Adam's Fine Jewellery & Watches Tuesday 14th September 2021

T uesday 14 th S eptember 2021 . S tarting at 6 pm 108 144 A DIAMOND HALF-ETERNITY RING The frontispiece composed of brilliant-cut diamonds, mounted in platinum, diamonds approximately 0.30ct total, with ‘Appleby’ case, ring size J½ € 400 - 600 145 A PAIR OF ONYX AND DIAMOND PENDENT EARRINGS, BY MARGHERITA BURGENER Each elongated onyx drop, suspending from four brilliant-cut diamonds within collet-setting, to a circular onyx plaque and brilliant-cut diamond surmount, mounted in 18K gold, signed Mar- gherita Burgener, with maker’s marks, Italian assay marks, with maker’s case, length 7.2cm 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 € 2,000 - 3,000 143 A TOURMALINE, ONYX AND DIAMOND COCKTAIL RING Of bombé shape, the central cushion-shaped tourmaline weighing 5.28cts, framed within alter- nating onyx and brilliant-cut diamond halos and between square and rectangular-cut diamond shoulders, mounted in 18K gold, diamonds approximately 2.50cts total, ring size M½ € 4,000 - 5,000