14k Yellow Gold Bracelet with Natural Tourmaline and Diamonds The Pillar Collection was inspired by an ancient Roman gold ring, making cabochon gemstones a natural addition. Long before gemstones were cut to maximize brilliance, they were polished into smooth domes that celebrated their color instead. Centered within the bangle, the cabochon strengthens the collection's connection to ancient jewelry while softening its architectural lines. It's a small change that gives the design an entirely different character.