Warm and cold multi purpose massage and healing crystal, approx. weight 300gms in display box with basic instructions for use, have fun experimenting. Can be used both warm and cold, warm it quickly relaxes muscle and allows the absorbtion of essential mineral salts, nutrients and trace elements into aching bones and muscle. It also appears to be effective on headaches and some migraines, the hygroscopic properties decreasing pressure. Its anti-bacterial, anti-viral and anti-biotic properties mean it is self cleansing and aids the healing process at a celular level. Cold it quickly draws heat from the body and reduces infection and inflammation, burns and bruising whilst disinfecting and cleansing. For best results heat in microwave for 20 seconds (does not damage crystal or affect its therapeutic qualities), check that it is not too hot and apply directly to area of body requiring treatment, the crystal acts quickly and can be applied for extensive