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PLATINUM RING SET WITH MYANMAR SAPPHIRE AND DIAMONDS: Total weight gr. 8,9 Sapphire weight 8,47 ct Size 15 (IT) Report no. 38578 dated 12th November 2025 issued by the IGN Laboratory, Rome, certifying that the sapphire shows no evidence of heat treatment

3 days Left

PLATINUM RING SET WITH MYANMAR SAPPHIRE AND DIAMONDS

Est. €10,000-€12,000

€10,000

INTERNATIONAL ART SALEMilano, MILANO

PLATINUM NECKLACE SET WITH OLD EUROPEAN CUT DIAMONDS: Total weight gr. 46 Total diamonds weight approx. 12 ct Length 39 cm

3 days Left

PLATINUM NECKLACE SET WITH OLD EUROPEAN CUT DIAMONDS

Est. €8,000-€10,000

€8,000

INTERNATIONAL ART SALEMilano, MILANO

Art Deco Ruby, Diamond, Platinum, Gold Case Sto: Art Deco Ruby, Diamond, Platinum, Gold Case Stones: Square-shaped rubies weighing a total of approximately 0.60 carat; full-cut diamonds weighing a total of approxi

May 04, 2026

Art Deco Ruby, Diamond, Platinum, Gold Case Sto

Est. US$8,000-US$10,000

US$5,000

Heritage AuctionsDallas, TX

16 hrs Left

VAN CLEEF & ARPELS PAPILLON DIAMOND RING PLATINUM PT950

Est. US$6,975-US$10,230

US$25

NY Elizabeth Beverly Hills, CA

Stunning 152 Inch Platinum Diamond by the Yard Necklace 39.25 Ct: Stunning 152 Inch Platinum Diamond by the Yard Necklace 39.25 Ct This exquisite necklace features an exceptionally long design crafted from platinum, showcasing a stunning total of 492 diamonds that w

2 days Left

Stunning 152 Inch Platinum Diamond by the Yard Necklace 39.25 Ct

Est. US$44,811-US$58,254

US$100

Mynt AuctionsNew York, NY

Platinum Diamond Five Stone Ring: Metal : Platinum Designer : Not Signed Gemstone : Diamonds 1.02ctw. Measurements : Ring size 4.5, width 4.3mm wide. Marked: : 1.02, Pt900. Weight: : 4.7 grams

3 days Left

Platinum Diamond Five Stone Ring

Est. US$1,200-US$1,600

US$750

Farber AuctioneersLambertville, NJ

Gold, Platinum and Diamond Clip-Brooch: 18 kt., 51 round diamonds ap. 4.50 cts., ap. 20.5 dwts. Tests as 18 kt. Diamonds: G-H-VS-few SI 2 1/4 x 2 1/4 inches.

4 days Left

Gold, Platinum and Diamond Clip-Brooch

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

US$1,000

DOYLE Auctioneers & AppraisersNew York, NY

Art Deco Gruen Diamond, Platinum Precision Watch: Art Deco Gruen Diamond, Platinum Precision Watch Case: 24 x 14 mm, rectangle, platinum, hinged snapback, diamond-set bezel, domed mineral crystal Dial:

May 04, 2026

Art Deco Gruen Diamond, Platinum Precision Watch

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

US$2,400

Heritage AuctionsDallas, TX

Platinum and Diamond Ring: One old European-cut diamond ap. 1.25 cts., small round diamonds, ap. 4.3 dwts. Size 8 1/2. Center diamond: L-M-VS, faint fluorescence. Diamonds: G-H-VS. Width 1/4 inch.

4 days Left

Platinum and Diamond Ring

Est. US$1,500-US$2,000

US$750

DOYLE Auctioneers & AppraisersNew York, NY

Circa 1940s Platinum Openwork Bracelet with 35 Carat Diamonds: Circa 1940s Platinum Openwork Bracelet with 35 Carat Diamonds This exquisite bracelet, crafted in the 1940s, showcases a stunning openwork design made from platinum. It is adorned with 316 old cut dia

4 days Left

Circa 1940s Platinum Openwork Bracelet with 35 Carat Diamonds

Est. US$64,298-US$83,587

US$100

Mynt AuctionsNew York, NY

Art Deco Platinum 8.00 Ct. Diamond Brooch: Art Deco platinum diamond brooch, a dramatic, high-impact period piece measuring 2.5 inches in length with a bold, cascading silhouette and exceptional brilliance. Set with diamonds totaling approxima

5 days Left

Art Deco Platinum 8.00 Ct. Diamond Brooch

Est. US$8,400-US$12,600

US$4,200

Winbids AuctionsAventura, FL

Diamond, Platinum Bracelet Stones: Round brilli: Diamond, Platinum Bracelet Stones: Round brilliant-cut diamonds weighing a total of approximately 1.90 carats; full-cut diamonds weighing a total of approximately 9.00 c

May 04, 2026

Diamond, Platinum Bracelet Stones: Round brilli

Est. US$15,000-US$20,000

US$7,500

Heritage AuctionsDallas, TX

Platinum SSEF Certified Burma No-heat Pink Sapphire & Diamond Ring: Platinum SSEF certified Burma no-heat pink sapphire & diamond ring, centered by an approximately 2.50 ct SSEF certified Burmese pink sapphire with exceptional color and rarity, unenhanced by heat. Fla

5 days Left

Platinum SSEF Certified Burma No-heat Pink Sapphire & Diamond Ring

Est. US$18,000-US$27,000

US$9,000

Winbids AuctionsAventura, FL

HARRY WINSTON Platinum, Sapphire, and Diamond Eternity Band: HARRY WINSTON Platinum, Sapphire, and Diamond Eternity Band featuring channel-set groupings of square-cut sapphires weighing approx. 2.00 tcw. and princess-cut diamonds weighing approx. 2.00 tcw.; 4.8

18 hrs Left

HARRY WINSTON Platinum, Sapphire, and Diamond Eternity Band

Est. US$1,500-US$2,500

US$700

Grogan & CompanyBoston, MA

EDWARDIAN 1905 Cocktail Ring In Platinum With 14.16 Ctw Turquoise & Diamonds: Stunning Edwardian navette cocktail ring, America, circa 1900s, crafted in a refined transitional mix of .900 platinum and 18K white gold with a high-polish finish. Centered with an oval cabochon turq

5 days Left

EDWARDIAN 1905 Cocktail Ring In Platinum With 14.16 Ctw Turquoise & Diamonds

Est. US$5,800-US$8,700

US$2,800

Winbids AuctionsAventura, FL

6.42ct GIA Certified No Heat Sapphire & Diamond Ring Platinum Graff: 6.42ct GIA Certified No Heat Sapphire & Diamond Ring Platinum Graff This exquisite ring features a stunning 6.42 ct no-heat sapphire, complemented by sparkling diamonds, all set in luxurious platinum.

May 04, 2026

6.42ct GIA Certified No Heat Sapphire & Diamond Ring Platinum Graff

Est. US$56,355-US$73,261

US$100

Mynt AuctionsNew York, NY

(10pc) 14K GOLD AND PLATINUM BANDS: Including 7 14k yellow gold bands and 2 14k white gold bands, 18.4 g total weight; plus 1 platinum band set with melee diamonds, 2.3 g; mostly size 7-1/4, all marked or test as 14k / PLAT Provenance:

17 hrs Left

(10pc) 14K GOLD AND PLATINUM BANDS

Est. US$800-US$1,200

US$600

Butterscotch AuctionPound Ridge, NY

Platinum, Diamond and Sapphire Bow Bar Pin: 31 old European and transitional-cut diamonds ap. 1.90 cts., 12 square, rectangular and fancy-shaped sapphires, no. 22130, c. 1920, ap. 5.4 dwts. Diamonds: G-H-I-VS, several SI. Sapphires: medium to m

4 days Left

Platinum, Diamond and Sapphire Bow Bar Pin

Est. US$1,000-US$1,500

US$500

DOYLE Auctioneers & AppraisersNew York, NY

Platinum Corundum sapphire diamond ring GIA: Platinum natural Corundum sapphire with diamonds ring. Comes with GIA certificate. Total 7.27 carats sapphire and total 0.87 carats natural diamonds. Total appraisal report value $29,580. US ring size

5 days Left

Platinum Corundum sapphire diamond ring GIA

Est. US$3,300-US$4,300

US$500

West Coast Auction Gallery IRVINE, CA

VACHERON & CONSTANTIN Platinum, Diamond, and Sapphire Wristwatch: VACHERON & CONSTANTIN Platinum, Diamond, and Sapphire Wristwatch Art Deco; the octagonal cream-toned dial with Arabic numeral indicators; enclosing a manual wind movement; signed on dial and case back

18 hrs Left

VACHERON & CONSTANTIN Platinum, Diamond, and Sapphire Wristwatch

Est. US$800-US$1,200

US$600

Grogan & CompanyBoston, MA

Jerry Weintraub | Platinum, Sapphire, Diamond, and Emerald Ring: Centering upon an oval-cut sapphire, within a marquise-cut diamond and pear-shaped emerald surround, mounted in platinum, ring size 7.5, 9.8 grams. Unmarked, Kee tested for platinum. Oval-cut sapphire

May 05, 2026

Jerry Weintraub | Platinum, Sapphire, Diamond, and Emerald Ring

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

US$700

Julien's AuctionsGardena, CA

Star Sapphire, Diamond, Platinum Pendant-Necklac: Star Sapphire, Diamond, Platinum Pendant-Necklace Stones: Star sapphire cabochon; marquise-shaped diamonds weighing a total of approximately 2.15 carats; baguette-cu

May 04, 2026

Star Sapphire, Diamond, Platinum Pendant-Necklac

Est. US$8,000-US$10,000

US$4,000

Heritage AuctionsDallas, TX

Art Deco Platinum Aquamarine Diamond Jewelry Element Lot: Metal : Platinum Designer : Not Signed Gemstone : Diamonds approx. 4.00ctw, Aquamarine. Measurements : Large element is 44mm x 23mm, Small flower elements are 13mm x 8mm, rectangular - 15mm x 7m

3 days Left

Art Deco Platinum Aquamarine Diamond Jewelry Element Lot

Est. US$1,800-US$2,500

US$1,200

Farber AuctioneersLambertville, NJ

Platinum natural Corundum ruby diamond ring GIA: Platinum natural Corundum natural ruby diamond ring, comes with GIA certificate. US ring size 6.9. Total 4.22 carats natural ruby, and total 1.10 carats natural diamonds.

5 days Left

Platinum natural Corundum ruby diamond ring GIA

Est. US$3,900-US$4,900

US$500

West Coast Auction Gallery IRVINE, CA

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