Tiffany & Co. Platinum Knife Edge Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Band ring features a sleek knife edge fully around Brightly polished Stamped PT950 for platinum
Platinum
Tiffany & Co. Platinum Diamond Flower Ring 0.60ct 4.54g
By Tiffany & Co.
Located in SYDNEY, NSW
An elegant and authentic Tiffany & Co. diamond flower ring crafted in platinum (Pt950
Diamond, Platinum
Contemporary Diamond Platinum Channel Anniversary Band Ring
Located in Philadelphia, PA
carat with I to K color and SI clarity Stamped PT950 for platinum Circa: 2000s Ring Size: 6 & sizable
Diamond, White Diamond, Platinum
Tiffany & Co .76 Carat Diamond Halo Platinum Engagement Ring
By Tiffany & Co.
Located in Stamford, CT
grams Tested: Platinum Stamped: PT 950 Hallmark: Tiffany & Co Width at top: 8.24mm Height at top
Diamond, Platinum
Natural Blue Sapphire and Diamond Platinum Engagement Ring
Located in Stamford, CT
Tested: Platinum Stamped: PT 950 Width at top: 8.24mm Height at top: 6.88mm Width at Bottom: 2.59mm
Blue Sapphire, Diamond, Platinum
.98 Carat Two Diamond Platinum Pendant Necklace
Located in Stamford, CT
diamonds H SI, approx. .3ct Platinum Stamped: PT950 3.3 grams Top to bottom: 21.67mm or 13/16 Inch Width
Diamond, Platinum
Tiffany & Co. Schlumberger 16-Stone Diamond and Platinum Ring 1.14 Carat
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. Style: Schlumberger Sixteen Stone Ring Metal: Platinum PT 950 Size: 7 Total Carat
Diamond, Platinum
Platinum GIA Certified Diamond Halo Ring by Ritani
By Ritani
Located in Webster, NY
Center Diamond Clarity: SI1 Certification: GIA - 14605217 Metal: Platinum Stamped: "Pt950" "Ritani
Diamond, Platinum
Vintage 0.90 Carat Diamond Platinum Tennis Player Charm
Located in Philadelphia, PA
clarity Completed by jump ring bale Numbered with maker's mark Stamped 950 Pt for platinum Measures: 1
Diamond, White Diamond, Platinum
Tiffany & Co. Platinum Knife-Edge Wedding Band Ring
By Tiffany & Co.
Located in New York, NY
Brand: Tiffany & Co. Style: Knife-Edge Hallmarks: Tiffany & Co. PT950 Metal: Platinum Finger Size: 6
Platinum
Vintage Tasaki Diamond Floral Pendant in Platinum
By TASAKI
Located in London, England
pendant is signed and hallmarked Tasaki logo, PT950 (for platinum), 0.31 (for diamond weight). Lastly, a
Diamond, Platinum
Tiffany & Co. Platinum Diamond Engagement Ring 0.18ct 3.6g
By Tiffany & Co.
Located in SYDNEY, NSW
: Platinum PT950 Carat: 0.18ct Colour: D Clarity: VVS2 Cut: Round Brilliant Cut Weight: 3.6 grams Engravings
Diamond, Platinum
Tiffany & Co. Circlet Collection Platinum Diamond Engagement Ring
By Tiffany & Co.
Located in Baltimore, MD
: Platinum PT950 Weight: 3.87 grams Diamonds: Approx. .65 CTW F-G VS Top of ring is 8.5mm Size: 7.5 (US)
Diamond, Platinum
Tiffany & Co. Diamond Platinum Etoile Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
diamonds weighing approximately 0.22 carat; F/G color with VS clarity Signed T & Co. and stamped PT950 for
Diamond, White Diamond, Platinum
Tiffany & Co. GIA Certified Diamond Platinum Engagement Ring
By Tiffany & Co.
Located in Beverly Hills, CA
Classic Tiffany & Co. six prong modern diamond platinum engagement ring. Featuring a 0.99 carat GIA
Diamond, Platinum
Tiffany & Co. Platinum Knife-Edge Wedding Band Ring
By Tiffany & Co.
Located in New York, NY
Brand: Tiffany & Co. Style: Knife-Edge Hallmarks: Tiffany & Co. PT950 Metal: Platinum Finger Size: 5.5
Platinum
Tiffany & Co. Platinum Dragonfly Pendant on a Chain
By Tiffany & Co.
Located in New York, NY
TIFFAY & CO. PLATINUM DRAGONFLY PENDANT AND CHAIN A charming and collectable Tiffany & Co
Diamond, Platinum
1990s Classic Tiffany & Co. Platinum Unisex Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Completed by a high polish Fully signed 1990 Tiffany & Co. Stamped PT950 for platinum Ring Size: 5 1/2
Platinum
Contemporary 1.51 Carat Sapphire Diamond Platinum Engagement Ring
Located in Philadelphia, PA
total approximately 0.35 carat with G/H color and VS clarity With maker's mark and stamped PT950 for
Diamond, Sapphire, Platinum
1940s 9.39 Carat Natural Pear Aqua Diamond Platinum Dangle Earrings
Located in Stamford, CT
.38cts, G, VS2 950 Platinum Platinum Tested: 950 Platinum Stamped: Pt 950 8.5 grams Top to bottom
Aquamarine, Diamond, Platinum
Tiffany & Co. Diamond Platinum Etoile Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
diamonds weighing approximately 0.22 carat; F/G color with VS clarity Signed T & Co. and stamped PT950 for
Diamond, White Diamond, Platinum
Peter Suchy 6.41 Carat Marquise Diamond Platinum Flower Earrings
By Peter Suchy
Located in Stamford, CT
, approx. total weight .10cts, F, VS2 – SI1 950 Platinum Tested: Platinum Stamped: Pt 950 Top to bottom
Diamond, Platinum
Antique 1.13Ct Diamond and Platinum Necklace Circa 1920
Located in Jesmond, Newcastle Upon Tyne
impressive antique diamond necklace is hallmarked to the ring loop of the clasp with the platinum mark (PT950
Diamond, Platinum
Cartier Trinity Ceramic Diamond Gold Platinum Band Ring
By Cartier
Located in Southampton, PA
Gorgeous Cartier Diamond Three-Band Trinity Ring in Platinum, Ceramic, and 18k White Gold. With
Diamond, 18k Gold, Platinum
Sold|$33,644
3.60 Carat Diamond and Platinum Trilogy Ring
Located in Jesmond, Newcastle Upon Tyne
shank with the platinum fineness marks (PT950 and 950), the maker's mark 'XM' and the Birmingham Assay
Diamond, Platinum
Tiffany & Co Platinum Lucida Cut Diamond Ring 0.75ct
By Tiffany & Co.
Located in SYDNEY, NSW
4.27 grams, Ring Size J. Metal: Platinum PT950 Carat: 0.75ct Colour: I Clarity: VS2 Cut: Square Mixed
Diamond, Platinum
Tiffany & Co Platinum Lucida Cut Diamond Ring 0.75ct
By Tiffany & Co.
Located in SYDNEY, NSW
4.27 grams, Ring Size J. Metal: Platinum PT950 Carat: 0.75ct Colour: I Clarity: VS2 Cut: Square Mixed
Diamond, Platinum
Hammerman Brothers Diamond and Sapphire Set Platinum Earrings
By Hammerman Brothers
Located in Litchfield, CT
diamonds and .90 carats total weight sapphires HALLMARKS: HB for Hammerman Brothers, PT and 950 for
White Diamond, Blue Sapphire, Platinum
Sold|$2,400 / item
Amethyst 1.50 CTW Diamond Platinum Cluster Pendant Necklace
Located in Philadelphia, PA
stamped PT950 for platinum Circa: 2000s Length: 17 1/2 inches Pendant measures: 5/8 x 11/16 inch Total
Amethyst, Diamond, Platinum
Hammerman Brothers Asscher Cut Diamond 3 Stone Platinum Engagement Ring
Located in Stamford, CT
.80cts, F, VVS 950 Platinum Tested: Platinum Stamped: Pt 950 Hallmark: HB 8.9 grams Width at top: 7.26mm
Diamond, Platinum
Tiffany & Co. 1.60 Carat Diamond Platinum Link Earrings
By Tiffany & Co.
Located in Philadelphia, PA
omega backs Fully signed Tiffany & Co. and stamped PT950 for Platinum Measures: approx. 5/8 x 3/8 inch
Diamond, Platinum
Tiffany & Co. 1.60 Carat Diamond Platinum Link Earrings
By Tiffany & Co.
Located in Philadelphia, PA
omega backs Fully signed Tiffany & Co. and stamped PT950 for Platinum Measures: approx. 5/8 x 3/8 inch
Diamond, Platinum
1940s 3.35 Carat Diamond and Platinum Cocktail Watch
Located in Jesmond, Newcastle Upon Tyne
caseback hallmarked with the platinum mark (pt-950) the maker's icon (Cervin Watch/Matterhorn) and the four
Diamond, Platinum
.33 Carat Diamond Platinum Art Deco Pendant Neckalce
Located in Stamford, CT
, Approximate .15ct 6 single cut H-I VS diamonds, Approximate .18cts Chain: 18 Inches Platinum Stamped: PT950
Diamond, Platinum
Tiffany & Co Ruby Diamond Gold Platinum Wedding Band Ring
By Tiffany & Co.
Located in Stamford, CT
, VS Platinum & 18k yellow gold Tested: 18k & Platinum Stamped: PT 950/750 Hallmark: Tiffany & Co
Diamond, Ruby, 18k Gold, Platinum, Yellow Gold
Tiffany & Co. Diamond Platinum Channel Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Diamonds are G/H in color with VS clarity Completed by grooved shoulders and sleek shank Stamped PT950
Diamond, White Diamond, Platinum
Tiffany & Co. Classic Platinum Millegrain Wedding Band Stacking Ring
By Tiffany & Co.
Located in Philadelphia, PA
Tiffany & Co. Stamped PT950 for platinum Ring Size: 6 1/2 Top measures: 2.9 mm and sits 1.7 mm high
Platinum
Tiffany & Co. Platinum 6 Prong Solitaire Setting Semi Mount Ring
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co Solitaire Semi-Mount Style: Six - Prong Solitaire Setting Metal: Platinum PT950
Platinum
Tiffany & Co. Platinum Knife Edge Wedding Band Stack Ring
By Tiffany & Co.
Located in Philadelphia, PA
Band style ring designed with knife edge detailing Featuring high polished finish Stamped PT950
Platinum
Cartier 1.25 Carat Sapphire Diamond Platinum Unisex Cross Pendant Charm
By Cartier
Located in Philadelphia, PA
numbered Stamped PT 950 for platinum Measures: 7/16 x 7/8 (including bale) inch Total weight: 2.8
Diamond, Sapphire, Platinum
EGL Certified .68 Carat Diamond Platinum Pendant Necklace
Located in Stamford, CT
EGL Certificate # 400145984D 1 baguette diamond, H-I VS approx. .10cts Platinum Stamped: PT950 2.9
Diamond, Platinum
GIA Certified Diamond Solitaire Engagement Ring Made in Platinum
Located in Webster, NY
12199179 Metal: Platinum Stamped: "PT950" Ring Size: 6 - sizable
Diamond, Platinum
Tiffany & Co. Platinum Diamond Etoile Circle Donut Pendant Necklace
By Tiffany & Co.
Located in Southampton, PA
Weight: 0.18ctw Stamped Hallmarks: Tiffany & Co Platinum PT950 *Free Shipping within the United States
Diamond, Platinum
GIA Certified 1.37 Carat Emerald Diamond Platinum Pendant Necklace
Located in Stamford, CT
SI diamond, Approximate .20ct Platinum Stamped: PT 950 6.1 grams Top to bottom: 21.7mm or 13/16
Diamond, Emerald, Platinum
Tiffany & Co. Lucida Diamond Platinum Anniversary Stacking Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Channel set with highly polished edges Fully signed Tiffany & Co. Lucida and numbered Stamped PT950 for
Diamond, Platinum
Peter Suchy GIA Certified 1.32 Carat Diamond Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
brilliant cut diamond, J VS approx. 1.32cts GIA certificate # 2215887671 Platinum Stamped: PT 950 1.6 grams
Diamond, Platinum
Tiffany & Co Platinum Channel-set Half Circle Diamond Sapphire Band Ring
By Tiffany & Co.
Located in New York, NY
Brand: Tiffany & Co. Metal: Platinum (Pt950) Hallmarks: © Tiffany & Co., PT950 Finger Size: 5
Diamond, Sapphire, Platinum
Sold|$5,424
1.10 Carat Diamond and Platinum Trilogy Ring
Located in Jesmond, Newcastle Upon Tyne
fineness marks (PT950 and 950), the maker's mark 'XM' and the Birmingham Assay Office hallmark (anchor
Diamond, Platinum
Tiffany & Co. Platinum Knife-Edge Wedding Band Ring Size 7
By Tiffany & Co.
Located in New York, NY
Hallmarks: Tiffany & Co. PT950 Metal: Platinum Finger Size: 7 Weight : 2.9 grams Width: 2mm Retails $700
Platinum
Tiffany & Co .54 Carat Diamond Platinum Open Heart Pendant Necklace
By Tiffany & Co.
Located in Stamford, CT
Platinum Stamped: PT 950 Hallmark: Tiffany & Co 4.6 grams Pendant: .61 inches across and .54 inches top
Diamond, Platinum
Tiffany & Co. Platinum Soleste Half Eternity Ring 0.17ct 3g
By Tiffany & Co.
Located in SYDNEY, NSW
. Signed Tiffany & Co PT950. Metal: Platinum Carat: 0.17ct Colour: N/A Clarity: N/A Cut: Round
Diamond, Platinum
Contemporary Tiffany & Co. Diamond Platinum Anniversary Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
2000 Fully signed Tiffany & Co. and numbered Stamped PT950 for platinum Ring Size: 7 1/2 & sizable
White Diamond, Platinum
Estate Tiffany & Co. Classic Platinum Wedding Band Signed Jewelry
By Tiffany & Co.
Located in Torrance, CA
inches), rising 2mm from the finger. Metal & Hallmark: 950 platinum. The ring is hallmarked "PT950" for
Platinum
1950s 2.76 Carat Diamond and Platinum Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
hallmarked to the interior of the shank with the platinum mark (PT950). This impressive vintage cluster
Diamond, Platinum
Contemporary .75 Carat Diamond Platinum Anniversary Band Ring
Located in Philadelphia, PA
approximately .75 carat total with G/H color and SI clarity With maker's mark Stamped PT950 for platinum
Diamond, White Diamond, Platinum
Tiffany & Co. Elsa Peretti Curve Band Diamond Platinum Ring
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. Style: Elsa Peretti Curve Band Ring Sku Number: 12060424 Metal: Platinum PT950
Diamond, Platinum
Sold|$10,917
1.56 Carat Diamond and Platinum Twist Ring
Located in Jesmond, Newcastle Upon Tyne
the interior of the shank with the platinum fineness marks (PT950 and 950), the maker's mark (XM) and
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.