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40.00ctw Diamond and Platinum 16" Flower Necklace: 40.00ctw VS1-SI1/F-H Diamond and Platinum 16" Flower Cocktail Necklace - This item will come with a $455,000 insurance valuation report in the winning bidder's name by a graduate appraiser. A dramatic

5 days Left

40.00ctw Diamond and Platinum 16" Flower Necklace

GWS Auctions Inc.

Est. US$453,000-US$455,000

Platinum Multicolored Diamond, Emerald, And Sapphire Articulated Butterfly Brooch Pin With 18K: METAL: Platinum, 18K Yellow Gold; APPROXIMATE TOTAL DIAMOND WEIGHT: 3 ctw; GEMSTONES: Sapphires weighing approx. 1,25 cttw, Emerald weighing approx. 0.05 cttw, black diamonds weighing approx, 0.50 ctt

1 day Left

Platinum Multicolored Diamond, Emerald, And Sapphire Articulated Butterfly Brooch Pin With 18K

Hampton Estate Auction

Est. US$3,000-US$4,000

US$2,000(1 bid)

18K Yellow Gold, Platinum, Diamond and Ruby Necklace: A heavy 18K yellow gold chain necklace featuring a .950 platinum-framed pendant with an approx. 15ct ruby cabochon flanked by approx. 11ct of pavé set diamonds. Marked. 14-1/4in long. 91.43 dwt. | Yo

4 days Left

18K Yellow Gold, Platinum, Diamond and Ruby Necklace

Briggs Auction, Inc.

Est. US$10,000-US$15,000

US$5,000(1 bid)

Platinum and Approx. 2.67 CT Emerald And Diamond Rectangular Halo Ring: METAL: Platinum; APPROXIMATE TOTAL DIAMOND WEIGHT: 1.86 ctw; GEMSTONES: Emerald weighing approx. 2.67 carats; STAMPED: 10% IRID PLAT; CONDITION: Pre-owned, Very Good; ITEM WEIGHT (GRAMS): 9.58 g; MEAS

1 day Left

Platinum and Approx. 2.67 CT Emerald And Diamond Rectangular Halo Ring

Hampton Estate Auction

Est. US$5,250-US$7,000

Art Deco Platinum & Gold Diamond Necklace: Art Deco Platinum & Gold Diamond Necklace1930s-1950sVintage platinum and white gold necklace, composed of diamond-set crescent links supporting an openwork pendant drop, set throughout with single cut

1 day Left

Art Deco Platinum & Gold Diamond Necklace

Akiba Galleries

Est. US$3,000-US$5,000

Art Deco Platinum Diamond & Sapphire Circle Bow Necklace: Art Deco Platinum Diamond & Sapphire Circle Bow NecklaceCirca 1930s-1940sCircular openwork pendant necklace executed in platinum, centering a diamond-set hoop accented by a stylized bow motif. The cir

1 day Left

Art Deco Platinum Diamond & Sapphire Circle Bow Necklace

Akiba Galleries

Est. US$2,000-US$3,000

US$1,100(2 bids)

GIA 3.02ct Natural Black Australian Opal Platinum Diamond Filigree Ring w/ Report: Title: GIA 3.02ct Natural Black Australian Opal Platinum Diamond Filigree Ring w/ Report Description: A very fine quality 3.02ct natural black Australian opal is mounted in this stunning, vintage insp

Mar 11, 2026

GIA 3.02ct Natural Black Australian Opal Platinum Diamond Filigree Ring w/ Report

Hess Fine Auctions

Est. US$3,000-US$4,000

GIA 11.54mm Conch Pearl, 1.00ctw Diamond, Platinum Ring: GIA Certified 11.54mm Natural Light Pink Conch Pearl, 1.00ctw VS1-SI1/G-H Diamond and Platinum Ring - THIS ITEM WILL COME WITH A $46,000 INSURANCE VALUATION REPORT IN THE WINNING BIDDER'S NAME. An exc

5 days Left

GIA 11.54mm Conch Pearl, 1.00ctw Diamond, Platinum Ring

GWS Auctions Inc.

Est. US$45,000-US$46,000

Art Deco Platinum and Diamond Link Bracelet: METAL: Platinum; APPROXIMATE TOTAL DIAMOND WEIGHT: 6.50 ctw; TESTED: Platinum; CONDITION: Pre-owned, Fair; ITEM WEIGHT (GRAMS): 36.1 g; MEASUREMENTS: Bracelet 6 1/2 inches in interior circumference, 5

1 day Left

Art Deco Platinum and Diamond Link Bracelet

Hampton Estate Auction

Est. US$4,750-US$6,500

Wide Gold, Platinum, Diamond and Synthetic Ruby Buckle Slide Bracelet: 8 single-cut diamonds ap. .55 ct., one small round and 15 square-cut synthetic rubies, c. 1940, ap. 51.7 dwts. Length adjustable. Tests as 14 kt. Width 1 3/16 inches.

3 days Left

Wide Gold, Platinum, Diamond and Synthetic Ruby Buckle Slide Bracelet

DOYLE Auctioneers & Appraisers

Est. US$4,000-US$6,000

US$2,000(1 bid)

Platinum Diamond Engagement Ring & Eternity Band Set: Platinum Diamond Engagement Ring & Eternity Band SetCirca Late 20th CenturyPlatinum diamond ring set consisting of a solitaire engagement ring and a matching eternity band, sold together as a set. The

2 days Left

Platinum Diamond Engagement Ring & Eternity Band Set

Akiba Galleries

Est. US$6,000-US$8,000

Featured

RAYMOND YARD PLATINUM STAR SAPPH & DIAMOND BRACELET.: A signed, Raymond Yard, Art Deco, platinum bracelet set with approx. 18 ct. tw., medium blue, star sapphires and approx. 2.25 ct. tw. transition cut, natural diamonds of F-G color and VS clarity, 10mm

2 days Left

RAYMOND YARD PLATINUM STAR SAPPH & DIAMOND BRACELET.

William Smith Auctions

Est. US$7,000-US$10,000

GIA 7.31ct Gem Quality Radiant Cut Tanzanite Platinum Diamond Designer Signed Ring w/ Appraisal: Title: GIA 7.31ct Gem Quality Radiant Cut Tanzanite Platinum Diamond Designer Signed Ring w/ Appraisal Description: A spectacular 7.31ct radiant cut tanzie is the star of the show here in this design

Mar 11, 2026

GIA 7.31ct Gem Quality Radiant Cut Tanzanite Platinum Diamond Designer Signed Ring w/ Appraisal

Hess Fine Auctions

Est. US$3,000-US$4,000

Platinum, Gold, Ruby and Diamond ring: 18 ct., one cushion-shaped mixed cut ruby weighing 2.09 cts., 2 round diamonds ap. 1.50 cts. Size 6 1/2. With AGL report no. 1152723 stating Thailand origin, with gemological evidence of heat enhancem

3 days Left

Platinum, Gold, Ruby and Diamond ring

DOYLE Auctioneers & Appraisers

Est. US$2,500-US$3,500

Antique Platinum Topped 18K Yellow Gold Diamond Pendant Earrings: METAL: 18K Yellow Gold/Platinum; APPROXIMATE TOTAL DIAMOND WEIGHT: 0.65 ctw; TESTED: 18K Yellow Gold/Platinum; CONDITION: Pre-owned, Very Good; ITEM WEIGHT (GRAMS): 7.2 g; MEASUREMENTS: Earrings 1 3/8

1 day Left

Antique Platinum Topped 18K Yellow Gold Diamond Pendant Earrings

Hampton Estate Auction

Est. US$900-US$1,200

David Webb: An 18K Gold, Platinum and Diamond Ring: David Webb: An 18K Gold, Platinum and Diamond RingOf a high domed design centering round diamonds weighing approximately 3.36 carat, finished with a fluted gold mount, signed WebbSize: 7 1/218.5 grams

Mar 03, 2026

David Webb: An 18K Gold, Platinum and Diamond Ring

John Moran Auctioneers, Inc.

Est. US$3,000-US$5,000

Mar 11, 2026

Brand New Old Stock Never Worn Hamilton Platinum Factory Diamond Ultra Long Retro Deco Watch Case

Hess Fine Auctions

Est. US$2,500-US$3,000

David Webb: An 18K Gold, Platinum and Diamond Butterfly Brooch: David Webb: An 18K Gold, Platinum and Diamond Butterfly BroochOf a butterfly design featuring textured gold wings, accented by round, baguette and shield-shaped diamonds weighing approximately 7.25 ca

Mar 03, 2026

David Webb: An 18K Gold, Platinum and Diamond Butterfly Brooch

John Moran Auctioneers, Inc.

Est. US$7,000-US$9,000

Platinum and 18K Yellow Gold Step Cut Amethyst Brooch: METAL: Platinum/18K Yellow Gold; APPROXIMATE TOTAL DIAMOND WEIGHT: 5 ctw; GEMSTONES: Step cut amethyst approx. 32.29 carats; TESTED: Platinum/18K Yellow Gold; CONDITION: Pre-owned, Very Good; ITEM WEI

1 day Left

Platinum and 18K Yellow Gold Step Cut Amethyst Brooch

Hampton Estate Auction

Est. US$3,000-US$4,000

Platinum Pair of Art Deco Diamond Dress Brooches, Bush Family Provenance: straight baguette diamonds, marquise cut diamonds, round full cut diamonds, approx. 11.50ctw., H-J, VS1-VS2, tests platinum, 2 in. across complete, 2-1/4 in. length, 42.6 g Provenance: Estate of Flora

2 days Left

Platinum Pair of Art Deco Diamond Dress Brooches, Bush Family Provenance

Est. US$2,000-US$4,000

US$1,300(2 bids)

Platinum 4.18 Ct GIA Certified Old European Diamond Ring with 26 Accent Diamonds: Platinum 4.18 Ct GIA Certified Old European Diamond Ring with 26 Accent Diamonds This exquisite Platinum ring features a stunning GIA Certified Old European-cut diamond weighing 4.18 Ct. The diamond e

2 days Left

Platinum 4.18 Ct GIA Certified Old European Diamond Ring with 26 Accent Diamonds

Est. US$59,202-US$76,962

Platinum and Tapered Baguette Cut Diamond Engagement Ring Mount: METAL: Platinum; APPROXIMATE TOTAL DIAMOND WEIGHT: 0.20 ctw; STAMPED: Winston, Platinum, 3.11; CONDITION: Pre-owned; ITEM WEIGHT (GRAMS): 4 g; MEASUREMENTS: Ring size 7 1/2; Center will fit approx. 10

1 day Left

Platinum and Tapered Baguette Cut Diamond Engagement Ring Mount

Hampton Estate Auction

Est. US$375-US$500

1 day Left

Alex Sepkus Platinum Diamond Modernist Eternity Band Ring

Hampton Estate Auction

Est. US$1,400-US$1,800

David Webb 1960s Platinum 18K Gold Diamond Ruby Turquoise Bangle: David Webb 1960s Platinum 18K Gold Diamond Ruby Turquoise Bangle This stunning bangle bracelet from David Webb showcases a beautiful combination of platinum and 18K yellow gold. The bracelet features

7 hrs Left

David Webb 1960s Platinum 18K Gold Diamond Ruby Turquoise Bangle

Est. US$50,544-US$65,707

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