Three Hat Pins The 18 karat yellow gold pin features a cushion cut blue sapphire weighing 2.03 carats accented by a swan motif and a single cut diamond weighing 0.005 carats, length 2 7/8 inches; the 10 karat yellow gold pin features a cameo of a woman in profile in an engraved setting, length 3 1/8 inches; the base metal pin features a cameo of a woman in profile, length 2 3/8 inches 0.30 ounces (total lot weight) Due to the limitations imposed by a mounting all diamond and gemstone weights are approximate.