For our RSJ Margarita Rimming Salt, we use pure Himalayan Pink Salt harvested from 200-million year old sea salt deposits. It is believed by many to be the purest salt found on earth. It is free from any toxins and pollutants. If we go to this much trouble for the salt that goes around the rim, imagine the lengths we go to when making the RSJ Margarita Mix that goes inside the glass.