The 3/4 Three Quarter Round Basalt Stone Is Perfect Shaped To Applied On The Backside, Stomach And Lower Back Heat To Relieve Muscular Tension, Especially In The Thigh Area During Hot Stone Massage Treatment. Basalt Rock Material Is Originally Found Deep Within A Volcano Where It Remains For Hundreds Of Millions Of Years, Gaining All Of Its Natural Properties. All Basalt Is Rich With Iron And Magnesium, Which Make This Stone Very Effective In Massage Treatments. Basalt Is Excellent For Holding Heat For Long Periods Of Time And Has Very Low Radiation Which Makes This Rock A Much More Healthy And Beneficial Stone For Use. We Use Natural Black Basalt Rock As The Only Material, All Stones Were Shaped And Polished By Traditional Handcraft, No Wax, Dyestuff, Chemicals Were Applied During The Production. 10 Pieces Per Pack. specifications: unique Shape Can Be On The Backside, Stomach And Lower Back Heat To Relieve Muscular Tension, Especially In The Thigh Area. popularly Used To Apply Pressure To Muscles, Releasing Tension. the Sharp Edge All Around Is Perfectly Designed For Guasha Massage. excellent For Holding Heat For Long Periods Of Time rich With Iron And Magnesium. shaped And Polished By Traditional Handcraft, No Wax, Dyestuff, Chemicals Were Applied. 100% Natural Black Basalt Has No Wax, No Dyestuff, No Chemicals, No Radiation. increases Circulation, Facilitating Maximum Blood For Optimum Body Function. vaso-dilation Of Blood Vessels Causing An Increase In Blood Flow Around The Body. providing Important Energies To Keep The Body Functioning Efficiently. increase The Pulse, Therefore The Heart Pumps Faster. increases Cell Metabolism, Thereby Increasing The Rate At Which The Body Processes Nutrients And Toxins. increase Lymphatic Function, Thereby Increasing Detoxification, And Increasing Cleansing And Elimination. creates A Feeling Of Balance And Harmony. gives The Client A Deeper Sense Of Relaxation More Quickly. less Tiring For The Therapist.