Foot Pumice Stone A pumice stone can be a godsend for anyone with cracked or dry feet. Pumice is frothy lava that has hardened into a porous rock. The natural texture of these stones makes them work like sandpaper, which means they are perfect for buffing away dry skin. Though usually used on the foot, especially during a pedicure, pumice stones are handy for any area of skin that needs some heavy exfoliating. Be wary of the exact kind of pumice stone you use to exfoliate your skin. Some raw pumice stones are much too jagged and harsh to use on your skin. Opt for smooth pumice or exfoliating pumice stone beauty products to guarantee safe and successful results. Always check that the pumice stone is meant to be used for beauty, because harsher pumice can also be used for cleaning household objects, such as the toilet. How to Use a Pumice Stone To use a pumice stone properly, it's best to start with clean skin that has been softened by soaking in warm water. You can use a pumice stone on wet or dry skin, but wet tends to work best. Use a soft, circular motion to gently buff away the dry skin. Rinse the area to remove the dead skin once you're finished with the pumice. Apply a little lotion to help hydrate the area and prevent aggravating dry skin. If you have calluses or other areas with a build-up of dry skin, do not try to remove it all in one day. Use the pumice stone over several days or weeks, gently buffing away the skin a little each day. Never apply heavy pressure to the pumice, or you'll end up buffing away healthy skin as well as dead. This can cause sores, open wounds and possible infection. Product TypeUnitBS105BS115BS120BS130BS140BS150BS160BS200Ave.Densitykg/m3105115120130140150160200Ave.Thermal Conductivity (10°C)W/(m·K)0.0390.04250.0430.0440.0460.0470.0480.065Ave.Compressive StrengthMPa0.50.70.81.01.21.41.62.4Chloride Contentppm≤25Water AbsorptionVol%≤0.5Service Temp.°C-268 +480Lineal Expansion Coefficient1/°C9×10-6