Amethyst roller and Gua Sha tool   Amethyst stone has property of calming and soothing nervous system. Especially good to use amethyst tools before go to sleep. Amethyst helps people who suffer with insomnia and nightmares. Both tools increase Qi and Blood circulation to the surface of the skin, relieve jaw tension and reduce puffiness by increasing lymph flow. Attention: Colors of natural stone can vary !