Black Tourmaline chunks. Black Tourmaline in its rough appearnce is a very powerful stone. It helps to dissolve worry and anxiety. Black Tourmaline cleans energies and removes electronmagnetic energy such as, cell phones waves, computers, and wireless devices. It is an excellent addition to an offiice or room where these devices are used. Black Tourmaline will protect your space! Tourmaline chunks are sold individually and are a nice size but able to be held comfortably. Our stones are ethically sourced!