Bug Brooch, Amber and Gold Insect Pin. Fun for Fall! Cute and spooky bug pin. Fun for Halloween and Insect Enthusiasts. This pin is marked 2RK, with a backwards R. It might be a Russian Jewelry mark for gold content. Russia is famous for their amber. The amber in this brooch is semi transparent. There are some little specs of material in the amber, visible under magnification. We believe this brooch is gold plated Brand; Vintage. Stone; Amber (this brooch has not been evaluated by an expert.) Metal; gold plated. Size; 1.75" x 1.75". Closure; Simple C clasp. Era; Mid Century, or earlier. Condition; very good vintage condition; small amount of plating loss on the back. We usually ship in one business day, Monday to Friday.