Try putting a piece in a glass of water and see what happens...
Pumice normally doesn't have any grains at all. It would be very unusual for it to have grains. Just like Obsidian, Pumice is cooled too fast to have any grains in it. One of the biggest differences between them is that Pumice is cooled with pockets of air while Obsidian has a glassy look.
Pumice can be white, gray, or even pink.
No. Pumice is not magnetic.
No. Pumice is inorganic.
how did pumice get here
No. Pumice does not have grains.
Pumice is nonmetallic.
Pumice.
Yes. Pumice is defined as being highly vesicular.
Pumice is an extrusive igneous rock, not a mineral.
Pumice is found after volcanic eruptions producing lava.