18kt yellow gold and sterling silver Châtelaine peridot and diamond stud earrings from DAVID YURMAN featuring 18kt yellow gold, sterling silver, peridot, pavé-set diamonds, post-back fastening and for pierced ears. These earrings come as a pair.. To ensure the shine and polish of your David Yurman piece, wash with a little non-bleach, soapy water and wipe clean with a soft cloth..