific gravity and floats on water.
Formation & geological history
Formed during explosive volcanic eruptions when frothy lava cools rapidly, trapping gas bubbles within the glass matrix.
Uses & applications
Used in lightweight concrete, landscaping, abrasive personal care products, and horticulture.
Geological facts
Pumice is one of the few rocks that can float on water due to its extreme porosity.
Field identification & locations
Easily identified in the field by its sponge-like appearance, lightweight feel, and numerous gas cavities. Found near recent or historical volcanic regions worldwide.
