Antique Italian pin with large deep red coral, diamonds and onyx

Automatic translation from Danish.

Large antique Italian pin of gold and oxidized silver, adorned with a large dark red coral cabochon, diameter approx. 15 mm, and an onyx cabochon, both surrounded by numerous single-cut diamonds, Color: Top Wesselton to Top Cape (G-K), Clarity: VS- single SI. Closing system works perfectly. The stamps are indistinct. According to gold testing, the gold is 14 kt. Dimensions of the coral top piece 3.2 x 3.5 cm and of the onyx closing part: 1.5, x 1.8 cm. Total length: 9 cm. Weight: 11.4 gr. From the 19th century