A large, round, cabochon-cut tanzanite looks like a dome of ethereal blue ice. Accented by rose-cut light grey diamonds, green tourmaline and faceted blue spinels, the ring has a pavé halo of color-change garnets that morph from bluish-green to purplish-blue in the light (see second image). Set in 18k yellow gold, size 6. One of a kind.
