22kt and 18kt Gold and Black Opal Pendant Necklace, Zaffiro, the free form pendant centering a bezel-set Australian boulder opal, granulated accents and diamond melee, suspended from a blue cord necklace, lg. 15 1/2 in., signed and boxed. Note: Jack and Elizabeth Gualtieri are the founders of the Zaffiro gallery based in Portland, Oregon. The national award-winning designers specialize in granulated custom jewelry in gold and platinum. For other examples of their work see lots 91 and 92.