Jewel Tones

Jewelry, from top: Multistrand blue topaz bracelet with 22-karat yellow gold clasp, $5,200; Nancey Chapman. Blue topaz, aquamarine, and 14-karat yellow gold necklace (worn as a bracelet), $2,375; Peruvian chalcedony and silver necklace (worn as a bracelet), $825; both, Anzie. Aqua bead multistrand necklace (worn as a bracelet) with a diamond and aquamarine clasp set in platinum, $35,000; Tiffany & Co.