It is a kind of volcanic rock fragment , mostly in small peace massive, light colored, porous, also known as pumice or pumice rock.

The bulk density of pumice is small (0.3-0.4), it is a porous, light volcanic extrusive rock, most of them can float on the water surface. The pumice has rough surface, and the particle bulk density is 450kg / m3.

Features:

light weighted, high hardness, corrosion resistant, pollution free, no radioactivity , environmental friendly

Uses:

In daily life, it can be used to make skin keratin removing products.

Because of its porosity and good moisture retention, it is often used in horticulture.

In industry, it can be used as aggregate for making light weight bricks.

Natural pumice

porosity: 71.8-81%

water absorption: 50-60%

can float on water

Image display：