Vintage Tiffany & Co. Platinum Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Marked Tiffany & Co. / 950 PT to the interior of the band. Simply classic design from Tiffany & Co!
Platinum
Tiffany & Co. Channel Set Semi Eternity Diamond Wedding Band Ring Platinum
By Tiffany & Co.
Located in Scottsdale, AZ
Ring size: 5 Metal: Platinum Weight: 2.8 grams Natural Diamond: .17 ctw Diamond cut: Round Brilliant Diamond color: F-G Diamond clarity: VVS1-VVS2 Ring outer diameter: 18.67 mm Band...
Diamond, Platinum
Tiffany & Co. Channel Set Semi Eternity Diamond Band Ring in Platinum, Size 3.75
By Tiffany & Co.
Located in Scottsdale, AZ
Ring size: 3.75 Metal: Platinum Weight: 2.8 grams Natural Diamond: .17 ctw Diamond cut: Round Brilliant Diamond color: G-H Diamond clarity: VS1-VS2 Ring outer diameter: 18.16 mm Ban...
Diamond, Platinum
Tiffany & Co. Picasso Diamond Platinum Marguerite Flower Stud Earrings
By Tiffany & Co.
Located in Simpsonville, SC
Condition - Good, some light surface scratches due to gentle use Dimensions: 0.38" Diameter Weight: 2.4 g Hallmarks: T&Co. PT 950, Paloma Picasso All our measurements are approxim...
Diamond, Platinum
Jockey Horse Racer Diamonds Platinum Enamel Unisex Brooch Boxed, Circa 1935
Located in Herzelia, Tel Aviv
Well, worth a fine jewelry collection. Stamped: PT 950 (Platinum) Weight: 0.30 oz (8.55 gr) Length: 3.5 cm (1.3 inches)
Diamond, Platinum, Enamel
Cartier 1895 Solitaire Brilliant-Cut Diamond Engagement Ring Platinum 1.12Carats
By Cartier
Located in Honolulu, HI
The ring will come with the original Cartier inner and outer box as well as the Cartier purchase receipt and printed GIA report. The ring is stamped "Pt 950" "55" "RPH081" "1.12 ct D...
Diamond, Platinum
$1,344Sale Price|20% Off
Tiffany & Co. 0.31 Carat H VVS1 Diamond Engagement Ring
By Tiffany & Co.
Located in Sewickley, PA
The band is forged in premium platinum, marked “Tiffany & Co. PT 950,” ensuring both durability and luxurious luster.
Diamond, Platinum
Tiffany & Co Platinum Sapphire Diamond Tie Clip Signed Boxed, 1970
By Tiffany & Co.
Located in Herzelia, Tel Aviv
The item is stamped with PT 950 Platinum hallmark and signed Tiffany & Co.
Diamond, Sapphire, Platinum
Tiffany & Co. Classic Milgrain Wedding Band Ring in Platinum
By Tiffany & Co.
Located in Honolulu, HI
The band is hallmarked "© Tiffany & Co" and stamped "PT 950" on the inside. This is a pre-owned Tiffany band in excellent condition.
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
IGI Certified Irina Ferry 7.29 CT Violet Spinel Diamond Platinum Ring
Located in Westport, CT
On either side are set fourteen natural round brilliant cut diamonds weighing approximately 0.28 CT in total, approximately near colorless and SI1–SI2 clarity. Stamped “Irina Ferry ...
Diamond, Spinel, Platinum
$45,600Sale Price|20% Off
Tiffany & Co. 2.03 Carat True Radiant Brilliant Diamond Engagement Ring
By Tiffany & Co.
Located in Chicago, IL
The inner band is stamped "©TIFFANY & CO. PT 950" and "7159** D2.03ct"**. Included with the ring are the original GIA Diamond Certificate and Tiffany & Co. ring box.
Diamond, White Diamond, Platinum
Vintage Van Cleef & Arpels NY Natural Diamond Platinum Solitaire Band Ring 49
By Van Cleef & Arpels
Located in Birmingham, GB
The ring is signed VCA PT 950 with serial numbers. Band is 3.8mm thick.
Diamond, White 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
Tiffany & Co Elsa Peretti 2.85 Carat Sapphire Platinum Bean Cufflinks
By Elsa Peretti for Tiffany & Co.
Located in Stamford, CT
Truly unique. 166 round blue sapphires, approx. 2.85cts Platinum Stamped: PT 950 Hallmark: TIffany + Co Elsa Peretti 28.4 grams Top to bottom: 18.5mm or .73 Inches Width: 20mm or ...
Sapphire, Platinum
Cartier Pave Diamond Platinum Heart Pendant Necklace
By Cartier
Located in Beverly Hills, CA
The necklace is stamped PT 950, Cartier, and with a serial number, confirming platinum construction and Cartier manufacture.
Diamond, Platinum
15.00 Carat Geometric Kunzite Diamond Platinum Art Deco Pendant Necklace
Located in Stamford, CT
A joyful stone, kunzite opens and connects the heart with the mind, encouraging communion between the two. 1 freeform geometric faceted pink with needles kunzite, approx. 15.00cts ...
Diamond, Kunzite, 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
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
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 Pendant Cross 16-inch Necklace
By Tiffany & Co.
Located in Philadelphia, PA
Marks: Marked both to the reverse of the cross for Tiffany & Co / PT 950 and to the chain. Gemstone Measurements: 11 diamonds: ca. 2.3 mm diameter Measurements: Height: ca. 18....
Diamond, Platinum
$102,400Sale Price|20% Off
Tiffany & Co. 3.26 Carat True Cut Diamond Platinum Solitaire Engagement Ring
By Tiffany & Co.
Located in Chicago, IL
It is stamped “©TIFFANY & CO. PT 950” and “6694**** D3.26ct”. The ring is accompanied by its original Tiffany & Co.
Diamond, White Diamond, Platinum
Tiffany & Co. Vannerie Platinum Diamond Eternity Band
By Tiffany & Co.
Located in Venice, CA
It is marked with the Tiffany & Co. plaque, as well as PT 950 and the copyright. The diamonds are G-H in color and VSII in clarity.
Diamond, Platinum
Peter Suchy 1.36 Oval Sapphire Diamond Three-Stone Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Designed and crafted in the Peter Suchy Workshop. 1 Oval blue heated sapphire 7.10 x 5.02 x3.4 approximate 1.00 carats 2 pear cut diamonds H-I VS-SI approximate .36 carats Size 7 a...
Diamond, Sapphire, Blue Sapphire, Platinum
Tiffany & Co. 1.75 Carat Diamond Platinum Rose Gold Lock Pendant Necklace
By Tiffany & Co.
Located in Stamford, CT
Tiffany + Co. hallmark and metal stamping. 271 round brilliant cut diamonds, approx. 1.75cts Platinum 18k rose gold Stamped: PT 950 750 Hallmark: Tiffany + Co. 11.8 grams Top to ...
Diamond, Gold, 18k Gold, Rose Gold, Platinum
Diamond and Platinum Double Halo Cluster Engagement Ring
Located in London, GB
Weighing 7.34g and currently measuring UK finger size 'R', but could be altered by a few sizes. Stamped PT 950. Tobi Gem Setting has specialised in antique, designer, pre-loved, new...
Diamond, White Diamond, Platinum
Peter Suchy .58 Carat Oval Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Created in the Peter Suchy Workshop, antique inspired, this platinum domed pendant has a .49ct oval bezel set center diamond, accented with a halo of 12 round Pavé set diamonds. 16 i...
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
Shreve, Crump & Low GIA Certified 5.13 Carat J VS2 Emerald Cut Diamond Plat Ring
By Shreve, Crump & Low
Located in Boston, MA
Setting is a ring size 6.5, stamped with our maker hallmark "SC&L" "PT 950" Shreve, Crump & Low is one of America's oldest and most prestigious jewelry and fine gift establishments ...
Diamond, Platinum
Art Deco Style Platinum Mozambique Ruby and Diamond Navette Ring
Located in Braintree, GB
Dimensions Ring size: UK N / US 6¾ / EU 54 Weight: 4.27 g Specifications - Metal: Platinum, PT 950 Certificate: AIG American International GemLab no.
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
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 Sapphire and Diamond Scalloped Cluster Ring
Located in Braintree, GB
Dimensions Ring size: UK L½ / US 6 / EU 52 Weight: 4.59 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26434Q6376 Certificate date: 6 February 2026 ...
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 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 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 Sapphire and Diamond Domed Bombe Ring
Located in Braintree, GB
Dimensions Ring size: UK N / US 6¾ / EU 54 Weight: 6.66 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26026Q3668 Certificate date: 30 January 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
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 Burmese Ruby and Diamond Navette Ring
Located in Braintree, GB
Dimensions Ring size: UK O / US 7¼ / EU 55 Weight: 6.24 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26285Q3323 Certificate date: 4 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
Art Deco Style Platinum Sapphire and Diamond Hexagonal Star Ring
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 4.48 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26004Q6651 Certificate date: 30 January 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 Sapphire and Diamond Pear Cluster Ring, 0.88 ct Sapphire
Located in Braintree, GB
Dimensions Ring size: UK M / US 6¼ / EU 52.5 Weight: 5.97 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26646Q9363 Certificate date: 12 February 20...
Platinum
Tiffany & Co Wedding Set: Princess Cut Diamond Engagement Ring + Diamond Band
By Tiffany & Co.
Located in MELBOURNE, AU
This delightful set comprises: AN ENGAGEMENT RING by Tiffany & Co, performed in platinum 950, it features a desirable princess cut diamond of 0.35ct, of I colour, VVS1 clarity ...
Diamond, Platinum
Peter Suchy .64 Carat Pear Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Designed and crafted in the Peter Suchy Workshop. 1 pear shaped diamond, approx. total weight .50cts, H, VS2 14 round diamonds, approx. total weight .14cts, F, VS 950 Platinum Teste...
Diamond, Platinum
5.05 Carat Round Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
AGL certified simple heat only no other enhancements. 1 round blue Sapphire, approx. total weight 5.05cts, AGL certificate CS 62358 122 round full cut diamonds, approx. total weigh...
Diamond, Blue Sapphire, Sapphire, Platinum
Cartier 0.30ct Diamond Engagement Ring Platinum Sz 5 Estate COA GIA Signed
By Cartier
Located in Torrance, CA
The ring is hallmarked "Pt 950" for platinum, the European ring size "49", "Cartier" along with the serial number.
Diamond, White Diamond, Platinum
Kurt Wayne 3.50 Carat Diamond Platinum Swirl Hoop Earrings
By Kurt Wayne
Located in Stamford, CT
The swirling design adds a touch of whimsy to the classic hoop style, making them a versatile accessory that can effortlessly transition from daytime chic to evening glamour. 112 I...
Diamond, Platinum
Tiffany & Co. Atlas 1.00 Carat Diamond Gold Platinum Necklace
By Tiffany & Co.
Located in Stamford, CT
The metal work along with the sparkle of the diamonds creates a stunning visual appeal. 20 round full cut F-G VS diamonds approximate 1.00 carats Total Length: 16 inches 18k yellow ...
Diamond, 18k Gold, Yellow Gold, Platinum, Gold
Tiffany & Co. GIA Certified Engagement Ring in Platinum with 0.45cts Diamond
By Tiffany & Co.
Located in Miami, FL
Hallmarks: Stamped with the maker's mark, the platinum assay mark, the serial numbers and signed, "©TIFFANY & CO. 27930018 0.45 CT PT .950". Collateral: It is accompanied by the...
Diamond, White Diamond, Platinum
.42 Carat Round Brilliant Cut Diamond Platinum Eternity Band Ring
Located in Stamford, CT
Not easily sizable. 14 round brilliant cut diamonds, G-H SI approx. .42cts Size 6 and not sizable Platinum Stamped: PT 950 7.4 Grams Width at top: 3.3mm Height at top: 3.2mm Width...
Diamond, Platinum
Tiffany & Co. Three Stones Earrings Studs In Solid Platinum With 6 Round Diamond
By Tiffany & Co.
Located in Miami, FL
Hallmarks: Stamped with the maker's mark, the mark for the assay of the platinum and signed, "T&CO PT .950 PAT.NO.6557220". Collateral: They are accompanied by the designer's presen...
Diamond, White Diamond, Platinum
Tiffany & Co. Schlumberger Diamond X Four Row Rope Band Ring 18K Gold & Platinum
By Jean Schlumberger for Tiffany & Co.
Located in Scottsdale, AZ
Natural Diamond: .54 ctw Diamond cut: Round brilliant Diamond color: G-H Diamond clarity: VS1-VS2 Ring outer diameter: 18.25 mm Band Width: 8.61 mm Stamped: Cartier TIFFANY & CO....
Diamond, 18k Gold, Yellow Gold, Platinum
Tiffany & Co. Tiffany 'Forever' Polished Platinum Unisex Wedding Band Ring 8.75
By Tiffany & Co.
Located in Scottsdale, AZ
Ring size: 8.75 Metal: Platinum Weight: 9.1 grams Band Width: 4.5 mm Outer diameter: 22.40 mm Stamped: Tiffany & Co. PT 950 Estate Condition: Very good, professionally cleaned a...
Platinum
Tiffany & Co. Tiffany 'Forever' Unisex Polished Platinum Wedding Band Ring
By Tiffany & Co.
Located in Scottsdale, AZ
Ring size: 9.5 Metal: Platinum Weight: 8.7 grams Band Width: 4.5 mm Outer diameter: 22.75 mm Stamped: Tiffany & Co. PT 950 Estate Condition: Excellent, professionally cleaned an...
Platinum
Tiffany & Co. Jazz Pagoda Diamond Chandelier Drop Pendant Necklace in Platinum
By Tiffany & Co.
Located in Scottsdale, AZ
Metal: Platinum Natural Diamonds: 1.25 carats Diamond cut: Round Brilliant Diamond color: F-G Diamond clarity: VS1-VS2 Drop length: 1.75" Drop width: 11 mm Chain length: 17" Chain wi...
Diamond, Platinum
Art Deco Style Platinum Sapphire and Diamond Pierced Navette Ring
Located in Braintree, GB
Dimensions Ring size: UK N½ / US 7 / EU 54.5 Weight: 6.08 g Specifications - Metal: Platinum, PT 950 Certificate: Geneve Gemslab no. GGLG26577Q6308 Certificate date: 11 February 20...
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 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
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.