.33 Carat Round Diamond Woven Platinum Wedding Band Ring
Located in Stamford, CT
The woven motif symbolizes unity and everlasting connection, making this ring a meaningful and stylish choice for a wedding band or anniversary ring. 30 round full cut Diamonds, app...
Diamond, Platinum
Tiffany & Co. 1.50 Carat Diamond Platinum Garland Bracelet
By Tiffany & Co.
Located in Stamford, CT
Crafted with the finest quality in mind that Tiffany & Co. is known for. 61 round brilliant cut diamonds, F VS approx. 1.05cts Platinum Stamped: PT 950 Hallmark: Tiffany + Co....
Diamond, Platinum
Tiffany & Co. Platinum Firecracker Diamond Fire Burst Pendant Necklace 17.75"
By Tiffany & Co.
Located in Boca Raton, FL
Collection: Firecracker Style: Diamond Fire Burst Pendant Necklace Material: Platinum (Pt950) Gemstones: Natural diamonds, approximately 0.15ctw Pendant Measurements: Approximately 1...
Diamond, Platinum
$9,995Sale Price|22% Off
Tiffany & Co. Platinum Princess Cut Diamond Engagement Ring 0.82ct 4.5g
By Tiffany & Co.
Located in SYDNEY, NSW
Metal: Platinum PT950 Carat: 0.82ct Colour: F Clarity: VVS1 Cut: Princess Cut Weight: 4.5 grams Engravings/Markings: Signed 27596819 .82ct Tiffany & Co.
Diamond, Platinum
Platinum & Diamond Belle Epoque Style Drop Earrings
Located in Brisbane City, QLD
We could imagine these being worn by a bride on her wedding day, or being a really gorgeous wedding anniversary gift for a fine jewel lover. Marked - 'Pt 950' for platinum to earri...
Diamond, Platinum
Tiffany and Co Authentic Ring. Tiffany Together Double Milgrain Platinum Band
By Tiffany & Co.
Located in Port Charlotte, FL
Rare Tiffany and Co. Platinum Pt950 Tiffany Together Collection Double Milgrain Platinum Band Comfort Fit.
Platinum
Tiffany & Co. Platinum Diamond Emerald Green Amethyst Horseshoe Pendant
By Tiffany & Co.
Located in Boca Raton, FL
Pt950 This authentic Tiffany & Co. horseshoe pendant features a refined platinum design accented with sparkling diamonds, emerald, and green amethyst.
Amethyst, Diamond, Emerald, Platinum
Sophisticated 0.21ct Natural Diamond Heavy Band Ring in Platinum
Located in רמת גן, IL
TECHNICAL SPECIFICATIONS Jewelry type: Ring Metal: Platinum Hallmarks: Pt950 (Observed stamped on the inner shank) Ring size: EU 52 / HK 13 Resizable: Yes Shank profile: Plain band w...
Diamond, Platinum
Vintage Tiffany & Co. Together Double Milgrain Wedding Band, Platinum, 3mm
By Tiffany & Co.
Located in New York, NY
A classic wedding band by Tiffany & Co. from the Together collection, dating to circa 1990, executed in platinum PT950 with a polished center bordered by two fine milgrain edges ...
Platinum
Rhapsody Platinum 2.20ct Blue Zircon and Diamond Halo Ring
Located in New York, NY
Weight: 8.4 Grams Stone: Blue Zircon 2.20ct Stone: Diamond 0.11tcw Measurements: 11 x 10.85 x 7.5mm Size: 6.75 Hallmark: RHAPSODY, 950, PT Metal: Platinum Item #: BR-1830-031326-03
Diamond, Blue Topaz, Platinum
Art Deco Style Platinum Square Cut Sapphire and Diamond Quatrefoil Ring
Located in Braintree, GB
Dimensions Ring size: UK L / US 5¾ / EU 51 Weight: 4.16 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26008Q6972 Certificate date: 30 January 2026 ...
Platinum
Tiffany & Co. Platinum Diamond Kaleidoscope Key Pendant Necklace 16"
By Tiffany & Co.
Located in New York, NY
Tiffany & Co. Platinum Diamond Kaleidoscope Key Pendant Necklace 16" Platinum Pt950 Pendant dimension 58 mm x 22 mm With Bail 63 mm -Marquise diamonds, carat total weight .25 -Square...
Diamond, Platinum
Tiffany & Co. 3 Diamond Platinum Flat Band Ring Size 6
By Tiffany & Co.
Located in Boca Raton, FL
PT950 This authentic Tiffany & Co. ring features a sleek flat platinum band accented with three flush-set diamonds.
Diamond, Platinum
Tiffany & Co. Platinum 4mm Double Milgrain Wedding Band Ring Size 7
By Tiffany & Co.
Located in Boca Raton, FL
PT950 This authentic Tiffany & Co. wedding band features a classic polished platinum profile framed by delicate double milgrain edges.
Platinum
Art Deco Style Platinum 1.00 ct Sapphire and Diamond Lozenge Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 3.14 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26292Q2429 Certificate date: 4 February 202...
Platinum
.60 Carat Diamond Platinum Violin Pendant Brooch
Located in Stamford, CT
Three-dimensional violin brooch pendant in solid platinum with pave and channel set diamonds. 24 straight baguette diamonds H-I SI, approx. .30ct 64 round diamonds H-I SI, approx. ....
Diamond, Platinum
Tiffany & Co. Fleur Diamond Keshi Pearl Platinum Dangle Earrings
By Tiffany & Co.
Located in Boca Raton, FL
Fleur Diamond Keshi Pearl Dangle Earrings are exquisitely crafted in luxurious platinum (Pt950) and showcase luminous natural Keshi pearls gracefully suspended beneath delicate Fleur...
Diamond, Pearl, Platinum
Tiffany & Co. Peretti Diamond Pointed Top Platinum Ring Size 6
By Elsa Peretti for Tiffany & Co.
Located in Boca Raton, FL
Designer: Elsa Peretti Style: Diamond Pointed Top Ring Material: Platinum (Pt950) Gemstones: 1 natural diamond, approximately 0.03 carat Top Measurements: Approximately 6.6 mm across...
Diamond, Platinum
Tiffany & Co. Paper Flowers Diamond Platinum Ring Size 7
By Tiffany & Co.
Located in Boca Raton, FL
Paper Flowers Diamond Ring is expertly crafted in luxurious platinum (Pt950) and showcases the collection's signature floral motif inspired by the delicate beauty of paper petals in ...
Diamond, Platinum
Vintage Tiffany & Co. Together Double Milgrain Wedding Band, Platinum, 3mm
By Tiffany & Co.
Located in New York, NY
Style: Together Double Milgrain Era: Vintage Metal: Platinum (PT950) Hallmarks: © Tiffany & Co., PT950 Size: 5.25, sizable at any Tiffany & Co. location worldwide Width: 3mm ...
Platinum
Art Deco Style Platinum Sapphire and Diamond Navette Ring, Rayed Setting
Located in Braintree, GB
Dimensions Ring size: UK O / US 7¼ / EU 55 Weight: 4.34 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26603Q7225 Certificate date: 11 February 2026...
Platinum
8.19 Carat Pear Morganite Diamond Platinum Dangle Earrings
Located in Stamford, CT
The pairing of pear-shaped morganite gemstones and dazzling diamonds set in platinum creates a timeless allure that is both mesmerizing and refined. 2 pear soft pink Morganite, app...
Diamond, Morganite, Platinum
Platinum, Sapphire, and Diamond Three Stone Ring
By Hamilton Jewelers
Located in Princeton, NJ
A significant platinum (PT950), sapphire, and diamond three stone ring centering an 11.93 carat blue cushion cut sapphire, this center stone flanked on either side by bullet shaped d...
Diamond, Sapphire, Platinum
10.98 Carat Round Diamond X Link Platinum Necklace
Located in Stamford, CT
Indulge in the allure of this masterpiece that effortlessly blends classic design with contemporary allure, a must-have for those with a penchant for fine jewelry. 196 round diamo...
Diamond, Platinum
Art Deco Style Platinum 2.56 ct Sapphire and Diamond Shield Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 5.92 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26404Q3891 Certificate date: 6 February 202...
Platinum
Art Deco Style Platinum 1.84 ct Sapphire and Diamond Lozenge Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 4.28 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26411Q3548 Certificate date: 6 February 202...
Platinum
Art Deco Style Platinum Mozambique Ruby and Diamond Star Target Ring
Located in Braintree, GB
Dimensions Ring size: UK L½ / US 6 / EU 52 Weight: 4.27 g Specifications - Metal: Platinum, PT 950 Certificate: AIG American International GemLab no.
Platinum
Art Deco Style Platinum Burmese Ruby and Diamond Octagonal Target Ring
Located in Braintree, GB
Dimensions Ring size: UK O / US 7¼ / EU 55 Weight: 5.72 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26542Q6756 Certificate date: 11 February 2026...
Platinum
Art Deco Style Platinum Sapphire and Diamond Navette Ring, Banded Setting
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 6.05 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26308Q7794 Certificate date: 4 February 202...
Platinum
Tiffany & Co. Fireworks Diamond & Gray Pearl Platinum Pendant Necklace 19"
By Tiffany & Co.
Located in Boca Raton, FL
Collection: Fireworks Style: Diamond & Pearl Pendant Necklace Material: Platinum (Pt950) Pearl: Gray pearl Diamonds: Natural diamonds, approximately 0.15ctw Pendant Measurements:...
Diamond, Pearl, Platinum
Art Deco Style Platinum Ceylon Sapphire and Diamond Flowerhead Cluster Ring
Located in Braintree, GB
Dimensions Ring size: UK N / US 6¾ / EU 54 Weight: 3.92 g Specifications - Metal: Platinum, PT 950 Certificate: AIG American International GemLab no.
Platinum
Art Deco Style Platinum 1.45 ct Sapphire and Diamond Navette Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 4.41 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26637Q1031 Certificate date: 12 February 20...
Platinum
Art Deco Style Platinum Three Stone Sapphire and Diamond Navette Ring
Located in Braintree, GB
Dimensions Ring size: UK N / US 6¾ / EU 54 Weight: 3.92 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26631Q3169 Certificate date: 11 February 2026...
Platinum
$72,000Sale Price|20% Off
Tiffany & Co. Embrace Platinum Round Brilliant Ring
By Tiffany & Co.
Located in Chicago, IL
Embrace engagement ring, crafted in platinum (PT950) and showcasing the house’s exceptional standards of brilliance and craftsmanship.
Diamond, White Diamond, Platinum
Vintage 0.97 Carat Diamond and Platinum Solitaire Ring
Located in Jesmond, Newcastle Upon Tyne
The ring is hallmarked to the interior of the shank with the fineness mark for platinum (PT950) and the maker's mark. This vintage diamond ring is supplied with an IDGL diamond grad...
Diamond, Platinum
Tiffany & Co. Jazz Legacy Diamond Necklace in Platinum
By Tiffany & Co.
Located in Chicago, IL
Collection: Jazz Metal: Platinum (PT950) Chain Length: 16 Inches Signed: TIFFANY & CO.
Diamond, Platinum
Tiffany Certified 2 Carat Round Diamond Platinum Solitaire Pendant Necklace
By Tiffany & Co.
Located in Chicago, IL
The diamond exhibits an impressive I color grade, indicating its near-colorless beauty, and a VS1 clarity grade, meaning it has very slight inclusions that are difficult to see even ...
Diamond, Platinum
Art Deco Style Platinum Diamond and Calibre Sapphire Star Cluster Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 3.88 g Specifications - Metal: Platinum, PT 950 Certificate: AIG American International GemLab no.
Platinum
$10,950Sale Price|37% Off
GIA Platinum Round Brilliant Cut Diamond Halo Ring 1.48ct 5.8g
By GIA
Located in SYDNEY, NSW
Total diamond weight 1.48ct. Metal: Platinum Carat: 1.48ct (1.24ct GIA) Colour: E/G Clarity: VS/VS1-VS2 Cut: Round Brilliant Cut Weight: 5.8 grams Engravings/Markings: Signed PT950...
Diamond, Platinum
Tiffany & Co Soleste Cushion 0.22 CT Diamond Engagement Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co Double Row Soleste Diamond Engagement Ring Style: Halo with Bead Set Diamond Band Ref. number: 2050956 Metal: Platinum Pt950 Size / Measurements: 4.5 sizable / 2 mm...
Diamond, Platinum
Vintage Double Row Diamond Platinum Wedding Band Ring
Located in Montreal, QC
Hand crafted Platinum mounting. PT950 RMFJ D0.24" stamped in shank.
Diamond, Platinum
Art Deco Platinum Cabochon Emerald Diamond Ring, 1930s
Located in Monaco, MC
The ring is crafted in platinum (Pt 950), weighing 10.1 grams. The cabochon emerald displays a rich, saturated green with the soft luminous glow characteristic of unfaceted stones — ...
Diamond, Emerald, Platinum
Vintage Diamond Solitaire Engagement Ring with a Tiffany & Co. Platinum Setting
By Tiffany & Co.
Located in Philadelphia, PA
A fine estate platinum and diamond solitaire engagement ring. In .950 platinum.
Diamond, Platinum
Cartier LOVE Platinum 5.5mm Band Ring Size US 6 EU 52
By Cartier
Located in Boca Raton, FL
Brand: Cartier Collection: LOVE Style: Classic Band Ring Material: Platinum (Pt950) Band Width: Approximately 5.5 mm Ring Size: US 6 / EU 52 Weight: 9.3 grams Hallmarks: Stamped Cart...
Platinum
Cartier Platinum 2mm Domed Wedding Band Ring Size 8 EU 57
By Cartier
Located in Boca Raton, FL
Brand: Cartier Style: Domed Wedding Band Ring Material: Platinum (PT950) Band Width: Approximately 2 mm Ring Size: US 8 / EU 57 Weight: 3.8 grams Hallmarks: Stamped Cartier PT950 57 ...
Platinum
Tiffany & Co. Lucida Platinum Wedding Band Ring 3 mm
By Tiffany & Co.
Located in San Diego, CA
Style: Lucida Wedding Band SKU Number: 14762205 Metal: Platinum PT950 Size: 8 - sizable Width: 3 MM Hallmark: ©TIFFANY&CO.PT950 Includes: Tiffany & Co.
Platinum
Tiffany & Co. Fireworks Diamond Gray Pearl Platinum Pendant Necklace 18"
By Tiffany & Co.
Located in Boca Raton, FL
Collection: Fireworks Style: Diamond Pearl Pendant Necklace Material: Platinum (Pt950) Diamonds: Natural diamonds, approximately 0.15ctw Pearl: Natural pale gray pearl, approximately...
Diamond, Pearl, Platinum
1.65 Carat Diamond Platinum Art Deco Pendant Necklace
Located in Stamford, CT
Art Deco 1930's diamond pendant necklace. 22 transitioanl and baguette cut diamonds on a 16 inch chain. 12 transitional cut diamonds, H-I VS-SI approx. .35cts 7 straight cut baguet...
Diamond, Platinum
Tiffany & Co. Platinum .60ct Diamond Heart Lariat Pendant Twisted Chain Necklace
By Tiffany & Co.
Located in Montclair, NJ
Material: Solid .900+ Platinum (tested) - Stamped PT950 Weight: 11.27 Grams Chain Type: 16" - Twisted Wire link - Lobster Claw Clasp Lariat Dimension: 35.6x16.2mm (1.4x0.64") Heart P...
Diamond, Platinum
Tiffany & Co. Platinum Eternity Band Ring Round Diamonds 0.51tcw
By Tiffany & Co.
Located in San Diego, CA
Eternity Band Ring in Platinum Style: Channel-Set Eternity Ref. number: 145/12/10601762 Metal: Platinum PT950 Size: 6 Measurements: 2.5 MM TCW: 0.51 tcw Main Diamond: 39 Roun...
Diamond, Platinum
Tiffany & Co. Victoria Diamond Tennis Bracelet 3.08 tcw in Platinum
By Tiffany & Co.
Located in San Diego, CA
Victoria Diamonds Tennis Bracelet Style: Tennis Bracelet Ref. number: 60088600 Metal: Platinum PT950 Size: Small Length: 7' Inches Main Stone: 51 Round Brilliant Diamonds 2...
Diamond, Platinum
Tiffany & Co. Platinum Blue Sapphire & Diamond Engagement Ring 1.15ct 4.65g
By Tiffany & Co.
Located in SYDNEY, NSW
The ring weighs 4.65 grams and is a size N. Signed Tiffany & Co. PT950. Metal: 950 Platinum Carat: 1.15ct (0.70ct Sapphire & 0.45ct Diamonds) Colour: Royal Blue Clarity: N/A Cut: R...
Diamond, Blue Sapphire, Platinum
Tiffany & Co. ETOILE Diamond Band Ring Platinum Size 5.75
By Tiffany & Co.
Located in San Diego, CA
ETOILE Diamond Band Ring Style: Band Ref. number: 60004786 Metal: Platinum PT950 Size: 5.75 Measurements: 4.3 mm TCW: 0.22 tcw Main Diamond: 10 Round Brilliant Diamonds Hallm...
Diamond, Platinum
Tiffany & Co. Etoile 3 Diamond Heart Platinum Slide Pendant Necklace 16"
By Tiffany & Co.
Located in Boca Raton, FL
Collection: Etoile Style: 3 Diamond Heart Slide Necklace Material: Platinum (Pt950) Gemstones: 3 natural brilliant-cut diamonds Design: Heart-shaped slide pendant Pendant Measurement...
Diamond, Platinum
Tiffany & Co. Elsa Peretti Diamond Starfish Platinum Charm Bracelet 7"
By Elsa Peretti for Tiffany & Co.
Located in Boca Raton, FL
Designer: Elsa Peretti Style: Diamond Starfish Charm Oval Link Bracelet Material: Platinum (Pt950) Diamond: Approximately 0.23 carat total weight Design: Oval link bracelet featu...
Diamond, Platinum
Peter Suchy .10 Carat Diamond Platinum Star Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Petite star design pendant with 5 brilliant cut diamonds in platinum. 16 inch chain. Created in the Peter Suchy workshop. 5 round brilliant cut diamonds, F-G VS approx. .10cts Plati...
Diamond, Platinum
Tiffany & Co. 1.35 Carat Diamond Paper Flowers Platinum Drop Necklace
By Tiffany & Co.
Located in Stamford, CT
Perfect for special occasions or adding a refined touch to an evening ensemble, it is a distinctive and luxurious addition to any fine jewelry collection. 82 round brilliant diamond...
Diamond, Platinum
Tiffany & Co. Soleste Full Eternity Diamond Platinum Wedding Band Ring
By Tiffany & Co.
Located in University Place, WA
Details Platinum (PT950) Full circle of round brilliant diamonds (full eternity) Soleste beaded setting design Signed © Tiffany & Co.
Diamond, Platinum
2.02 Carat Green Tourmaline Diamond Platinum Dangle Earrings
Located in Stamford, CT
Hinged chevron sections with bright full cut diamonds with two kite shaped green Tourmaline dangles in platinum. 2 kite shaped bright green Tourmaline, approx. total weight 2.02cts...
Diamond, Tourmaline, 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
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.