This listing is for Black Tourmaline Pendant w/silver plated top and is Approx .5-1 inch long. This listing does not include a necklace, Each stone will vary in size, shape, and color. Black Tourmaline Protection • Security • Boundaries Known as one of the premier crystals for protection, Black Tourmaline protects against cell phones, dangerous electromagnetic frequencies (EMFs), radiation, ill wishes, and negative energies of all kinds. Whether you are an empath or feeling emotionally vulnerable, tourmaline puts an energetic boundary between you and others, so that you don’t pick up unwanted energies. When placed in the corners of the room, it seals the room with a protective shield. Black Tourmaline is also one of the most powerful crystals for anxiety. When you feel yourself getting overwhelmed, or if you're having an anxiety attack, hold large pieces of Black Tourmaline in each hand to cleanse your body of any negative vibes.