(Above) Carved tanzanite bangle with Mexican fire opal, opal, tsavorite, and diamonds in 18k blackened gold; $94,500; Arunashi; 310-888-0123; arunashi.com Maya carved turquoise leaf ring in 18k yellow gold and enamel; $9,550; Brooke Gregson; sales@brookegregson.com; brookegregson.com Hand-carved Bardiglio Imperiale marble earrings in 14k rose gold with gray diamonds; $7,330; Ioanna Souflia; 44-207-254-9735; ioannasouflia.com Round cabochon ring in molten onyx with black diamonds in 18k blackened white gold; $16,637; Muriel Grateau; 33-14-020-4282; murielgrateau.com Carved green jade earrings with tsavorite, black agate, and champagne and white diamonds in 18k black gold; $15,800; Wendy Yue; 646-603-6946; wendyyue.com