igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, colors range from white to gray and yellowish brown, dull to earthy luster, amorphous volcanic glass structure, specific gravity less than 1.0.
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Physical properties
Hardness of 6 on the Mohs scale, colors range from white to gray and yellowish brown, dull to earthy luster, amorphous volcanic glass structure, specific gravity less than 1.0.
Formation & geological history
Formed during explosive volcanic eruptions when gas-rich felsic lava cools rapidly, trapping gas bubbles.
Uses & applications
Used widely 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 extremely high porosity.
Field identification & locations
Easily identified by its light weight and vesicular, sponge-like texture filled with small gas cavities; found near recent volcanic regions worldwide.
