Adam's Fine Jewellery & Watches 15th September 2020 at 4pm

136 T uesday 15 th S eptember 2020. S tarting at 4 pm 224 A PAIR OF LATE 19TH CENTURY ONYX AND DIAMOND PENDENT EARRINGS Each elongated onyx drop highlighted with a rose-cut diamond cap, to a graduated old brilliant and single-cut diamond surmount, mounted in silver and gold, diamonds weighing approximately 1.20ct total, length 6.4cm € 1,500 - 2,000 225 AN OPAL, DIAMOND AND ONYX COCKTAIL RING The oval-shaped cabochon opal weighing approximately 30.00cts within a brilliant-cut diamond frame, between similar- ly and baguette-cut diamond shoulders, to a black onyx gallery, mounted in 18K gold, diamonds approximately 2.50cts total, ring size M½ € 5,000 - 6,000 226 A SINGLE-STONE DIAMOND RING The round brilliant-cut diamond weighing 0.91ct within a four- claw setting, between channel-set princess-cut diamond shoulders, remaining diamonds approximately 0.60ct total, ring size J € 2,000 - 3,000 Accompanied by a report from the GIA laboratory in America stating that the diamond weighing 0.91ct is G colour,VS1 clarity. Report number 17522856 (laser inscribed), dated July 25th 2008 227 A PAIR OF GEM-SET PENDENT EARRINGS, BY MARGHERITA BURGENER Each elongated onyx drop, suspended from square-cut ruby and diamond-set connectors, to a rectangular-cut aquamarine surmount, mounted in 18K gold, maker’s marks MB, Italian assay marks, with maker’s case, length 7cm € 2,800 - 3,200 228 A DIAMOND THREE-STONE RING Composed of three brilliant-cut diamonds, each within a four-claw setting, mounted in 18K gold, central stone approximately 0.80ct, side stones approximately 0.70ct each, ring size O € 3,000 - 4,000 229 A DIAMOND RING Designed as a continuous foliate lattice with honeycomb detail, accented by brilliant-cut diamonds throughout, mounted in 18K gold, ring size N € 1,000 - 1,500