Black tourmaline is a popular and powerful grounding and protective crystal. It has a distinctive black color and a naturally textured surface. Black tourmaline is often used for spiritual and energy healing practices due to its ability to transmute negative energy into positive energy. It is believed to help shield the wearer from harmful electromagnetic radiation and negative energies emitted by others. Black tourmaline is also said to aid in releasing anxiety and stress, promoting mental clarity, and increasing physical vitality. It is commonly found in a variety of forms, including raw specimens, tumbled stones, and jewelry.