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PLATINUM OCTAGONAL DIAMOND STUD EARRINGS: PLATINUM OCTAGONAL DIAMOND STUD EARRINGS: Platinum octagonal diamond ear studs. 2 old European cut diamonds at 0.425 carats each or 0.85 carats total. Rated G-H in color and VS-1 to VS-2 in clarity. T

5 days Left

PLATINUM OCTAGONAL DIAMOND STUD EARRINGS

Est. $3,250-$4,250

$3,000

Burchard Galleries IncSt. Petersburg, FL

PLATINUM 4.20CT DIAMOND AND SAPPHIRE RING: Bright in tone, but arranged with intent. A 2.10-carat pink sapphire is set east-west at the center, followed by trillion-cut diamonds above and below. From the trillion diamonds, trapezoid-cut diamon

3 days Left

PLATINUM 4.20CT DIAMOND AND SAPPHIRE RING

Est. $11,000-$44,000

$11,000

Robinhood AuctionsLas Vegas, NV

ANGELA CUMMINGS FOR TIFFANY & CO.: AN 18K GOLD, PLATINUM AND DIAMOND BROOCH: ANGELA CUMMINGS FOR TIFFANY & CO.: AN 18K GOLD, PLATINUM AND DIAMOND BROOCH Designed as a feather, the quill and rachis accented with round brilliant and single-cut diamonds; signed T&Co.; signed Cumm

7 days Left

ANGELA CUMMINGS FOR TIFFANY & CO.: AN 18K GOLD, PLATINUM AND DIAMOND BROOCH

Est. $3,000-$5,000

$3,000

BonhamsLos Angeles, CA

Lot of 3 Vintage Platinum & Diamonds Ring Settings: Lot of 3 Vintage Platinum & Diamonds Ring Settings. Please Note- Due to Recent Fraudulent Activity, All Jewelry Items Purchased by New Customers Cannot Be Shipped Out Until 3 Weeks After The Auction D

May 20, 2026

Lot of 3 Vintage Platinum & Diamonds Ring Settings

Est. $600-$1,200

$300

World Auction Gallery LLCEast Meadow, NY

Platinum 9.59ct Oval Aquamarine Diamond Pendant Necklace Bead Chain: Platinum 9.59ct Oval Aquamarine Diamond Pendant Necklace Bead Chain This exquisite necklace features a stunning large pendant that showcases a natural genuine oval aquamarine with a brilliant cut, wei

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Platinum 9.59ct Oval Aquamarine Diamond Pendant Necklace Bead Chain

Est. $2,964-$3,853

$100

Mynt AuctionsNew York, NY

Exquisite Platinum Diamond Branch Brooch 29 Diamonds 2in Length D-E VVS-VS: Exquisite Platinum Diamond Branch Brooch 29 Diamonds 2in Length D-E VVS-VS This exquisite Platinum Diamond Branch Brooch features a stunning design that showcases a total of 29 diamonds. The brooch we

16 hrs Left

Exquisite Platinum Diamond Branch Brooch 29 Diamonds 2in Length D-E VVS-VS

Est. $12,883-$16,747

$100

Mynt AuctionsNew York, NY

2 CARAT DIAMOND, PLATINUM & RUBY ENGAGEMENT RING: Pear shaped (2) Carat diamond flanked by (2) pear shaped rubies in platinum (tested) setting. Size 5 1/4. Gross weight 6.92 grams. Note: Matches lot 401

May 31, 2026

2 CARAT DIAMOND, PLATINUM & RUBY ENGAGEMENT RING

Est. $2,000-$4,000

$1,000

John McInnis Auctioneers,LLCAmesbury, MA

PLATINUM AND 18K YELLOW GOLD 1.85CT DIAMOND AND NO-HEAT BURMESE RUBY RING: A true vintage jewel, this ring reflects a period when craftsmanship and practicality met in equal measure. The platinum setting rises above a yellow gold hinged shank, a thoughtful feature historical

3 days Left

PLATINUM AND 18K YELLOW GOLD 1.85CT DIAMOND AND NO-HEAT BURMESE RUBY RING

Est. $9,000-$36,000

$9,000

Robinhood AuctionsLas Vegas, NV

Hammerman Brothers Gold, Platinum and Diamond Pendant Clip-Brooch: 18 kt., 61 round diamonds ap. 1.65 cts., signed HB, pendant loop added later, ap. 15.4 dwts.

May 21, 2026

Hammerman Brothers Gold, Platinum and Diamond Pendant Clip-Brooch

Est. $2,500-$3,500

$1,200

DOYLE Auctioneers & AppraisersNew York, NY

PLATINUM ROUND BRILLIANT CUT DIAMOND ETERNITY RING: Ladies' platinum diamond eternity ring/band consisting of 16 round brilliant cut natural diamonds with a total weight of 4.82cts, graded G/H, VS2. Gross weight is 6.3 grams. Finger size 6-1/2. Width m

Jun 10, 2026

PLATINUM ROUND BRILLIANT CUT DIAMOND ETERNITY RING

Est. $6,000-$9,000

$3,000

Dan Morphy AuctionsDenver, PA

GIA 3.48ct Sapphire VS1 Diamond Platinum Ring: Featured in this lot is this 3.48ct sapphire VS1 diamond platinum ring with GIA and AIGL paperwork. The ring is polished, stamped, and tested platinum construction that is marked on the inside of the

4 days Left

GIA 3.48ct Sapphire VS1 Diamond Platinum Ring

Est. $20,000-$30,000

$3,750

North American Auction Co.Bozeman, MT

Leica M6 Platinum “150 Jahre Optik": Leica M6 Platinum “150 Jahre Optik 1849-1999” set Nr. 1857/1999, with M6 Platinum Nr. 2490008 and 50mm Elmar-M f2,8 in matching platinum finish. All packaging and literature are included, and

May 30, 2026

Leica M6 Platinum “150 Jahre Optik"

Est. $7,000-$9,000

$7,000

Tamarkin Rare Camera AuctionsChicago, IL

Edwardian Platinum and Diamond Bow Pendant with White Gold Chain Necklace: 14 kt., 6 old-mine cut diamonds ap. .55 ct., small old-mine cut diamonds ap. 1.40 cts., small rose-cut diamonds, c. 1910, converted from brooch, one small diamond missing, ap. 13.7 dwts. Length 15 1/2

May 21, 2026

Edwardian Platinum and Diamond Bow Pendant with White Gold Chain Necklace

Est. $1,500-$2,000

$750

DOYLE Auctioneers & AppraisersNew York, NY

Platinum GIA Certified 3.66ctw Colombian Emerald Diamond Ring: Platinum GIA Certified 3.66ctw Colombian Emerald Diamond Ring This exquisite ring features a stunning natural Colombian emerald with a bright green hue, expertly cut into an oval double cabochon shape

3 days Left

Platinum GIA Certified 3.66ctw Colombian Emerald Diamond Ring

Est. $3,913-$5,086

$100

Mynt AuctionsNew York, NY

David Webb Platinum 18K Gold Diamond Lightning Bolt Earrings: David Webb Platinum 18K Gold Diamond Lightning Bolt Earrings Elevate your accessory collection with these exquisite earrings from David Webb. Crafted in a stunning combination of platinum and 18K yell

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David Webb Platinum 18K Gold Diamond Lightning Bolt Earrings

Est. $12,038-$15,649

$100

Mynt AuctionsNew York, NY

Tiffany & Co. 0.81 ct Round Brilliant Diamond Engagement Ring VVS2 Platinum: Tiffany & Co. 0.81 ct Round Brilliant Diamond Engagement Ring VVS2 Platinum This exquisite Tiffany & Co. engagement ring features a stunning 0.81 ct round brilliant diamond, celebrated for its excelle

13 hrs Left

Tiffany & Co. 0.81 ct Round Brilliant Diamond Engagement Ring VVS2 Platinum

Est. $7,020-$9,126

$100

BidhausNew York, NY

French 18K Gold Platinum Diamond Flower Brooch En Tremblant 4.20 Ct: French 18K Gold Platinum Diamond Flower Brooch En Tremblant 4.20 Ct This exquisite French En Tremblant flower brooch is crafted from luxurious 18K gold and platinum, showcasing a stunning arrangement

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French 18K Gold Platinum Diamond Flower Brooch En Tremblant 4.20 Ct

Est. $8,593-$11,170

$100

Mynt AuctionsNew York, NY

Platinum White Diamond & White Opal Ring: 900 (90%) Platinum Cocktail Ring Featuring 1 Center Set Prominent White Opal Stone Approx. 2.60ct Surrounded By 24 Round Cut Lab Grown Diamonds Approx. 0.014ct Each. Surrounding The Center Stones Are

2 days Left

Platinum White Diamond & White Opal Ring

Est. $10-$10,000

$2

Berner's Antique Auction GallerySpringfield, OH

GIA 4.28ct Tanzanite VS2 Diamond Platinum Ring: Featured in this lot is this 4.28ct tanzanite VS2 diamond platinum ring with GIA and GGA paperwork. The ring is polished, stamped, and tested platinum construction that is marked as follows: Oscar Fri

4 days Left

GIA 4.28ct Tanzanite VS2 Diamond Platinum Ring

Est. $20,000-$30,000

$3,750

North American Auction Co.Bozeman, MT

Stunning 2.50ct Diamond Platinum Floral Bow Brooch: Stunning 2.50ct Diamond Platinum Floral Bow Brooch This exquisite brooch is artfully crafted from platinum and showcases a captivating multi-loop open floral design adorned with a ribbon bow. It featu

2 days Left

Stunning 2.50ct Diamond Platinum Floral Bow Brooch

Est. $6,695-$8,703

$100

Mynt AuctionsNew York, NY

Sapphire, Diamond, Platinum, Gold Earrings Ston: Sapphire, Diamond, Platinum, Gold Earrings Stones: Oval-shaped sapphires weighing a total of approximately 2.50 carats; mine-cut diamonds weighing a total of approx

May 21, 2026

Sapphire, Diamond, Platinum, Gold Earrings Ston

Est. $800-$1,200

$500

Heritage AuctionsDallas, TX

Tiffany & Co. 18k Gold Platinum Diamond X Pendant Chain: Tiffany & Co. 18k Gold Platinum Diamond X Pendant Chain This elegant pendant and chain from Tiffany & Co. features a stunning X design crafted from 18k yellow gold, accented with a round cut diamond s

22 hrs Left

Tiffany & Co. 18k Gold Platinum Diamond X Pendant Chain

Est. $5,759-$7,486

$100

Mynt AuctionsNew York, NY

PLATINUM GREENISH-BLUE TOURMALINE & DIAMOND NECKLACE W/REPORT: Ladies' platinum greenish-blue indicolite tourmaline (9.29ct) and diamond (0.54ctw) pendant and chain accompanied by an original AIGL appraisal report with an ERRV of $17,434.00 (See additional websit

Jun 10, 2026

PLATINUM GREENISH-BLUE TOURMALINE & DIAMOND NECKLACE W/REPORT

Est. $3,000-$5,000

$1,500

Dan Morphy AuctionsDenver, PA

7.66 TANZANITE PLATINUM LADIES RING W/ DIAMONDS: Platinum (PLAT) natural tanzanite zoisite and diamond ring. Two (2) rectangular cushion cut natural tanzanite zoisite gemstones are mounted in the center of the ring. Round brilliant cut diamonds acce

May 30, 2026

7.66 TANZANITE PLATINUM LADIES RING W/ DIAMONDS

Est. $4,000-$10,000

$950

Florida Estate Sales Inc.Tallahassee, FL

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