VAN CLEEF & ARPELS 18K White Gold Grey Mother of Pearl Diamond Butterfly Pendant Necklace. This elegant necklace is crafted of 18 karat white gold and features a butterfly shaped pendant with a grey mother of pearl inlay and is accented with diamonds with a total approximate carat weight of 0.06 carats. This is one of a kind necklace with the sophisticated style only from Van Cleef & Arpels!