An Art Deco Diamond and Sapphire Pendant/Pin with Chain Necklace

With intricate filigree work, the pendant is crafted out of platinum and features a centered old mine-cut diamond, weighing approximately 0.40 carats, is further decorated with old mine-cut diamonds, weighing a total of approximately 2.25 carats, with G-I color and mostly VS clarity, with a few having SI clarity, and is adorned with baguette sapphires, weighing a total of approximately 0.50 carats, suspended from a 14K white gold barleycorn chain; the pendant is detachable and can be worn as a pin; chain length 23-3/4 inches; pendant measures 2-3/8 x 13/16 inches; weight 19.5 g.