Alum stone is a mineral rich in potassium, extracted from a rock with a flaky appearance. Our alum stone is made of 100% potassium alum, extracted by solar evaporation in the saltworks. Potassium alum stone is the purest alunite in the world produced in the Panama smelters. This polished square alum stone is 100% natural and very economical. Effective against perspiration because it regulates it without clogging the pores of the skin, it is also an antiseptic which eliminates the bacteria responsible for bad odors. This alum stone stick stops micro-cuts, relieves razor burn and acts as a soothing agent on superficial burns. Perfect for men who shave frequently.