Pumice is a porous glassy, porous and spongy volcanic rock that is formed as a result of volcanic events, resistant to physical and chemical factors. It contains numerous pores from macro to micro scale due to the sudden release of the gases in the body during its formation and its sudden cooling. Since the pores are usually unbound hollow, their permeability is low, and their heat and sound insulation is quite high. 
Acidic pumice, which is the most common and used type in the world, has a white dirty appearance and a grayish white color. The silica ratio is higher in acidic pumices, and it can be widely used in the construction industry. Since basic character pumices also have a higher proportion of aluminum, iron, calcium and magnesium components, it can be used in other industrial areas (for example as cake material in the fertilizer industry, in agriculture for soil improvement, etc..)