Material:Natural rose quartz, Natural Obsidian, Opal, Natural Aventurine，Natural tiger eye jade,Natural jadeSize:approx.110*20mm(L*W)。Weight:approx.80gThis is one amazing crystal item, it is not only for crystal but also for massage, relaxing.It was made by natural opal crystal and high polished with smooth glossy appearance.It mainly used for your hand,foot,waist,neck,head and other bodies.Please a little gently massage to make it fit your body.This Natural Jade Guasha board is practical tools for beauty and health careIdeal massage tool both for professional therapist and for family use.Multi-functional, especially on face, neck and back massage.Ultra smooth surface in beautiful color and shape and will never hurt your skinSpecial Note: item might has a slight difference in color , Vein, Lines and shape because this is a natural material.