Aurora Borealis (AB) - Named for the northern lights, aurora borealis is a term for crystal stones that have a highly iridescent surface. The effect is achieved by vapor blasting the facets of the lower part of the crystals with an invisible, micro thin metal sheet. This stone was created by Swarovski® in 1955 in collaboration with Christian Dior. Also known as AB, the term now refers to any highly iridescent surface.
Bakelite - The trademarked name for synthetic resins and plastics developed by a US chemist. Jewelry pieces made of Bakelite, especially with animal and fruit motifs, were extremely popular in the US in the 1930s and are now considered collectors items. Though still a highly specialized category. Bakelite has had something of a renaissance in this country in recent years.
Biwa - A cultured pearl originally non-nucleated, grown in a freshwater mussel from Lake Biwa in Japan. Only those actually produced there should be called Biwas; others are simply called freshwater cultured pearls.