Art Deco Fan-shaped Brooch: Inspired from an Art deco fan-shaped Jabot pin which was platinum set with coral, onyx and brilliant-cut diamonds, made by an unknown jeweller eithe rin Europe or USA between 1920-1930. A Jabot is a style of neck tie on a woman's blouse that was fashionable in the 20s and 30s and this pin would have been used as a decorative fastening on the jabot.