scarfpin

noun

1. A pin used to hold a scarf or tie in place.

   “Mr Carlyle listened to the faithful catalogue of his possessions. His fetter-and-link albert of gold and platinum was minutely described. His spotted blue ascot, with its gentlemanly pearl scarfpin, was set forth, and the fact that the buttonhole in the left lapel of his morning coat showed signs of use was duly noted.”