This Cartier double band ring in bi-color gold and sapphires is stylish and modern, dating from the 1990s. The upper yellow gold band is channel-set with a central line of nine square step-cut sapphires, sitting above a plain polished broad band of white gold, both bands angled in opposition and tilted intriguingly off the horizontal. Wearable as part of a mixed-metal ring stack, and collectible in other gemstones, this versatile Cartier band with its streak of vivid blue sapphires is a classic with a place in every chic, modern collection.