AN ANTIQUE FRENCH ONYX AND DIAMOND JABOT PIN in 18ct yellow gold, set with a cabochon cut onyx in...

AN ANTIQUE FRENCH ONYX AND DIAMOND JABOT PIN in 18ct yellow gold, set with a cabochon cut onyx in a border of rose cut diamonds, terminating in a further row of rose cut diamonds and a polished onyx cabochon, French assay marks, 9.0cm, 5.0g.