Med sized crystals
Shungite, , is a rare carbon-based and a non-crystalline rock that has the capacity to conduct electromagnetic and geothermal energy alongside protecting your body from the electromagnetic emissions caused by electronic appliances. Shungite is  used to protect from harmful electromagnetic radiation . They relieve stress, neutralize emotional disturbances and is quite effective in the treatment of joints, asthma, disturbances of the nervous system, sciatica and varicose veins. It helps to improve blood circulation, eliminate pain in diseases of the joints and muscles.