14k Yellow & White Gold Ring with Tourmaline and Lab-Grown or Natural Round White Diamonds Green tourmaline has a depth that feels almost impossible to capture in a photograph. Depending on the light, its rich color shifts and reveals new layers, making every glance a little different from the last. Framed by a geometric bezel, the elongated center stone is joined by princess cut and round white diamonds that carry the Argyle pattern across the band. A stardust sandblast finish adds another layer of texture to the gold, creating a design that's every bit as dynamic as the gemstone at its center.