Silk gown with black jet embroidery, Oscar de la Renta ($6,990). oscardelarenta.com. Cushion-cut drop earrings, Tiffany & Co. ($35,000). 1414 Walnut St.; tiffany.com. Serpente bracelet, Bulgari ($42,700). Govberg Jewelers, 1521 Walnut St.; goverbergwatches.com

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