Watermelon tourmaline is a unique variety of tourmaline gemstone that exhibits a striking combination of colors resembling a watermelon. It is highly valued for its vibrant hues and distinctive patterns. A watermelon tourmaline slice refers to a slice of this gemstone that has been cut and polished to showcase its inner beauty.

Watermelon tourmaline slices are popular in jewelry making and collectors often seek them out due to their unique appearance. They can be used to create pendants, earrings, rings, and other forms of jewelry. The slices are typically cut thin to maximize the color display and can be set in various metal settings or used as a centerpiece in a design.