Irene Neuwirth 18K rose gold and one-of-a kind watermelon tourmaline, by special order, Irene Neuwirth, Los Angeles, 626.799.3109. Suzanne Felsen 18K yellow gold, watermelon tourmaline, and diamond ...

They come in hot pink. And red and orange. And a spectrum of greens. There is a watermelon variety, too, which is exactly what it sounds like. But the most prized of tourmalines is the Paraíba. The ...