Brooch in platinum and brilliant cut diamonds

Platinum brooch set with brilliant cut diamonds, of which 7 of 0.15 ct., 6 of 0.10 ct., 8 of 0.5 ct. and 59 baguette cut diamonds, each approx. 0.05 ct., marked Astor nks, 21.9 grams

Art Nouveau brooch in platinum studded with brilliant and rose cut diamonds.

Raymond C. Yard Diamond Penguin Brooch platinum, the brooch mounted with round brilliant-cut diamonds weighing approximately 2.50 carats in total, accented with black enamel, stamped "YARD". size 1-1/

Diamond Brooch platinum, the brooch mounted with round brilliant-cut diamonds weighing approximately 1.43 carats in total, and accented with a round-cut treated ruby for the eye, weighing approximatel

18ct yellow gold & platinum brooch, collet-set with 3x brilliant-cut diamonds, G colour, VS2, central diamond approx 0.12ct. Other two 0.08ct each. 3.8 grams, 5.7cm.

or Brooch. Platinum floral spray pendant brooch inlaid throughout with round brilliant cut diamonds and tapered baguettes. Includes (3) round brilliant cut diamonds measuring approx. 3.0mm each, (18)

A diamond, emerald and platinum broochdesigned as a cluster of marquise-cut diamonds and circular-cut emeralds, among ribbons of round brilliant-cut diamond pavé; estimated total diamond weight:

LADIES EQUESTRIAN DIAMOND AND PLATINUM BROOCH Consisting of 1-platinum pendant mounting, 48-round brilliant cut diamonds weighing approximately 74/100 carats total VS1-VS2 clarity, H color 5.30 grams.

A jadeite, diamond and platinum broochdesigned as an oval cabochon jadeite, measuring approximately 14.40 x 10.90 x 7.35 mm, within fluted mounting set with scrolling round brilliant-cut diamond pav&#

A diamond and platinum brooch designed as a polished starburst motif set with round brilliant-cut diamond; estimated total diamond weight: 1.60 carats.9.0 dwt.; Diameter: 2 1/4 in.

David Webb Porcelain, diamond, gold, and platinum brooch The hand painted porcelain flower, to the roped gold stem, enhanced by a bee set with round brilliant-cut diamonds; 1950s Platinum and yellow g

Ladies' exquisite circular platinum brooch, set with approx. ten rectangular cut sections of stunning Amethyst, alternating with settings containing round brilliant cut Diamonds. Measures approx. 1-3/

A shell cameo, diamond and platinum brooch-pendant the pink shell cameo depicting nymph holding a jug aloft, framed by 60 round brilliant-cut diamonds weighing approximately 1.50 carats, with diamond-

Platinum brooch displaying (3) panel of (30) round brilliant cut diamonds and (58) single cut diamonds. Apparently unmarked. Brooch weighs approx. 9.9 dwt (gross). From a Briarcliff, NY estate. Dimens

Platinum violin brooch having 0.38ctw round brilliant cut diamonds. Stamped PT900 0.38. Approx. length 1.5in., approx. weight 10.1 grams.

Filigree broochIn white gold 14 Karat and platinum, set with three brilliant-cut diamonds weighing respectively 0.40 ct and 0.20 ct (x2) approximately.Hallmark: 14k & P, K l : 1.3 cm L : 5.5 cm Weight

CARTIER, A DIAMOND, SAPPHIRE, EMERALD, ONYX AND PEARL PANTHERE BROOCH / PENDANT in platinum, designed to depict a panther running, its body jewelled with round brilliant cut diamonds and cabochon blue

Sapphire, diamond, and platinum flower brooch Designed as a bouquet set with cabochon sapphires, single, old European, baguette, and round brilliant-cut diamonds Platinum 2.125 x 1.625 in; Gross weigh

A diamond and platinum pendant brooch, Tiffany & Co."Enchant," 1996designed as a round brilliant-cut diamond dragonfly with sapphire eyes; estimated total diamond weight: 0.60 carat.3.6 dwt.; Length:

David Webb Rock Crystal and Diamond Brooch/Pendant 18k yellow gold/platinum, the brooch mounted with rock crystals beads on a gold frame, accented by round brilliant-cut diamonds weighing approximatel

Large Approx. 5.75 Carat Round Brilliant Cut Diamond, Platinum and 18 Karat Yellow Gold Brooch. Diamonds E-F color, VVS clarity. Unsigned. Very good condition. Measures 2-1/2" x 1-3/4". Approx. weight

An 18 Karat Yellow Gold, Platinum and Diamond Brooch, containing 15 round brilliant cut diamonds weighing approximately 0.75 carat total. Stamp: H 18K. 15.10 dwts.

Art Deco platinum, diamond, and fine emerald brooch / pin, composed of fifty-one mixed-cut diamonds including baguette and round brilliant-cut diamonds; approx: 5.50 ct tw., color: H-I, clarity: VS2 -

Crafted in 18K gold and platinum, accented by round brilliant-cut diamonds weighing a total of 3.02 carats, with G-H color and VS clarity; accented by a small cabochon ruby for the eye, weighing 0.42