Pumice, also known as pumice or pumice, has a small bulk density (0.3-0.4). It is a porous, lightweight vitreous acidic volcanic extrusive rock, and its composition is equivalent to rhyolite. The pumice here is a glassy lava with dense pores formed by the condensation of molten magma during volcanic eruptions. Its pore volume accounts for more than 50% of the rock volume. The surface of pumice is rough, the particle bulk density is 450kg/cubic meter, and the loose bulk density is about 250kg/cubic meter. Natural pumice has a porosity of 7l.8-81 and a water absorption rate of 7l.8-81. is 50-60. It is named because it has many pores, is light in weight, has a bulk density of less than 1 g/cubic centimeter, and can float on the water. It is characterized by light weight, high strength, acid and alkali resistance, corrosion resistance, no pollution, no radioactivity, etc. It is an ideal natural, green and environmentally friendly product.
China is very rich in pumice resources. Pumice minerals are distributed in the vast volcanic distribution areas, mostly in the northern region. The quality is better and the eruption age is relatively new. Water pumice, commonly known as honeycomb stone, Jiangmo stone and pumice, is produced near Tianchi in Changbai Mountain in the southeast of Jilin Province. The stone is mostly white, off-white, milky white, light yellow and other colors. It is porous and light and can float on the water.