Surface Dimension: 0.5 x 0.4 x 0.1 inches; Ring Size: 7.5; Ring Size End: 7.5. 1 genuine watermelon tourmaline. Tourmaline is a coveted stone that comes in a wide range of colors from black to pink, green and blue. Crystals which display more than one color together are common. A cross-section of a watermelon tourmaline crystal reveals green on the outside and pink within.
