Superior protection from negativity, baneful magic, energy vampires, etc. This is a set of two very high quality black tourmaline crystals. They are in their natural state and are about 1 to 2 in long and 1/2 to 1 in diameter.  This is always my go-to for protection. I especially like tourmaline because it does not need to be cleansed as frequently, and when they are cleansed you can use water without damaging the crystal, or leave them out in sunlight or moonlight without them fading.