Pierre Ponce (Pumice Stone)
It is presented in its raw black form. This rock is very porous and is used as an exfoliant on damp skin to remove calluses and dead skin from the feet and elbows. The skin is then softened and soft to the touch. It is also a very good ally against hair regrowth.
Pumice is created when superheated, highly pressurized rock is released from a volcano. The frothy configuration of pumice occurs due to simultaneous rapid cooling and rapid depressurization.