18K Diamond Ruby Emerald Onyx Brooch

One late twentieth century 18 karat yellow gold brooch with diamonds and colored stones. The center of the brooch is set with one South Sea cultured pearl measuring approximately 15 millimeters, lightly blemished and fine luster. There are four bezel set oval cabochon cut rubies measuring about 8 x 6 millimeters, weighing approximately 2.50 carats each, fine color, moderate to heavily included. There are twelve round bezel set cabochon cut emeralds measuring approximately 3.7 to 4.3 millimeters each, fine color, moderate to heavily included. There are four pear shaped ribbed black onyx stones measuring approximately 18 x 11 millimeters. The brooch is bead set with 159 full cut diamonds totaling about 2.78 carats, averaging G in color and SI1 in clarity. Impressed hallmark "750" along the reverse. Impressed maker's mark "JS" along the reverse.
Brooch diameter: 72mm depth: 24mm; Gross weight: 40.4 dwt.
Condition Report: Please contact us for a detailed condition report. Please note that the lack of a condition statement does not imply perfect condition. Email condition@revereauctions.com with any condition questions.