Dates to the Edwardian era, circa 1910.
Crafted with a 14K yellow gold top and a 10K yellow gold pin stem. Not hallmarked, but carefully acid tested.
Bezel-set with a very large natural turquoise in matrix inverted teardrop cabochon. The stone measures approximately 21 mm by just over 11 mm.
The stickpin measures 2.56" from top to bottom, with a top portion that measures 0.90" by 0.50". This piece weighs 3.6 grams.
Condition is very good, with no damages.