Crystal Aurora Borealis Bead

These are crystal beads which have been coated with an irridescent coating making them "shimmer" with all different colors, hence the term "Aurora Borealis. Photo courtesy of: rumor_has_it

Aurora Borealis Opaque Faceted Glass Bead

Opaque faceted blue glass with an AB finish. This was a very popular bead and is found fairly commonly in many colors, but the AB finish is not always in good shape. Photo courtesy of: ~Belle