Katachi Opal Necklace in Yellow GoldThis yellow gold opal pendant arranges square, rectangular, and round cut opals in continuous procession each catching light in its own way, a study in geometric collision. The design takes its cue from an old proverb: as iron sharpens iron, so one person sharpens another. We are not shaped in isolation. We are formed by the friends who challenge our assumptions, the conversations that expand our horizons, the people who don't always make life easy