This striking late-1920s sapphire, emerald, and gold necklace was tagged with a $50,000–$70,000 estimate before the New York Jewels Sale at Christie’s on June 15. It went for a hefty $152,000. “Beyond its sheer aesthetic beauty,” says Daphne Lingon, senior VP with Christie’s jewelry, “I think the strong price can be attributed to several factors, including rarity, individuality, and provenance.” And did we mention this three-strand, 15¼-inch collar was hand-wrought by Louis Comfort Tiffany himself? Never mind that it’s been off the market for almost a century. “It had been owned by the same family since its purchase in 1928 and had never before been offered at auction,” says Lingon. “Louis Comfort Tiffany’s works come up only every few years on average.” In other words, we’ll be waiting a while for another luminous stained-glass-like stunner.