Dates to the Victorian era, circa 1880.
Crafted in 14K yellow gold or better - possibly 15CT. Not hallmarked, but carefully acid tested.
Post-set with three coral rounds to form a shamrock motif. Finished with a gold bead in the center and a gold curved stem at the base.
The stick pin measures 1.90" from end to end, with a top portion that measures 0.50" by 0.47". This piece weighs 1.66 grams.
Condition is very good. Pin stem appears to have been shorted and resharpened at some point.