Toi&Moi 2 Carats diamond ring in platinum
Located in Uccle, BE
Hallmarks: "W" for Wolfers 1812 - "PT950" for Platinum Weight: 8,1 grams Length: 10.8mm Width: 20.3mm Ring size: 52.
Diamond, Platinum
Graff Multi-Shape Diamond Platinum Cocktail Ring Sz 6
By Graff
Located in Feasterville, PA
Brand: Graff Hallmarks: Graff, Serial, PT950 Material: Platinum Metal Purity: 950 Color: White Main Stone: Diamond Size: 6 Accessories: Graff Papers Condition: Pre-owned
Diamond, Platinum
Art Deco Style Platinum 1.11 ct Sapphire and Diamond Bow Plaque Ring
Located in Braintree, GB
Dimensions Ring size: UK N / US 6¾ / EU 54 Weight: 4.58 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26569Q6188 Certificate date: 11 February 2026...
Platinum
Tiffany & Co. Elsa Peretti Diamond Curved Platinum Band Ring Size 6
By Elsa Peretti for Tiffany & Co.
Located in Boca Raton, FL
Designer: Elsa Peretti Style: Diamond Curved Band Ring Material: Platinum (Pt950) Gemstones: 9 natural round brilliant diamonds, approximately 0.06ctw Design: Sculptural curved V-sha...
Diamond, Platinum
Classic 0.50ct Round Brilliant Natural Diamond Solitaire Ring in Platinum
Located in רמת גן, IL
This classic platinum solitaire ring represents the epitome of timeless elegance and bridal romance.
Diamond, Platinum
Tiffany & Co Platinum Round Diamond Stud Earrings 2.25 tcw GIA
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co Classic Stud Round Brilliant Diamond Earrings Style: Prong Set Metal: Platinum Pt950 TCW: 2.25 tcw Diamond 1: Round Brilliant 1.12 G - VVS2 GIA F01290006 Diamond 2:...
Diamond, Platinum
1.78 Carat Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
The ring is hallmarked to the interior of the shank with the platinum mark (PT950). This impressive diamond solitaire with diamond shoulders is supplied with an independent diamond ...
Diamond, Platinum
Art Deco Style Platinum Sapphire and Diamond Oval Plaque Ring, Champagne Accents
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 4.79 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26430Q9271 Certificate date: 6 February 202...
Platinum
Art Deco Style Platinum Sapphire and Diamond Cushion Plaque Ring, 0.66 ct
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 4.15 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26587Q7535 Certificate date: 11 February 20...
Platinum
Art Deco Style Platinum 1.09 ct Sapphire and Diamond Bombe Navette Ring
Located in Braintree, GB
Dimensions Ring size: UK N / US 6¾ / EU 54 Weight: 4.33 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26633Q2818 Certificate date: 12 February 2026...
Platinum
Art Deco Style Platinum 1.00 ct Diamond Navette Ring, Calibre Sapphire Border
Located in Braintree, GB
Dimensions Ring size: UK N½ / US 7 / EU 54.5 Weight: 6.16 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26137Q8798 Certificate date: 2 February 202...
Platinum
Tiffany & Co. Elsa Peretti Diamond Mini Bean Platinum Ring Size 4
By Elsa Peretti for Tiffany & Co.
Located in Boca Raton, FL
Designer: Elsa Peretti Style: Mini Bean Diamond Ring Material: Platinum (PT950) Gemstones: Natural diamonds, approximately 0.15ctw Design: Sculptural Mini Bean motif Front Measuremen...
Diamond, Platinum
Tiffany & Co. Harmony Platinum Engagement Ring with Diamonds
By Tiffany & Co.
Located in Aventura, FL
Collection: Harmony Period: Contemporary Metal: Platinum (PT950) Stones: Natural Diamonds Ring Size: 5 (sizable) Stamped: PT950, TIFFANY & CO.
Diamond, White Diamond, Platinum
CARTIER Platinum Diamond Stud Earrings Rounds 2.05 Carats GIA Certificates
By Cartier
Located in San Diego, CA
Cartier 1895 Round Brilliant Diamonds Stud Earrings Style: 4 Prong Stud Earrings Ref. number: N8515231 Metal: Platinum PT950 TCW: 2.05 tcw Main Diamond: 1. RBD 1.02 G VS1 GIA...
Diamond, Platinum
Tiffany & Co. .99 Carat Diamond Platinum Swing Drop Pendant Necklace
By Tiffany & Co.
Located in Stamford, CT
Tiffany & Co diamond pendant. 17 Marquise and round diamond dangles set in a platinum swing drop setting. 16 inch chain. length does not include pendant. 17 Marquise and round diamo...
Diamond, Platinum
Art Deco Style Platinum 1.13 ct Sapphire and Diamond Oval Plaque Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 4.83 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26324Q3238 Certificate date: 4 February 202...
Platinum
Art Deco Style Platinum 0.81 ct Mozambique Ruby and Diamond Cluster Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 3.29 g Specifications - Metal: Platinum, PT 950 Certificate: AIG American International GemLab no.
Platinum
Art Deco Style Platinum 1.51 ct Burmese Ruby and Diamond Plaque Ring
Located in Braintree, GB
Dimensions Ring size: UK O / US 7¼ / EU 55 Weight: 6.22 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26555Q2971 Certificate date: 11 February 2026...
Platinum
3.75 Carat Pear Shaped Diamond Platinum Dangle Drop Earrings
Located in Stamford, CT
Each with a row of 6 round cut diamonds totaling .48cts with two EGL certified pear shaped diamond at each end totaling 1.90cts. 2 round diamonds, approx. total weight 1.37cts, H –...
Diamond, Platinum
Platinum, Diamond, Sapphire, and Enamel Chandelier Earrings
By Hamilton Jewelers
Located in Princeton, NJ
An important pair of Oprah Winfrey worn platinum (PT950), diamond, fancy-color sapphire, and enamel chandelier fan earrings.
Diamond, Sapphire, Platinum, Enamel
Kurt Wayne 3.50 Carat Diamond Platinum Swirl Hoop Earrings
By Kurt Wayne
Located in Stamford, CT
These exquisite indie out, slightly twisted feature 112 ideal cut diamonds mounted in platinum with platinum earring backs. The swirling design adds a touch of whimsy to the classic ...
Diamond, Platinum
Art Deco Style Platinum 0.90 ct Mozambique Ruby and Diamond Quatrefoil Ring
Located in Braintree, GB
Dimensions Ring size: UK N / US 6¾ / EU 54 Weight: 4.68 g Specifications - Metal: Platinum, PT 950 Certificate: AIG American International GemLab no.
Platinum
Tiffany & Co Platinum Mens Together Double Milgrain Wedding Band 6 mm Size 11.25
By Tiffany & Co.
Located in New York, NY
Style: Together Double Milgrain Metal: Platinum (PT950) Hallmarks: © Tiffany & Co., PT950 Size: 11.25, sizable at any Tiffany & Co. location worldwide Width: 6mm Weight: 15.0 g Retai...
Platinum
Tiffany & Co. Elsa Peretti Platinum Rock Crystal Teardrop Pendant Necklace 16"
By Elsa Peretti for Tiffany & Co.
Located in Boca Raton, FL
Designer: Elsa Peretti Style: Rock Crystal Teardrop Pendant Necklace Material: Platinum (Pt950) Gemstones: Natural rock crystal Pendant Measurements: Approximately 24.6 mm long inclu...
Rock Crystal, Platinum
Tiffany & Co. Elsa Peretti Diamonds By The Yard Platinum Chain Bracelet 8.5"
By Elsa Peretti for Tiffany & Co.
Located in Boca Raton, FL
PT950 This authentic Tiffany & Co. Elsa Peretti Diamonds By The Yard bracelet features bezel-set diamonds spaced along a delicate platinum chain.
Diamond, Platinum
Tiffany & Co .98 Carat Diamond Platinum Bubble Key Pendant
By Tiffany & Co.
Located in Stamford, CT
The original box box is Included. 114 round brilliant cut diamonds, F VS approx. .98cts Platinum Stamped: PT 950 Italy Hallmark: Tiffany + Co 10.1 grams Top to bottom: 50.6mm or ...
Diamond, Platinum
Van Cleef & Arpels Toujours Wedding Band Ring in Platinum
By Van Cleef & Arpels
Located in San Diego, CA
VAN CLEEF & ARPELS Style: TOUJOURS Wedding Band Ring Serial: BSO1423 Metal: Platinum PT950 Width: 4 MM Size: 9.75 - sizable Hallmark: VCA BS01423 Includes: Elegant Ring Box R...
Platinum
$1,518Sale Price|20% Off
Classic Van Cleef & Arpels Platinum Plain Polished 5mm Wedding Band Ring Sz 56
By Van Cleef & Arpels
Located in Montclair, NJ
Material: Solid .950 Platinum (tested) - Stamped PT950 Weight: 9.5 Grams Ring Size: Size 56 - 7.5 (Fitted on a finger.
Platinum
Tiffany & Co. Pavé Diamond Heart Dangle Ring in Platinum
By Tiffany & Co.
Located in University Place, WA
This piece reflects Tiffany & Co.’s ability to combine elegance with subtle, expressive detail. Details: Platinum (PT950) Pavé-set round brilliant diamonds, approximately 0.17 t...
Diamond, Platinum
Tiffany & Co. Platinum Etoile Vintage Diamond Band Ring 4.3mm , Size 6
By Tiffany & Co.
Located in New York, NY
Collection: Etoile, Vintage Metal: Platinum PT950 Hallmarks: T & Co., PT950 Size: 6.
Diamond, Platinum
Tiffany & Co. Peretti Clear Rock Crystal Open Heart Platinum Pendant Necklace
By Tiffany & Co.
Located in Boca Raton, FL
Designer: Elsa Peretti Collection: Open Heart Style: Rock Crystal Pendant Necklace Material: Platinum (Pt950) Gemstones: Natural clear rock crystal Design: Open Heart pendant accente...
Rock Crystal, Platinum
Sapphire and Diamond Trilogy Engagement Ring in Platinum
Located in Jesmond, Newcastle Upon Tyne
The trilogy ring is hallmarked to the interior of the shank with the maker's mark (XM), the platinum fineness mark (PT950) and the Birmingham Assay office hallmark (anchor).
Diamond, Sapphire, Platinum
Rom Germany 18k Yellow Gold & Platinum Byzantine Link Bracelet
Located in Boca Raton, FL
· Brand: ROM Germany · Material: 18k yellow gold and platinum · Hallmark: Pt950 18k Germany ROM · Measurement: approximately 7.5" long x 0.35" wide x 0.35" high · Weight: 61.5 gram...
18k Gold, Yellow Gold, Platinum
Tiffany & Co. Jazz Round 0.90 Carat Diamond and Platinum Circle Pendant Necklace
By Tiffany & Co.
Located in San Diego, CA
Style: Jazz Circle Metal: Platinum PT950 Length: Chain is 16" Total Carat Weight: .90 TCW Diamond Shape: Round Brilliant Diamonds Diamond Color & Clarity: G / VS Hallmark: ...
Diamond, Platinum
Tiffany & Co. Platinum .19 ct Diamond Solitaire Classic Engagement Ring
By Tiffany & Co.
Located in New York, NY
Collection: Tiffany Classic Setting Metal: Platinum (Pt950) Hallmarks: © Tiffany & Co., PT950, .19ct, Serial Number Finger Size: 4.75 — free resizing available, or at any Tiffany...
Diamond, Platinum
Vintage 1.43ct Diamond Platinum Stud Earrings, Birmingham Circa 1940
Located in Jesmond, Newcastle Upon Tyne
The butterfly fastenings are struck with the platinum fineness marks (PT950). These platinum and diamond stud earrings are supplied with two independent diamond grading certificates.
Diamond, Platinum
Art Deco Style Platinum Sapphire and Diamond Pear Cluster Ring, 0.88 ct Sapphire
Located in Braintree, GB
Between the petals sit round diamonds, some white and some a warm champagne, and the diamond set shoulders taper into a plain platinum shank. Dimensions Ring size: UK M / US 6¼ / EU...
Platinum
Antique Art Deco 1.75 Carat Diamond and Platinum Drop Pendant
Located in Jesmond, Newcastle Upon Tyne
The later chain of this stunning Art Deco pendant is hallmarked with the maker's mark, the town mark for Sheffield (rose) and the fineness marks for platinum (950 and PT950). This A...
Diamond, Platinum
1.14 Carat Diamond and Platinum Trilogy Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
The ring is hallmarked to the interior of the contemporary shank with the platinum fineness marks (PT950 and 950), the maker's mark 'XM' and the Birmingham Assay Office hallmark (anc...
Diamond, Platinum
Peter Suchy 1.00 Carat Diamond Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Odd shaped oval and cushion old mine cut diamond set into a classic dangle pendant in handmade platinum bezel from the Peter Suchy workshop. 1 old mine cut diamond I-J VS, approx. ...
Diamond, Platinum
Tiffany & Co. Platinum 0.78ct G-VS1 Round Diamond Solitaire Engagement Ring
By Tiffany & Co.
Located in New York, NY
Collection: Tiffany Classic Setting Metal: Platinum (PT950) Hallmarks: © Tiffany & Co., PT950 Size: 4.75.
Diamond, Platinum
Tiffany & Co. Jazz Pear & Round Diamond Platinum Drop Pendant Necklace
By Tiffany & Co.
Located in University Place, WA
Suspended from a fine 16-inch platinum cable chain with a spring ring clasp. Details: Platinum (PT950) Three bezel-set diamonds: pear, round brilliant, and pear Graduated vertical d...
Diamond, Platinum
1.30 Carat Diamond Platinum Retro Style Pendant Necklace
Located in Stamford, CT
Platinum cable link chain. 1 round brilliant cut diamond F-G SI, approx. .35cts 2 pear shape diamonds G SI-I, approx. .40cts 6 step cut baguette diamonds VS-SI-G, approx. .25ct 12 s...
Diamond, Platinum
Platinum, Diamond, Sapphire, and Moonstone Longchain Station Necklace
By Hamilton Jewelers
Located in Princeton, NJ
A platinum (PT950), diamond, sapphire, and moonstone longchain necklace of 36 inches, the sapphires and moonstones of various organic and rounded shapes all bezel set, interspersed b...
Diamond, Moonstone, Sapphire, Platinum
Cartier 1895 Platinum 2.5mm Wedding Band Ring w/Cert Size 7.5 EU 56
By Cartier
Located in Boca Raton, FL
Brand: Cartier Collection: 1895 Style: Wedding Band Ring Material: Platinum (Pt950) Band Width: Approximately 2.5 mm Ring Size: US 7.5 / EU 56 Weight: 3 grams Hallmarks: Stamped Cart...
Platinum
Art Deco Style Platinum Burmese Ruby and Diamond Plaque Ring, 1.09 ct Ruby
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 5.77 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26232Q4360 Certificate date: 4 February 202...
Platinum
Vintage Tiffany & Co. Diamond Band Platinum Size 5.5 (51)
By Tiffany & Co.
Located in Beverly Hills, CA
The inside of the band is engraved with the Tiffany & Co. signature and platinum purity mark (PT950). The narrow band makes it easy to pair with other rings or wear on its own.
Diamond, Platinum
11.62 Carat Banded Agate Diamond Platinum Dangle Earrings
Located in Stamford, CT
Vintage 1940's banded agate simple dangle earrings with 6 bead set diamonds in platinum tops. 2 pear shaped black brown cabochon banded agate cylinders, approx. 11.62cts 6 single c...
Agate, Diamond, Platinum
Peter Suchy .53 Carat Round Diamond Platinum Halo Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Designed and crafted in the Peter Suchy Workshop. 1 round diamond, approx. total weight .39cts, G, VS2 12 round diamonds, approx. total weight .14cts, F, VS 950 Platinum Top to bott...
Diamond, Platinum
Vintage 3.15Ct Diamond and Platinum Full Eternity Ring Circa 1960
Located in Jesmond, Newcastle Upon Tyne
The ring is hallmarked to the interior shank with the platinum mark (Pt950). This impressive full eternity is supplied with an IDGL diamond grading report card.
Diamond, Platinum
Tiffany & Co., 0.44 Carat Round Brilliant Cut Diamond Pendant Necklace, Platinum
By Tiffany & Co.
Located in Chicago, IL
Pendant Stamp: (serial number) Chain Stamp: TIFFANY & CO. Pt950 Metal: Platinum Measurements: 16 inches long Gross weight: 2.65 grams Accompanied by a Tiffany & Co. box, Diamond Cer...
Diamond, Platinum
Tiffany & Co. Platinum and Diamond Wedding Band Ring 2.5 MM
By Tiffany & Co.
Located in San Diego, CA
Style: Half Circle Diamond Wedding Band Sku Number: 16183296 Size: 6.75 - sizable Metal: Platinum PT950 Total Carat Weight: 0.24 Cts. Diamond Shape: Round Brilliant Diamond Col...
Diamond, Platinum
Peter Suchy 1.88 Carat Diamond Platinum Three-Stone Engagement Ring
By Peter Suchy
Located in Stamford, CT
Desgined and crafted in the Peter Suchy Workshop. 1 emerald step cut I VS diamond, Approximate 1.53 carat GIA certified #5181771185 2 bullet step cut H VS diamonds, Approximate 0....
Diamond, Platinum
Tiffany & Co. 0.25ct Diamond Platinum Solitaire Ring Size 6 Cert & Box
By Tiffany & Co.
Located in Boca Raton, FL
Style: Diamond Solitaire Engagement Ring Material: Platinum Metal Purity: PT950 Hallmarks: Tiffany & Co.
Diamond, Platinum
Tiffany & Co Hexagon 1.2 Carat Diamond Platinum Eternity Band Ring
By Tiffany & Co.
Located in Miami, FL
Collection: Hexagon Metal: Platinum (PT950) Size: 5 (contact for sizing) Band Width: 8mm Weight: 6.70 grams Signed: Tiffany and Co.
Diamond, Platinum
1.24 Carat Diamond and Platinum Three-Stone Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
The ring is hallmarked to the interior of the shank with the platinum fineness marks (PT950 and 950), the maker's mark 'XM' and the Birmingham Assay Office hallmark (anchor).
Diamond, Platinum
Tiffany & Co. Cobblestone Rose-Cut Diamond Platinum Eternity Band Ring
By Tiffany & Co.
Located in University Place, WA
A signature design from Tiffany's celebrated Cobblestone collection, equally striking worn solo or stacked alongside other bands. Details: Platinum (PT950) Rose-cut and round brilli...
Diamond, Platinum
Tiffany & Co. Lucida Forever Platinum Wedding Band Ring 4.5 MM
By Tiffany & Co.
Located in San Diego, CA
Style: Lucida FOREVER Wedding Band SKU Number: 14762949 Metal: Platinum PT950 Size: 8 - sizable Width: 4.5 MM Hallmark: ©1999 TIFFANY&CO.PT950 Includes: Tiffany & Co.
Platinum
Tiffany & Co. Victoria Mixed Cluster Drop Earrings in Platinum, 4.25 ct tw
By Tiffany & Co.
Located in Feasterville, PA
Hallmarks: Tiffany & Co, PT950 Material: Platinum Metal Purity: 950 Color: White Main Stone: Diamond Weight: 10 grams Accessories: Our Gift Box Condition: Excellent
Diamond, Platinum
1.41 Carat Princess Cut Diamond and Platinum Stud Earrings
Located in Jesmond, Newcastle Upon Tyne
The secure push fit fastenings are each hallmarked with the platinum fineness mark (PT950),'ALPA' and the fastening manufacturers mark 'MECAN'.
Diamond, Platinum
Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.
From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!
There are several factors that set diamonds apart from other stones, and these points are important to our gem education.
Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.
In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).
When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings.
Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.