What type of rock is pumice igneous sedimentary or metamorphic

Pumice is an extremely low density, frothy, form-like or highly vesicular volcanic rock with a glass texture. This rock is highly porous, floats in water and has a rough surface.

This microvesicular, mostly pyroclastic rock forms when explosively ejected volatile rich magma rapidly cools, trapping some of the escaping gas bubbles.

The rapid cooling prevents mineral crystallization, forming a glassy texture.

Some specimen can, however, form during effusive eruption or lava flow. Such form towards the outer edges where rapid cooling traps escaping gas bubbles.

Please note that pumice is a natural volcanic glass, not a mineral.

Pumice composition

Natural volcanic glasses are amorphous or uncrystallized solids.

The name pumice comes from pūmex or spūma, which means foam-like, describing this rock’s frothy or foam-like appearance.

Rocks resembling pumice are called pumiceous.

Pumicite is powdered pumice with grains, flakes, threads, or shards less than 4 mm. It forms from highly explosive eruptions.

Pumice dust, on the other hand, has particles less than 0.25 mm, remains floating in the air f

what type of rock is pumice

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