Items can be returned for a full refund or exchange within .

: Applies only to individually registered white or yellow solitaire diamond designs (rings, pendants, or earrings) with a diamond of .18 carats or larger .

Since Tiffany does not buy back most items (especially silver collections like "Return to Tiffany®"), owners typically turn to the secondary market. Does Tiffany Buy Back Jewelry? - The Chubby Paw