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Diamonds by the Yard Platinum Necklace 7.35ct Round 17 Inch: Diamonds by the Yard Platinum Necklace 7.35ct Round 17 Inch This refined necklace features 53 round brilliant cut diamonds with a total weight of approximately 7.35 carats, elegantly set in platinum.

2 days Left

Diamonds by the Yard Platinum Necklace 7.35ct Round 17 Inch

Est. US$7,449-US$9,683

US$100

Mynt AuctionsNew York, NY

Platinum 10ct Opal Diamond Ring: Metal : Platinum Designer : Not Signed Gemstone : Opal approx. 10ct ( 21 x 11mm), Diamonds approx. 0.20ctw. Measurements : Ring size 6.25, top is 23 x 16mm. Marked: : Tested pl

3 days Left

Platinum 10ct Opal Diamond Ring

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

US$1,400

Farber AuctioneersLambertville, NJ

PLATINUM BRACELET SET WITH DIAMONDS AND SYNTHETIC SAPPHIRES: Total weight gr. 29,6 Length 19 cm 1930s

3 days Left

PLATINUM BRACELET SET WITH DIAMONDS AND SYNTHETIC SAPPHIRES

Est. €5,500-€6,500

€5,500

INTERNATIONAL ART SALEMilano, MILANO

Tiffany & Co Platinum 3 ct Diamond Spiral Earrings: Tiffany & Co. Platinum PT950 Diamond Spiral Earrings · 3.00 ctw · Signed · Original Box A refined and highly recognizable pair of authentic Tiffany & Co. diamond spiral earrings, masterfully crafte

May 17, 2026

Tiffany & Co Platinum 3 ct Diamond Spiral Earrings

Est. US$12,000-US$16,000

US$11

Hannosh'sMacomb, MI

PLATINUM BROOCH SET WITH DIAMONDS: Total weight gr. 13,9 Total diamonds weight approx. 6,50 ct Dimensions approx. 4,2 x 3,7 cm French hallmarks, Deposé SSM

3 days Left

PLATINUM BROOCH SET WITH DIAMONDS

Est. €3,000-€3,600

€3,000

INTERNATIONAL ART SALEMilano, MILANO

Art Deco Platinum 4.60 Ct. Diamond Pendant/Brooch: Art Deco platinum diamond pendant/brooch, a versatile, collector-grade jewel measuring 2.5 inches in length and designed with a foldable bale that converts the brooch into a pendant. Centered by an ap

5 days Left

Art Deco Platinum 4.60 Ct. Diamond Pendant/Brooch

Est. US$7,000-US$10,500

US$3,400

Winbids AuctionsAventura, FL

7.5 Inch Platinum Bracelet with 18 Sapphires and 144 Diamonds: 7.5 Inch Platinum Bracelet with 18 Sapphires and 144 Diamonds This platinum bracelet features 18 sapphires with an approximate total weight of 10.00 carats and 144 diamonds with an approximate total w

3 days Left

7.5 Inch Platinum Bracelet with 18 Sapphires and 144 Diamonds

Est. US$16,276-US$21,158

US$100

Mynt AuctionsNew York, NY

SILVER AND GEMSTONE PENDANT WITH PLATINUM CHAIN: With a faceted amethyst measuring approx. 10.9 x 15.2 mm and a pear-shaped faceted orange stone, possibly citrine, measuring approx. 16.6 x 10.8 mm, mounted with seed pearls and turquoise, set in silv

23 hrs Left

SILVER AND GEMSTONE PENDANT WITH PLATINUM CHAIN

Est. US$100-US$300

US$90

Butterscotch AuctionPound Ridge, NY

Platinum 1.36ct Sapphire Cabochon Diamond Ring: Metal : Platinum Designer : Not Signed Gemstone : Sapphire 1.36ct, Diamonds approx. 0.20ctw. Measurements : Ring size 8.5, top is 12 x 9.5mm. Marked: : 1.36. Weight

3 days Left

Platinum 1.36ct Sapphire Cabochon Diamond Ring

Est. US$2,200-US$3,000

US$1,500

Farber AuctioneersLambertville, NJ

TIFFANY&CO Kaleidoscope Key Necklace in PT950 Platinum with Diamond: TIFFANY&CO Kaleidoscope Key Necklace in PT950 Platinum with Diamond Introducing the stunning TIFFANY&CO Kaleidoscope Key Diamond Necklace, crafted from high-quality Pt950 Platinum. This exquisite piec

3 days Left

TIFFANY&CO Kaleidoscope Key Necklace in PT950 Platinum with Diamond

Est. US$9,087-US$11,813

US$100

Mynt AuctionsNew York, NY

Mid Century Platinum Diamond Engagement Ring Setting: Metal : Platinum Designer : Not Signed Gemstone : Diamonds approx. 0.28ctw (one missing). Measurements : Ring size 4.75 (shank is split), center will fit approx. 7.5mm stone. Marked:

3 days Left

Mid Century Platinum Diamond Engagement Ring Setting

Est. US$800-US$1,200

US$450

Farber AuctioneersLambertville, NJ

Platinum Art Deco Ring Featuring Star Sapphire and Diamond Accents: Platinum Art Deco Ring Featuring Star Sapphire and Diamond Accents This Art Deco platinum ring features an approximately 18.00 carat star sapphire, complemented by two baguette diamonds with a total w

May 05, 2026

Platinum Art Deco Ring Featuring Star Sapphire and Diamond Accents

Est. US$6,357-US$8,264

US$100

Mynt AuctionsNew York, NY

Platinum Diamond Shared Prong Ring: Platinum Diamond Shared Prong Ring, featuring five round brilliant cut diamonds, approx. 1.25 carats total weight, G-H color / VS - SI clarity, marked: "PLAT" with maker's mark. Measuring approx. US s

May 28, 2026

Platinum Diamond Shared Prong Ring

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

US$1,500

Auctions at ShowplaceAstoria, NY

Hamilton Art Deco Platinum Diamond Cocktail Watch 195 Diamonds: Hamilton Art Deco Platinum Diamond Cocktail Watch 195 Diamonds Experience the elegance of the Art Deco era with this exquisite Hamilton cocktail watch. Crafted from premium platinum, this timepiece is

May 03, 2026

Hamilton Art Deco Platinum Diamond Cocktail Watch 195 Diamonds

Est. US$6,630-US$8,619

US$100

Mynt AuctionsNew York, NY

Lot of (5) 1 Gram .9995 Platinum Bars: Lot of (5) 1 Gram .9995 Platinum Bars - This appealing bullion lot features five individual 1 gram platinum bars, each struck in .9995 fine platinum and offering both intrinsic value and collectible a

May 02, 2026

Lot of (5) 1 Gram .9995 Platinum Bars

Est. US$600-US$650

US$220

GWS Auctions Inc.Maitland, FL

18KT GOLD AND PLATINUM SNUFF BOX SET WITH SAPPHIRES AND ROSE-CUT DIAMONDS: Total weight gr. 105 Dimensions approx. 8 x 5,2 x 1,1 cm Accompanied by the case

3 days Left

18KT GOLD AND PLATINUM SNUFF BOX SET WITH SAPPHIRES AND ROSE-CUT DIAMONDS

Est. €7,500-€9,500

€7,500

INTERNATIONAL ART SALEMilano, MILANO

Antique Art Deco Platinum Diamond Engagement Ring: Authentic Art Deco Platinum Diamond Engagement Ring · 1.50 ctw · 1.20 ct Center · Circa 1930s A genuine Art Deco engagement ring dating to the 1930s, masterfully crafted in platinum with a 10% irid

May 17, 2026

Antique Art Deco Platinum Diamond Engagement Ring

Est. US$6,000-US$8,400

US$5

Hannosh'sMacomb, MI

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BOUCHERON SOLITAIRE DIAMOND RING PLATINUM

Est. US$4,950-US$7,260

US$25

NY Elizabeth Beverly Hills, CA

Platinum 25.10 Ct Diamond by the Yard Necklace 57 Inches: Platinum 25.10 Ct Diamond by the Yard Necklace 57 Inches This stunning Platinum Diamond by the Yard Necklace features an impressive total diamond weight of approximately 25.10 carats. It is meticulous

May 04, 2026

Platinum 25.10 Ct Diamond by the Yard Necklace 57 Inches

Est. US$32,032-US$41,641

US$100

Mynt AuctionsNew York, NY

Waslikoff And Sons Art Deco 1940 Platinum Bracelet With 42.84 Ctw In Diamonds And Aquamarines: Art Deco bracelet by M. Waslikoff & Sons, New York City, circa 1940s, impeccably crafted in platinum with iridium (.900/.999 plat, .100/.999 irid) and fitted with an invisible push lock and hinged saf

5 days Left

Waslikoff And Sons Art Deco 1940 Platinum Bracelet With 42.84 Ctw In Diamonds And Aquamarines

Est. US$19,000-US$28,500

US$9,500

Winbids AuctionsAventura, FL

Angela Cummings Platinum DIamond Hashtag Pendant Necklace: Metal : Platinum Designer : Angela Cummings Gemstone : Diamonds approx. 1.30ctw. Measurements : Necklace is 16" long, pendant is 25mm x 16mm. Marked: : Cummings, Plat, 1999. <

3 days Left

Angela Cummings Platinum DIamond Hashtag Pendant Necklace

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

US$650

Farber AuctioneersLambertville, NJ

Oversized Champagne Diamond Estate Ring in Platinum and 18K Gold by David Webb: Oversized Champagne Diamond Estate Ring in Platinum and 18K Gold by David Webb This stunning David Webb cocktail ring showcases a modern and oversized design, expertly crafted in 18K solid yellow gold

3 days Left

Oversized Champagne Diamond Estate Ring in Platinum and 18K Gold by David Webb

Est. US$18,447-US$23,981

US$100

Mynt AuctionsNew York, NY

Stunning 4.25 Ct Diamond Cartier Platinum Ring: Stunning 4.25 Ct Diamond Cartier Platinum Ring This exquisite Cartier ring features a stunning 1.25 Ct center diamond, complemented by two side champagne diamonds totaling 1.70 Ct. The mounting is ado

6 days Left

Stunning 4.25 Ct Diamond Cartier Platinum Ring

Est. US$13,559-US$17,626

US$6,400

BidhausNew York, NY

Vintage 18k Gold & Platinum Ruby Ring: Vintage 18k Gold & Platinum Ruby Ring 1970s–1980s, European Vintage 18k gold and platinum ring set with 16 marquise-cut rubies measuring approximately 5.0 × 2.5 mm each, arranged in a continuous ba

May 05, 2026

Vintage 18k Gold & Platinum Ruby Ring

Est. US$800-US$1,200

US$400

Akiba GalleriesDania Beach, FL

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