Some of my customers have been asking about the meaning of "AB", Duracoat & Galvanized. What do all of these fancy terms mean regardingMiyuki Delica beads? The short...they're different finishes or coatings on the beads. The long...AB= Aurora Borealis effect (think Northern lights--wow!!), Duracoated beads have a longer lasting, more "durable" finish, to retain the colour & finish, Galvanized is a silver plating on the surface of the beads to retain the finish especially in metallic beads.