What are Pink and Purple Tourmalines? Tourmalines are minerals that belong to the boron silicate group. They are composed of complex crystal structures that result in a variety of colors. Pink and purple tourmalines are two of the most sought-after colors of tourmaline. Pink tourmalines are known for their vibrant, bubblegum pink color, while purple tourmalines come in a range of shades, from light lavender to deep violet.