Raw natural pieces of Black Tourmaline. These would be ideal for placing around the home, carrying in your pocket or placing on the body during a crystal healing. For size, see the photograph with the coin. 
 
Photograph 3 shows how you can create a grid around the home for protection, by placing one piece of tourmaline along side a chunk of selenite in all four corners of the home or on window sills. The tourmaline will offer protection from anything outside of the home and the selenite will bring in a light bright energy to transform anything negative.

These crystals are standard stock and one will be selected intuitively for you. You may not receive the item in the photograph.