18 carat Gold Brooch with Opals, Diamonds &

white gold brooch center bezel set with one oval cabochon cut White Opal, approximately 54.80 carats, accented with 46 full cut round Diamonds [I/I-1], approximate total weight 0.48 carats, 27.1 grams

AN 18 CARAT GOLD OPAL AND DIAMOND RING, an oval opal spaced by groups of old-cut diamonds, above a carved gallery and shoulders. Estimated diamond weight 0.50ct, hallmarked Birmingham 1902, ring size

18 carat gold pearl set brooch, with an oval opal at 12mm high above two bars, 4.7 grams, 51mm long

AN 18 CARAT GOLD SAPPHIRE AND DIAMOND LEOPARD BROOCH modelled in a walking pose, pavé-set throughout with round-cut sapphires and round brilliant-cut diamonds, with ruby-set eyes. Estimated total

18 carat gold amethyst and diamond set brooch, in the form of a basket of flowers with amethyst and diamond heads and sprigs of green enamel leaves, 57mm high, 20 grams

An 18 Carat Gold and Three Stone Opal Ring set with Diamonds... Stamped 18CT, Size N, weight 4.3g

An 18 carat gold platinum and diamond 'scribble' brooch by Paloma Picasso for Tiffany & Co., circa 1983, set with brilliant cut diamonds, approximately 0.10 carats total, signed Paloma Picaso, stamped

CARTIER: CULTURED PEARL AND DIAMOND-SET ROSE BROOCH, 1963 The 18 carat gold rose decorated with a cultured pearl bead and a brilliant-cut diamond, signed Cartier, numbered, maker's mark JC, French exp

BROCHE PIERRES DE COULEUR ET DIAMANTS GEM-SET AND DIAMOND BROOCH • French mark for 18 carat gold (750°/00) • Of asymmetric design, set to the centre with a stylised carved carnelian f

SAPPHIRE AND DIAMOND BROOCH, 1996 The openwork cartouche set with oval-cut sapphires and old brilliant and brilliant-cut diamonds, mounted in 18 carat gold, diamonds approx. 2.10cts total, London hall

A BLACK OPAL AND DIAMOND CLUSTER RING LONDON 1975The oval cabochon black opal within a surround of brilliant cut diamonds, approximately 0.48 carats total, the 18 carat gold shank stamped with sponsor

14K gold; 9 round brilliant-cut diamonds 0.18 carat, H-J/I clarity; measures 2-1/2 x 1-1/2 inches; weight 23.90 g.

GRIMA: BOULDER OPAL AND DIAMOND DRESS RING, 1977 The oval boulder opal in a pierced mount of textured wire with brilliant-cut diamond accents, mounted in 18 carat gold, signed Grima, workshop mark HJC

Ladies 14k yellow gold opal and diamond ring set with center crystal opal measuring approximately 15.41 x 12.03 x 5.85mm and weighing an estimated 6.18 carats and 8 single cut diamonds weighing approx

JOHN DONALD: DIAMOND, EMERALD AND SAPPHIRE BROOCH, 1989 Of 18 carat gold abstract design, the centre set with old brilliant and cushion-shaped diamonds, circular-cut sapphires and a cushion-shaped eme

BOUCHERON: ENAMEL AND DIAMOND SNAIL BROOCH, 1959 The snail body pavé-set with brilliant and single-cut diamonds, the shell with blue and yellow enamel decoration, mounted in 18 carat gold, signed

DIAMOND BROOCH BROCHE DIAMANTS • French import marks for 18 carat white gold (750°/00) • Numerous single- and brilliant-cut diamonds weighing approximately 1.30-1.50 carat total &#822

λ AN 18 CARAT GOLD, ENAMEL AND OPAL OVAL BOXGERALD BENNEY, LONDON 1975With green translucent enamel over a diamond pattern ground and the cover set with an oval opal6.5cm (2 1/2in) long110g grossWi

NO RESERVE - A BLACK OPAL AND DIAMOND PENDANT NECKLACE, CIRCA 1910, Made in 15 carat yellow gold, platinum and 18 carat yellow gold, the chain later added, Oval cabochon black opal, weighing approxima

Set with a marquise opal approx. 10x5mm, and 6 side diamonds approx. 0.18 carats, in yellow gold stamped 14K, size 4.75, 2.1gms.

KUTCHINSKY: LAPIS LAZULI AND DIAMOND-SET BROOCH, 1972 Designed as six interlocking lapis lazuli hoops with textured 18 carat gold terminals, with a cluster of brilliant-cut diamonds and cabochon lapis

AN 18 CARAT GOLD EN TREMBLANT BUTTERFLY BROOCH pavé-set with round brilliant-cut diamonds and cabochon emeralds and rubies. Estimated total diamond weight 0.50ct, hallmarked Birmingham 1993, 1.3cm

NO RESERVE - A PERIDOT AND DIAMOND BAR BROOCH, EARLY 20TH CENTURY, Made in 18 carat white gold and platinum, Octagonal step cut peridot, weighing approximately 3.71 carats, Single cut diamonds, Stampe

DESCRIPTION: 14k stamped setting with 3.18 carat pear shaped opal cabochon surrounded by ninety-two round brilliant cut diamond melee. MEASUREMENTS: 11.33 carats total diamond weight. 6.6 dwt. Size 8.