A diamond collet necklace

Platinum Set with twelve round full-cut diamonds totaling 1.45cts. and graded H-I color and SI-I clarity 19.0" L 5.5 grams

Circa 1920, platinum Set with eight old mine and old European-cut diamonds totaling approximately 0.80 ct. and graded H-J color, VS-SI clarity 26 1/2" L 8.0 grams

A Tanzanite and diamond necklace part collet-set with an oval-cut Tanzanite, suspended from a pavé-set diamond panel, to an integral chain, stamped 750 18(Length: 40cm)

An 18ct gold diamond single-stone necklace. The brilliant-cut diamond collet and crossover bar, to the belcher-link chain with tubular and sphere beads. Hallmarks for Edinburgh. Length 45cms. Weight 1

A 9ct gold diamond necklace. The brilliant-cut diamond collet line drop, with similarly-cut diamond chevron sides and trace-link chain. Estimated total diamond weight 0.20ct. Hallmarks for Birmingham.

* An emerald and diamond necklace. The emerald cabochon drop, suspended from brilliant-cut diamond geometric panels, to the circular emerald cabochon surmount and brilliant-cut diamond collet accent b

(3493-1-A) CHOPARD - a 'happy diamonds' necklace. The free-moving brilliant-cut diamond collet within a square-shaped surround, to the plain surmount, suspending from a belcher-link chain. Signed and

A jade and diamond necklace. The carved and pierced jadeite panel, with brilliant-cut diamond collet drop, suspended from a trace-link chain. Estimated diamond weight 0.20ct. Length of pendant 5cms. L

An amethyst, split pearl and diamond necklace. Designed as two culture pearl and single-cut diamond collet graduated drops, suspended from an oval amethyst cabochon and split pearl cluster, to the spl

An 18ct gold diamond necklace. Designed as a series of brilliant-cut diamond collets, spaced along a trace-link chain. Estimated total diamond weight 0.45ct. Hallmarks for Sheffield. Length 56cms. Wei

An 18ct gold diamond necklace. Designed as a series of five square-shape diamond collets, to the double belcher-link chain. Estimated total diamond weight 0.60ct. Hallmarks for London. Length 51.6cms.

Tiffany & Co., Elsa Peretti Long Gold and Diamond 'Diamonds by the Yard' Chain Necklace 18 kt., 12 collet-set round diamonds ap. 1.70 cts., signed Tiffany & Co., Peretti, ap. 4 dwts. Length 36 inches.

A DIAMOND AND MOTHER-OF-PEARL 'HAPPY HEARTS' PENDANT NECKLACE, BY CHOPARD Of heart design, with a central glazed compartment revealing a floating brilliant-cut diamond within collet-setting, suspendin

A DIAMOND NECKLACE, the fine trace-link chain interspersed with brilliant-cut diamonds within collet-setting, suspending an openwork pendant set with old European and single-cut diamonds throughout, c

A Belle Epoque style diamond necklace, the principle old brilliant cut diamond in collet mount suspended form a graduated rose diamond set drop and lattice work centrepiece set with mixed old cut diam

RUBY AND DIAMOND NECKLACE, LATE 19TH CENTURY Composed of thirteen cushion-shaped ruby and diamond clusters graduating in size towards the centre, alternating with single diamond-set collets, suspendin

Gold, Sapphire and Diamond Necklace 18 kt., 45 collet-set oval sapphires ap. 13.80 cts., 78 collet-set round diamonds ap. 1.50 cts., ap. 25.6 dwts. Length 16 5/8 inches. C The Collection of Dr. Thomas

A DIAMOND LONGCHAIN SAUTOIR NECKLACE in the manner of Tiffany & Co Diamond by the Yard, comprising a single row of collet set diamonds totalling with 11.5-12.5 carats, tests as 18ct white gold, stampe

DIAMOND AND CULTURED PEARL NECKLACE in white gold with one part designed as polished semi-rigid bars and one part as round collet-set diamonds weighing approx. 0.60 ct holding one South Sea Tahitian p

Ladies' Italian 14 karat White Gold necklace. Comprised of seven collet set round brilliant cut Diamonds, held on a 16" length baby belcher chain with spring ring clasp. Marked "585". Weighs approx. 3

Including a 14k yellow gold necklace set with seed pearls measuring 4mm alternating with collet set diamonds (18.0"), a Victorian 14k yellow gold ring topped with seed pearls and emeralds and small ro

Gold, Colored Stone and Diamond Fish Link Necklace 18 kt., round rubies, sapphires and emeralds, 6 collet-set round diamonds ap. .60 ct., small round diamonds ap. 1.30 cts., 17 round emerald eyes, ap.

An 18ct gold emerald and diamond necklace. The pear-shape emerald collet, suspended from a brilliant-cut diamond foliate chevron, to the integral fancy-link back-chain. Estimated total diamond weight

BUCCELLATI: DIAMOND-SET NECKLACE Of textured openwork rectangular linking, each applied with six collet-set brilliant-cut diamonds, joined by triple bar links, on a concealed clasp, signed Gianmaria