Natural cooling effect of Onyx facial roller helps with puffiness, wrinkles, dark circles, and promotes elasticity of skin. Black Onyx is a powerful stone well known for protection, release, and calming properties. The smooth-textured Onyx Roller helps improve circulation, increase oxygen flow to the skin, improve lymphatic drainage and eliminates toxins. Keeping it in the refrigerator prior to use will also help tighten pores, reduce puffiness, and release stress. Our Onyx Roller is made of 100% premium natural stone.