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Tanzanite, Diamond, Platinum Ring: Tanzanite, Diamond, Platinum Ring Centering a rectangular step-cut tanzanite weighing approximately 16.90 cts., accented by eighteen baguette-cut and one hundred-ten round brilliant-cut diamonds weigh

6 days Left

Tanzanite, Diamond, Platinum Ring

Est. $3,000-$5,000

$1,500

Fine Estate, Inc. San Rafael, CA

A PLATINUM, PINK SPINEL AND DIAMOND RING: A PLATINUM, PINK SPINEL AND DIAMOND RING Centering an oval-shaped pink spinel, weighing 2.24 carats, accented across by round brilliant-cut, square and half moon-shaped diamonds; with maker's marks; e

May 19, 2026

A PLATINUM, PINK SPINEL AND DIAMOND RING

Est. $9,000-$12,000

$9,000

BonhamsLos Angeles, CA

18K Gold Platinum Ruby Diamond Large Flower Brooch Pendant Vintage: 18K Gold Platinum Ruby Diamond Large Flower Brooch Pendant Vintage This striking pendant brooch features a stunning sunflower design crafted from solid 18K yellow gold and platinum. It is adorned with

4 hrs Left

18K Gold Platinum Ruby Diamond Large Flower Brooch Pendant Vintage

Est. $9,620-$12,506

$100

Mynt AuctionsNew York, NY

GIA Burmese Ruby VS2 Diamond Platinum Bracelet: Featured in this lot is this Burmese ruby VS2 diamond platinum bracelet with GIA and GGA paperwork. The bracelet is polished, stamped, and tested platinum construction that is marked as follows: Aaron

4 days Left

GIA Burmese Ruby VS2 Diamond Platinum Bracelet

Est. $40,000-$50,000

$5,500

North American Auction Co.Bozeman, MT

1.8CTW DIAMOND PLATINUM BANGLE BRACELET W/ TANZ: One polished, stamped, and tested platinum bangle bracelet marked Oscar Friedman. The bangle is mounted with: 1 genuine tanzanite center stones weighing approximately 20.90 carats, and 70 genuine roun

May 30, 2026

1.8CTW DIAMOND PLATINUM BANGLE BRACELET W/ TANZ

Est. $7,950-$10,000

$1,950

Florida Estate Sales Inc.Tallahassee, FL

Art Deco Platinum Diamond Pendant Watch Brooch: Art Deco Platinum Diamond Pendant Watch Brooch Early 20th Cent. Art deco platinum and diamond pendant watch brooch, designed as a stylized ribbon bow suspending a circular watch. The bow form top is a

May 21, 2026

Art Deco Platinum Diamond Pendant Watch Brooch

Est. $1,000-$1,500

$500

Akiba GalleriesDania Beach, FL

May 21, 2026

Tiffany & Co. Etoile Platinum & Diamond Band Ring

Est. $1,000-$2,000

$500

Akiba GalleriesDania Beach, FL

Platinum and Sapphire Bangle Bracelet: Square and rectangular-cut sapphires ap. 17.00 cts., ap. 13.7 dwts. Inner cir. 7 5/16 inches.

May 21, 2026

Platinum and Sapphire Bangle Bracelet

Est. $2,000-$3,000

$1,000

DOYLE Auctioneers & AppraisersNew York, NY

Art Deco Platinum Heart Pendant Brooch 10.00 Ct Diamonds G-H VVS-VS: Art Deco Platinum Heart Pendant Brooch 10.00 Ct Diamonds G-H VVS-VS This exquisite Art Deco pendant/brooch features a stunning heart design crafted from platinum. Adorned with a total of 68 diamonds,

4 hrs Left

Art Deco Platinum Heart Pendant Brooch 10.00 Ct Diamonds G-H VVS-VS

Est. $10,842-$14,094

$100

Mynt AuctionsNew York, NY

18K GOLD PLATINUM DIAMOND TIMELESS STATION CHAIN: 18K GOLD PLATINUM DIAMOND TIMELESS STATION CHAIN: Platinum & 18 karat yellow gold diamond necklace, 20.5" long, 15 round full cut diamonds at total diamond weight 1.00 Ct approximately. Rated H-I in c

6 days Left

18K GOLD PLATINUM DIAMOND TIMELESS STATION CHAIN

Est. $3,250-$3,500

$3,000

Burchard Galleries IncSt. Petersburg, FL

4.00ct Emerald, 1.60ctw Diamond and Platinum Ring: 4.00ct Emerald, 1.60ctw SI1-I1/G-H Diamond and Platinum Vintage Ring - A striking vintage statement piece, this elegant platinum ring showcases a captivating approximately 4.00 carat emerald-cut emera

May 30, 2026

4.00ct Emerald, 1.60ctw Diamond and Platinum Ring

Est. $10,000-$11,000

$1,200

GWS Auctions Inc.Maitland, FL

8 hrs Left

Tiffany & Co. Platinum and Diamond Wedding Band Ring

Est. $450-$600

$300

Hampton Estate AuctionNew York, NY

A platinum tanzanite and diamond ring,: A platinum tanzanite and diamond ring, the rectangular cushion shape tanzanite, estimated to weigh approximately 18.00ct, claw set to a diamond halo surround, with diamond set split shoulders leading

Jun 02, 2026

A platinum tanzanite and diamond ring,

Est. £8,000-£12,000

£4,800

Sworders Fine Art AuctioneersEssex, England

Antique 18K Gold Platinum Ruby Sapphire Diamond Ring: Antique 18K Gold Platinum Ruby Sapphire Diamond Ring This exquisite antique ring features a stunning combination of 18K yellow gold and platinum, showcasing two Burma no-heat rubies weighing approxima

1 day Left

Antique 18K Gold Platinum Ruby Sapphire Diamond Ring

Est. $6,773-$8,804

$100

Mynt AuctionsNew York, NY

ANTIQUE PLATINUM NATURAL STAR SAPPHIRE & DIAMOND RING: Ladies' antique platinum star sapphire and diamond ring set with one bluish-grey cabochon natural star sapphire measuring 16.22 x 13.95 x 13.42mm with an estimated weight of 33.00cts, and 35 near-colo

Jun 10, 2026

ANTIQUE PLATINUM NATURAL STAR SAPPHIRE & DIAMOND RING

Est. $8,000-$12,000

$4,000

Dan Morphy AuctionsDenver, PA

A Demantoid, Synthetic Sapphire, Diamond, Silver and Gold Pendant with Seed Pearl Platinum Chain: Including one silver, 14 karat yellow gold, sapphire, garnet and diamond pendant with platinum and seed pearl chain; centering one marquise sapphire weighing approximately 2.40 carats, surrounded by 3

2 days Left

A Demantoid, Synthetic Sapphire, Diamond, Silver and Gold Pendant with Seed Pearl Platinum Chain

Est. $2,000-$4,000

$1,000

Abell AuctionLos Angeles, CA

PLATINUM BEZEL-SET DIAMOND BRACELET W/REPORT: Ladies' platinum bezel-set diamond (10.22ctw) bracelet accompanied by an original AIGL appraisal report with an ERRV of $49,687.00 (See additional website images of report for specifications). Width m

Jun 10, 2026

PLATINUM BEZEL-SET DIAMOND BRACELET W/REPORT

Est. $8,000-$12,000

$4,000

Dan Morphy AuctionsDenver, PA

PLATINUM 4.0CT DIAMOND AND SAPPHIRE BROOCH: This brooch exudes Art Deco elegance. Set in Platinum, Diamonds with a total weight of 4.0 carats add a touch of luxury to the stunning symmetrical setting. A 0.45 carat Sapphire at the center serves

3 days Left

PLATINUM 4.0CT DIAMOND AND SAPPHIRE BROOCH

Est. $4,200-$16,800

$4,200

Robinhood AuctionsLas Vegas, NV

Diana Vincent Platinum and Diamond Necklace: 48 round diamonds ap. 2.90 cts., with maker's mark, ap. 39.5 dwts. Length 18 1/2 inches.

May 21, 2026

Diana Vincent Platinum and Diamond Necklace

Est. $3,000-$5,000

$1,500

DOYLE Auctioneers & AppraisersNew York, NY

David Webb 18K gold and platinum carved coral and diamond floral form brooch. Carved coral flowers,: David Webb 18K gold and platinum carved coral and diamond floral form brooch. Carved coral flowers, each set with single black pearl in center surrounded by halo of 7 round cut diamonds (each about 2.

May 31, 2026

David Webb 18K gold and platinum carved coral and diamond floral form brooch. Carved coral flowers,

Est. $8,000-$12,000

$4,000

Tremont AuctionsSudbury, MA

PLATINUM SAPPHIRE & DIAMOND NECKLACE W/GIA REPORT: Ladies' platinum sapphire (27.64ctw) and diamond (6.61ctw) necklace accompanied by an original GIA sapphire report and an AIGL appraisal report with an ERRV of $88,172.00 (See additional website image

Jun 10, 2026

PLATINUM SAPPHIRE & DIAMOND NECKLACE W/GIA REPORT

Est. $12,000-$18,000

$6,000

Dan Morphy AuctionsDenver, PA

Art Deco Platinum 18.20 Ct Diamond Brooch with 230 European Cuts: Art Deco Platinum 18.20 Ct Diamond Brooch with 230 European Cuts This exquisite Art Deco brooch is crafted in platinum and features an impressive total diamond weight of 18.20 Ct. It is adorned with 2

2 days Left

Art Deco Platinum 18.20 Ct Diamond Brooch with 230 European Cuts

Est. $17,641-$22,933

$100

Mynt AuctionsNew York, NY

Rhapsody Kunzite, Diamond, Platinum Ring: Rhapsody Kunzite, Diamond, Platinum Ring. Featuring one round-cut kunzite weighing approximately 3.60 cts., accented by full-cut diamonds weighing a total of approximately 0.60 cttw., set in a platinu

3 days Left

Rhapsody Kunzite, Diamond, Platinum Ring

Est. $600-$800

$300

Michaan's AuctionsAlameda, CA

Three Stone Fancy Intense Yellow Diamond Ring Platinum and 18K Gold GIA Certified: Three Stone Fancy Intense Yellow Diamond Ring Platinum and 18K Gold GIA Certified This exquisite three-stone engagement ring features a stunning 1.32 carat Emerald Cut diamond at its center, certified

2 days Left

Three Stone Fancy Intense Yellow Diamond Ring Platinum and 18K Gold GIA Certified

Est. $11,661-$15,159

$510

Mynt AuctionsNew York, NY

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