Hat Pin, about 1935

This is an Art Deco plastic jewel; it is unclear what material it is made out of.It could be phenol formaldehyde, known generically as Bakelite.(Bakelite is the name given to objects made of phenol formaldehyde by Bakelite Corporation of Britain or the United States and, technically only to those pieces) It could also be celluloid (cellulose nitrate).In any event, it is an early twentieth century plastic.