Black Tourmaline is a highly protective stone that is said to not only protect one from negative energy, but transmute it into positive energy. It is also said to help dispel fear, anger, anxiety, and feelings of unworthiness. Black tourmaline also helps in cleansing the aura, and keeping your energy grounded.
These beautiful palm stone pieces do vary in size, shape, and pattern so yours won't look like the pieces pictured below, but it will be beautiful.