Vibrant blues and aqua swirl together in Graziela Kaufman’s opal chalcedony earrings from the Captiva collection ($2,950). This unique hybrid stone was mined in Peru, and its color combination spoke to the Brazilian-born designer’s passion for earthly beauty. “This color encompasses everything that I love—nature, sky, oceans, forests, life . . . nature in its perfection,” says Kaufman.