crystal deodorant stone. Hypoallergenic. Eliminates odor. Unscented. Non-staining. 24 hour protection. Thai crystal deodorant stone is made from crystallized natural mineral salts which kill odor causing bacteria. Thai crystal deodorant stone contains no harmful chemicals, oils, perfumes, or emulsifiers. It's just pure and natural. Free of aluminum chlorohydrate, chemicals, oils, perfumes, emulsifiers.