ANTIQUE YELLOW GOLD, SHADED ENAMEL DIAMOND AND OPAL BUTTERFLY PIN. Head centers old mine cut diamond weighing app. 1 ct.; shaded blue translucent enamel wings and body set with app. 66 graduated rose-cut diamonds; wings further enhanced by eight bezel-held, graduated round and oval opal cabochons - L: 2 7/8 in. Estimate $1,200-1,800