Pumice is a rock composed of volcanic glass. You shouldn't eat it period.
Eating pumice is a very bad idea. Pumice is an igneous rock, and it would probably damage your digestive system if your stomach acid doesn't dissolve it. Even if your stomach did dissolve it, there could be lethal toxins in a rock like pumice.
Floating rocks: pumice. Non-floating rocks: all but pumice. Pumice can float on water because its density is so low, due to trapped bubbles of air which formed during its solidification from lava.
Pumice forms from the eruption of volcanoes. It occurs from hot pressurized rock that gets ejected from the volcano during eruption.
Tephra.. (not pumice - Pumice is the light stone which forms during an eruption)
Pumice.
No. Fly ash is ash left over from burning coal. Pumice is a porous rock produce during some volcanic eruptions.
Pumice forms from the eruption of volcanoes. It occurs from hot pressurized rock that gets ejected from the volcano during eruption.
Tephra.. (not pumice - Pumice is the light stone which forms during an eruption)
Not usually, unless it was buried after forming. Pumice is formed during volcanic eruptions from material that is blasted into the air before falling back to earth.
Pumice can be white, gray, or even pink.
No. Pumice is not magnetic.
No. Pumice is inorganic.