Designer Katey Brunini is a master of marrying the stunning with the strange. At the center of her Robot Heart necklace: a huge electric-blue Australian opal shot through with earthy brown swirls. But it’s a tiny LED light—tucked behind a diamond-encrusted gold lightning bolt—that gets this heart beating. The piece was inspired by the relationship between Jungian psychology and Tibetan Buddhism, which Brunini calls “the Western and Eastern paths to the heart.” The 18k gold lightning bolt pays homage to Vajrayana, an ancient system of Buddhist thought sometimes referred to as the Thun