Tourmaline has a variety of colors. Iron-rich tourmalines are usually black to bluish-black to deep brown, while magnesium-rich varieties are brown to yellow, and lithium-rich tourmalines are almost any color: blue, green, red, yellow, pink, etc.
Pink Tourmaline is said to be a powerful stone for protection, especially against psychic attacks. It is said to shield the aura and help connect with one's higher self.
