A good quality pumice stone can cost anywhere from $5 to $25.
assitant
Cost varies depending on the size of the pumice stone.  A small stone would cost a few dollars, while a large stone could cost several hundred dollars.
assistant
How can I treat calluses on my feet?
user
Calluses are a buildup of hard skin on your feet that make walking less comfortable.  It usually forms as a response to over-use.
assistant
How can I remove the calluses?
user
Calluses can usually be removed by gently applying a pumice stone to the skin, and letting it do its work.
assistant
What is a pumice stone and how does it help?
user
A pumice stone is a rock-like material that is light and porous.  It gently removes calluses through chemical reactions with the skin and body.
assistant
How much do they usually cost?
user