Evolution Salt�s Heart Crystals are not only the ideal hand sanitizing crystals, but they are the perfect grounding stones. Carry them anywhere - your pocket, your purse, your briefcase, or even your child's school back pack. Can also be used for massage/spa treatment or as a deodorant/cleansing bar. Evolution Salt�s artesian, hand carved massage stones are made of our ethically sourced, 100% natural & raw Himalayan Crystal Salt. These massage stones are exfoliating, mineralizing & gently detoxifying providing the ultimate, deep relaxation your body craves. The skin is our largest organ, absorbing minerals, as well as toxins; therefore there is enormous benefit in using Himalayan Crystal Salt Massage Stones over river stones. The magnesium content in salt stones help to relax muscles & melt away tension, while the 84 minerals & trace elements are beneficially absorbed to alkalize the body & gently draw out toxins.