B.S.K. vintage emerald green and aurora borealis brooch. Emerald color and aurora borealis faceted rhinestones set in a silvertone pinwheel design. The stones are secured in a prong or claw setting with a rollover clasp. The back has the B.S.K. on a metal plate.
The B.S.K. company was located in New York from the late 1940s through the mid 1980s.