This is an elegant Georgian period Halley's Comet brooch pin featuring a round faceted amethyst stone. The setting is unmarked and tests weakly under the 10K gold test, so most likely a lower 8-9K gold. The pin has a typical comet shape with larger stone on one end, narrow neck and flaring tail. The 'tail' is embellished with a flower as well.
This brooch weighs 2.2 gr. It measures 1.24" long. The stone is 8mm in diameter.
Condition is good, but for some untouched tarnish.
This is a sweet little brooch, and the amethyst stone is unusual.