GIA Certified Henri Daussi 2.35 CT Flawless Diamond Sapphire Platinum Ring
Located in Westport, CT
refined and elegant accent. Mounted in platinum, stamped “PT950”. The center diamond is magnificently cut
Diamond, Sapphire, Platinum
Tiffany & Co. LEGACY 2.02 tc D VS1 Cushion Diamond Halo Engagement Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Metal: Platinum PT950 Size: 6 Total Diamond Weight: 2.02 tcw Main Diamond: Cushion Modified Brilliant
Diamond, Platinum
GIA Certified 2.61 Carat Tiffany Novo Diamond Engagement Ring in Platinum
By Tiffany & Co.
Located in Chicago, IL
brilliance while maintaining a graceful and sophisticated profile. Crafted in platinum (PT950), the ring
Diamond, Platinum
Tiffany & Co. Platinum .24 ct D VVS2 Diamond Solitaire Engagement Ring
By Tiffany & Co.
Located in New York, NY
Classic Metal: Platinum (Pt950) Finger Size: 4 (resizable) Weight: 3 grams Hallmarks: © TIFFANY & CO
Diamond, Platinum
Featherstone 6.64 Carat Rectangular Aqua Diamond Platinum Cocktail Ring
Located in Stamford, CT
SI approx. 1.00cts Size 7 and sizable Platinum Stamped: PT950 Hallmark: Featherstone 12.8 grams
Aquamarine, Diamond, Platinum
Tiffany & Co Platinum Diamond Engagement Ring Round 0.60 ct I VVS1
By Tiffany & Co.
Located in San Diego, CA
Accents Ref. number: 171/17/18942526 Metal: Platinum PT950 Size: 6.5 sizable TCW: 0.83 cts Main
Diamond, Platinum
Hearts On Fire Platinum 0.67ctw Fiery Diamond Classic Solitaire Engagement Ring
By Hearts On Fire
Located in Montclair, NJ
.) Material: Solid .950 Platinum (tested & Stamped PT950) Weight: 4.88 Grams Ring Size: 6.5 (fitted on finger
Diamond, Platinum
Peter Suchy GIA Certified 2.05 Carat Diamond Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Platinum Stamped: PT950 3.7 grams Top to bottom: 11.4mm Width: 8mm Depth or thickness: 5.5mm Total length
Diamond, Platinum
Tiffany & Co. Round Diamond Engagement Ring 1.23 Carat GVS2 Platinum
By Tiffany & Co.
Located in San Diego, CA
: 30600398 / N09290099 Metal: Platinum PT950 Size: 6 - sizable Total Carat Weight: 1.23 cts Diamond Shape
Diamond, Platinum
Tiffany & Co. 4 Ct. Platinum Diamond Fireworks South Sea Pearl Brooch
By Tiffany & Co.
Located in Chicago, IL
composition. The brooch is primarily crafted in platinum Pt950, with the pin bar executed in 18k white gold
Diamond, White Diamond, South Sea Pearl, Platinum
Peter Suchy EGL Certified 2.29 Carats Diamond Platinum Stud Earrings
By Peter Suchy
Located in Stamford, CT
SI3 approx. 1.15cts EGL Certificate # 400145986D Platinum Stamped: PT950 2.0 grams Top to bottom
Diamond, Platinum
Tiffany & Co Soleste Cushion 1.03 cts G VVS2 Diamond Engagement Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
. number: 68800919 Metal: Platinum Pt950 Size: 5 - sizable TCW: 1.36 carats Main Diamond: 1.03 Cushion
Diamond, Platinum
Tiffany & Co Soleste Cushion 1.03 cts E VVS1 Diamond Engagement Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Ref. number: 28776608 M10040196 Metal: Platinum Pt950 Size: 5.75 sizable Measurements: 2 mm Main
Diamond, Platinum
Peter Suchy GIA Certified 2.62 Carat Sapphire Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
sizable 950 Platinum 7.8 grams Tested: Platinum Stamped: PT 950 Width at top: 8.3mm Height at top
Diamond, Sapphire, Platinum
Tiffany & Co Platinum Diamond Engagement Ring Round 3.14 ct I VVS1 Solitaire
By Tiffany & Co.
Located in San Diego, CA
Ref. number: 162/11/66962121 Metal: Platinum PT950 Size: 6.25 sizable TCW: 3.14 cts Main Diamond
Diamond, Platinum
Tiffany & Co Half Circle Round Diamond 0.33 Carat Wedding Band Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
: Platinum PT950 Size: 5.75 sizable TCW: 0.33 tcw Main Diamond: 11 Round Brilliant Diamonds Color
Diamond, Platinum
GIA Certified 13.75 Carat Hessonite Garnet & Diamond Platinum Cocktail Ring
Located in Miami, FL
x 12.40 x 8.30mm is set in platinum 950 with yellow gold prongs, flanked by 54 round brilliant
Hessonite, Diamond, Platinum, Yellow Gold, 18k Gold, Gold
Tiffany & Co. Round Diamond Bead Set Half Circle Band Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. Diamond Wedding Band Ring Style: Half-Circle Bead Set Metal: Platinum PT950 Size
Diamond, Platinum
Peter Suchy 2.59 Carat Purple Sapphire Diamond Dangle Platinum Earrings
By Peter Suchy
Located in Stamford, CT
Platinum Tested: Platinum Stamped: PT 950 11.6 grams Top to bottom: 43.48mm or 1.71 inches Width: 17.43mm
Diamond, Sapphire, Purple Sapphire, Platinum
Tiffany & Co FOREVER Full Circle Round Diamond 3.02 tcw Band Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
: 60003729 Metal: Platinum Pt950 Size / Measurements: 6.5 / 3.7 mm TCW: 3.02 tcw Main Diamond: 19 Pound
Diamond, Platinum
Tiffany & Co Soleste Cushion 0.74 cts F VVS1 Diamond Engagement Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Ref. number: 67806719 / T03040218 Metal: Platinum Pt950 Size: 7 sizable Measurements: 2 mm Main
Diamond, Platinum
Tiffany & Co. Round Diamond Bead Set Half Circle Band Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. Diamond Wedding Band Ring Style: Half-Circle Bead Set Metal: Platinum PT950 Size
Diamond, Platinum
Ritani Eternity Diamond Wedding Band Ring Micro Pave Set in Platinum
By Ritani
Located in San Diego, CA
Ritani Style: Micro Pave Diamond Eternity Band Metal: Platinum PT950 Width: 2.0 MM Size: 4
Diamond, Platinum
Peter Suchy .64 Carat Pear Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
diamonds, approx. total weight .14cts, F, VS 950 Platinum Tested: Platinum Stamped: PT 950 Hallmark: Made
Diamond, Platinum
Tiffany & Co Platinum Engagement Ring Round Diamond Solitaire 1.64 cts I VVS1
By Tiffany & Co.
Located in San Diego, CA
****/H1114**** Metal: Platinum Pt950 Size / Measurements: 5.25 - sizable TCW: 1.64 cts Main Diamond
Diamond, Platinum
Cosmic ring. 18k and Platinum Rocket Space Planetary theme band.
Located in Port Charlotte, FL
, planets, stars, and moon. 18k Yellow Gold with Platinum PT950 Various color sapphires. Details: 5.8
Sapphire, Gold, 18k Gold, Yellow Gold, Platinum
Tiffany & Co. Round Diamond 0.37 Cts F VVS1 Solitaire Engagement Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
. number: 28262221 Metal: Platinum PT950 Size: 4.5 sizable Main Diamond: Round Brilliant Diamond 0.37
Diamond, Platinum
Vintage 6.98 Carat Citrine and 2.54 Carat Diamond Platinum Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
interior of the shank with the platinum fineness mark (PT950), in addition to a maker's mark (ADAMEK). The
Citrine, Diamond, Platinum
$32,000Sale Price|20% Off
Tiffany & Co. Platinum Legacy Cushion Brilliant Cut Diamond Engagement Ring
By Tiffany & Co.
Located in Chicago, IL
platinum (PT950), the ring showcases a stunning center diamond weighing 1.72 carats, graded G color and VS1
Diamond, Platinum
15.00 Carat Geometric Kunzite Diamond Platinum Art Deco Pendant Necklace
Located in Stamford, CT
diamonds, H VS approx. .20cts 1 marquise shape diamond, H VS approx. .12cts Platinum Stamped: PT 950 14.2
Diamond, Kunzite, Platinum
Tiffany & Co. Legacy Cushion Diamond 1.33 Tcw Halo Engagement Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Metal: Platinum PT950 Size: 6 TCW: 1.33 tcw Main Diamond: Cushion Modified Brilliant Diamond 1.00
Diamond, Platinum
$31,200Sale Price|20% Off
GIA Certified Approx. 5 Carat MINOR OIL Emerald and Diamond Platinum Ring
By Antinori Fine Jewels
Located in Chicago, IL
Metal: Platinum (PT950) Gross Weight: 7.01 grams Ring Size: 6.5 (resizable) Certification: GIA Report
Diamond, Emerald, Platinum
Peter Suchy GIA Certified .84 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
# 5222473485 2 pear shape diamonds, F VS approx. .40cts Size 6.5 and sizable Platinum Stamped: PT950 5.8
Diamond, Platinum
GIA 1.99 Carat Old Mine Brilliant Cut Diamond Bezel Stud Platinum Earrings
Located in Stamford, CT
Platinum 950 Tested: Platinum Stamped: Pt 950 2.7 grams Top to bottom: 6.71mm or .27 inch Width: 6.55mm or
Diamond, Platinum
Cartier Ballerine GIA Cert .45 F VVS1 Diamond Platinum Engagement Ring Size 4.75
By Cartier
Located in Simpsonville, SC
4.75; 0.22" W Weight: 4.1 g Hallmarks: Cartier, PT 950, French platinum assay marks, maker's mark
Diamond, Platinum
$112,000Sale Price|20% Off
Tiffany & Co. 3.11 ct Platinum Solitaire Engagement Ring – Triple Excellent, VVS
By Tiffany & Co.
Located in Chicago, IL
Certificate, ensuring 100% authenticity. The stone is set in Tiffany’s iconic Classic Six-Prong Platinum
Diamond, Platinum
TIFFANY & CO Platinum Diamond Solitaire Engagement Ring Round 0.42 cts D VS1
By Tiffany & Co.
Located in San Diego, CA
: 19481263/F11190187 Metal: PLATINUM PT950 Size: 5.5 Sizable Band Width: 1.9 mm Main Diamond: Round
Diamond, Platinum
Tiffany & Co Platinum Diamond Engagement Ring Round Solitaire 1.72 cts H VVS2
By Tiffany & Co.
Located in San Diego, CA
Metal: Platinum PT950 Size: 7 sizable Measurements: 2 mm TCW: 1.72 cts Main Diamond: Round
Diamond, Platinum
Tiffany & Co. Elsa Peretti Diamonds by the Yard 0.37 ct Diamond Pendant Platinum
By Tiffany & Co.
Located in San Diego, CA
: 34641862 Metal: Platinum PT950 Size / Measurements: Small - 16' Inches TCW: 0.37 cts Main Diamond
Diamond, Platinum
Elsa Peretti Tiffany & Co. Round Brilliant Diamond Platinum Swan Ring
By Elsa Peretti for Tiffany & Co.
Located in London, GB
Signed TIFFANY & CO . Elsa Peretti Stamped PT950 for platinum From the Elsa Peretti's Swan collection
Diamond, Platinum
$22,400Sale Price|20% Off
Tiffany & Co. Soleste Platinum Ruby and Diamond Halo Stud Earrings
By Tiffany & Co.
Located in Chicago, IL
Tiffany squeeze backings Stamped “T&Co. PT950” for platinum Timeless, sophisticated, and instantly
Diamond, White Diamond, Ruby, Platinum
GIA Certified .54 Carat Light Brown Diamond Platinum Ring
Located in Stamford, CT
Transitional cut GIA certified natural light brown diamond. Vintage inspired platinum open work
Diamond, Brown Diamond, Platinum
Tiffany & Co. Elsa Peretti Diamonds by the Yard Platinum Diamond Chain Ring
By Elsa Peretti for Tiffany & Co.
Located in University Place, WA
: Elsa Peretti for Tiffany & Co. Collection: Diamonds by the Yard Material: Platinum (PT950) Diamond
Diamond, Platinum
Mikimoto Ladies Platinum White South Sea Cultured Pearl Diamond Pendant Necklace
By Mikimoto
Located in Houston, TX
be 950 platinum. Engraved with "PT950". The "Mikimoto" trademark (or hallmark) can also be found on
Diamond, Pearl, Platinum
Peter Suchy GIA Certified 1.51 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
sizable Platinum Stamped: PT950 5.1 grams Width at top: 11.1mm Height at top: 7.1mm Width at bottom
Diamond, Platinum
Tiffany & Co. Round Brilliant 0.47 cts I VS1 Diamond Platinum Engagement Ring
By Tiffany & Co.
Located in San Diego, CA
: 69450733 SKU: 171-15-69450733 Metal: Platinum PT950 Size: 6.25 - sizable TCW: 0.47 cts Main Diamond
Diamond, Platinum
$54,400Sale Price|20% Off
Tiffany & Co. Certified 2.00 Carat F VS1 Round Brilliant Diamond Platinum Ring
By Tiffany & Co.
Located in Chicago, IL
; Co. and Pt950, confirming the platinum mounting. The 2.00 carat diamond weight and serial number are
Diamond, White Diamond, Platinum
Fred of Paris Platinum Diamond Engagement Ring 1.22 Carat Sz 6 1/4
Located in Feasterville, PA
: Fred, Pt950, 53 Material: Platinum Metal Purity: 950 Color: White Main Stone: Diamond Size
Diamond, Platinum
Tycoon Cut 2.42 Carat Three-Stone Halo Design Diamond and Platinum Ring
By Tycoon
Located in San Diego, CA
Metal: Platinum PT950 Size: 5.75 - sizable Total Carat Weight: 2.42 TCW Center Diamond Shape: TYCOON
Diamond, Platinum
Tiffany & Co Channel Set Platinum Diamond Engagement Ring 2.75 ctw G VVS1
By Tiffany & Co.
Located in San Diego, CA
-Set Ref. number: 63847633 Metal: Platinum Pt950 Size / Measurements: 7.5 / 2.50-4.35 MM TCW: 2.75
Diamond, Platinum
Tiffany & Co Platinum Bezet Diamond Engagement Ring Round 0.57ct F VS1 Bezel Set
By Tiffany & Co.
Located in San Diego, CA
: Platinum PT950 Size / Measurements: 6.25 sizable TCW: 0.57 cts Main Diamond: Round Brilliant Diamond
Diamond, Platinum
Peter Suchy GIA 1.23 Carat Diamond Sapphire Halo Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Size 6.5 and sizable 950 Platinum Tested: Platinum Stamped: Pt 950 Hallmark: T 6.1 grams Width at top
Diamond, Sapphire, Blue Sapphire, Platinum
Tiffany & Co. Platinum 1.13 ct F VVS2 Pear Shape Diamond Soleste Engagement Ring
By Tiffany & Co.
Located in New York, NY
: Tiffany & Co. Collection: Soleste Metal: Platinum (Pt950) Hallmarks: © Tiffany & Co., Pt950
Diamond, Platinum
GIA Certified 1.34 Carat Diamond Platinum Gold Cluster Cocktail Ring
Located in Stamford, CT
princess cut diamonds, F-G VS approx. 1.76cts Size 6-6.25 not easily sizable Platinum Stamped: PT950 18k
Diamond, Yellow Diamond, Platinum
1.30 Carat Emerald Diamond Platinum Diamond by The Yard Necklace
Located in Stamford, CT
, approx. .80cts Platinum Stamped: PT950 8.7 grams Chain: 44 Inches
Diamond, Emerald, Platinum
Peter Suchy EGL Certified 1.35 Carat Diamond Platinum Dangle Earrings
By Peter Suchy
Located in Stamford, CT
, Approximate .30cts Platinum Stamped: PT950 2.4 grams Top to Bottom: 13.13mm or ½ Inch Width: 4.4mm or 3/16
Diamond, Platinum
Vintage 3.57 Carat Madagascan Sapphire 2.37 Carat Diamond Platinum Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
the interior of the shank with the platinum fineness mark (PT950) and the lozenge shaped makers mark
Diamond, Sapphire, 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.