18kt yellow gold 18kt yellow gold petit Chateleine peridot and diamond stud earrings from DAVID YURMAN featuring butterfly fastening, stud design, peridot, round cut diamonds 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..