igneous
Pumice
Pumice
AI-generated identification · may be incorrectHardness 6 on Mohs scale, white to grey color, vitrified/silky luster, amorphous glassy structure, specific gravity less than 1.
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Physical properties
Hardness 6 on Mohs scale, white to grey color, vitrified/silky luster, amorphous glassy structure, specific gravity less than 1.
Formation & geological history
Formed from explosive volcanic eruptions containing high silica and gas content, cooling rapidly to trap gas bubbles.
Uses & applications
Used in lightweight concrete aggregates, abrasive stones, horticulture, and personal care products like exfoliating stones.
Geological facts
Pumice is one of the only rocks that can float on water due to its extreme porosity and trapped gas vesicles.
Field identification & locations
Easily identified by its very light weight, pale color, and abundant vesicular pores; commonly found near volcanic arcs.
