The aurora borealis treatment (AB) was developed in 1952 by Swarovski, and the jewelry world was never the same. See how much more light comes into place with borealis involved ... This grouping includes a necklace, a spectacular brooch, and two pairs of earrings. Condition is vintage good to very good. They are versatile pieces for accessorizing just about any 1950s-1960s ensemble. Thank you for looking!