Black Tourmaline is the most protective stone there is. Black Tourmaline can repel and eliminate negative energy on and around you. 
 
You will recieve one intuitively selected Black Tourmaline. These are great for crystal healing on the body, making crystal grids and for meditation. I like to place a Black Tourmaline by the front door so it's like an "energetic shower" walking in the house.
 
Please note, Black Tourmaline is prone to flake off + break off, this may happen in the shipping process.