igneous
Pumice
Pumice (felsic volcanic rock)
AI-generated identification · may be incorrectHardness 6 on Mohs scale, color ranges from white to grey or yellowish, vitreous to silky luster, vesicular amorphous texture, specific gravity less than 1.
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Physical properties
Hardness 6 on Mohs scale, color ranges from white to grey or yellowish, vitreous to silky luster, vesicular amorphous texture, specific gravity less than 1.
Formation & geological history
Formed from explosive volcanic eruptions where frothy felsic lava rapidly cools and depressurizes, trapping gas bubbles.
Uses & applications
Used in lightweight concrete, abrasive products, landscaping, personal care stone for exfoliation, and horticulture.
Geological facts
Pumice is one of the few natural rocks that can float on water due to its extremely high porosity.
Field identification & locations
Easily identified by its extremely low density, light color, and abundance of gas vesicles. Found worldwide near volcanic regions.
