5.05 Carat Round Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
weight .76cts, F – G, VS Size 6.75 and sizable 950 Platinum Tested: Platinum Stamped: PT 950 Hallmark
Diamond, Blue Sapphire, Sapphire, Platinum
Fred of Paris Platinum Diamond Engagement Ring 1.22 Carat Sz 6
Located in Feasterville, PA
: Platinum Metal Purity: 950 Color: White Main Stone: Diamond Size: US 6 Weight: 5.1 grams
Diamond, Platinum
Olympus Art Certified, Unique Art Piece, Diamond, Platinum, ANGEL WINGS Earrings
Located in Istanbul, TR
Olympus Art Certified, 950 PT Platinum, 1.87 ct. Diamond Round, 3.97 ct. Diamond Round, Unique
Diamond, Platinum
$60,000Sale Price|20% Off
Tiffany & Co. Soleste Platinum Cushion Diamond Double Halo Engagement Ring
By Tiffany & Co.
Located in Chicago, IL
the total diamond weight to 2.49 carats. Expertly crafted in platinum (PT950) and stamped “Tiffany&Co
Diamond, 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. The band marked
Diamond, Platinum
GIA Certified 3.10 Carat Emerald Diamond Platinum Pendant Necklace
Located in Stamford, CT
: Platinum Stamped: PT 950 Top to bottom: 21.51mm or .85 inch Width: 43.05mm or 1.70 inches Depth: 6.90mm
Diamond, Emerald, Platinum
Tiffany & Co Elsa Peretti 2.85 Carat Sapphire Platinum Bean Cufflinks
By Elsa Peretti for Tiffany & Co.
Located in Stamford, CT
, approx. 2.85cts Platinum Stamped: PT 950 Hallmark: TIffany + Co Elsa Peretti 28.4 grams Top to bottom
Sapphire, Platinum
Peter Suchy GIA 1.02 Round Sapphire Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
and sizable Platinum 950 Platinum Tested: Platinum Stamped: Pt 950 5.7 grams Width at top: 5.87mm
Diamond, Sapphire, Platinum
GIA Certified Diamond and Emerald Double Target Ring in Platinum
Located in London, England
approximate 6) but this can be sized upon request for a perfect fit. The ring is hallmarked PT 950 (for
Diamond, Emerald, Platinum
Peter Suchy 74.23 Carat Cabochon Aqua Diamond Platinum Dangle Earrings
By Peter Suchy
Located in Stamford, CT
2 Marquise Diamonds, approx. total weight .06cts, H, VS – SI1 Platinum Tested: Platinum Stamped: PT
Aquamarine, Diamond, Platinum
Tiffany & Co Platinum Round Diamond Engagement Ring 2.29 cts I VS1
By Tiffany & Co.
Located in San Diego, CA
: 1871728/F02270439 Metal: Platinum PT950 Size: 5 sizable Main Diamond: Round Brilliant Diamond 2.29 cts
Diamond, Platinum
Glittering Panda Bear Brooch With Black & White Diamonds Set in Platinum
Located in Palm Beach, FL
for such a compact size. The clip on the reverse side is stamped PT 950, designating platinum. Gross
Diamond, Platinum
Peter Suchy EGL Certified 1.60 Carat Round Diamond Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
# 055190370D Platinum Stamped: PT 950 2.7 grams Top to bottom: 3.8mm or .54 Inches Width: 7.6mm or .30 Inches
Diamond, Platinum
Elsa Peretti for Tiffany & Co. .02 Carat Diamond Platinum Band Ring
By Elsa Peretti for Tiffany & Co.
Located in Stamford, CT
round brilliant cut diamond, G-H VS approx. .02cts Size 5.5 and sizable. Platinum Stamped: PT 950
Diamond, Platinum
Tiffany & Co Platinum Together Double Milgrain Wedding Band 6 mm Size 7.5
By Tiffany & Co.
Located in New York, NY
Milgrain Hallmarks: ©Tiffany & Co. PT950 Metal: Platinum Finger Size: 7.5 ( Sizable at any Tiffany & Co
Platinum
Tiffany & Co Novo Full Circle Diamond Wedding Band Ring Platinum
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co NOVO Full Circle Diamond Band Style: Full Circle Metal: Platinum PT950 Size: 5.5
Diamond, Platinum
Peter Suchy GIA 1.53 Carat Diamond Halo Octagonal Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
#2175424377 16 round diamonds, approx. total weight .16cts Size 6.5 and sizable 950 Platinum Tested: Platinum
Diamond, Platinum
Tiffany & Co. Platinum and Diamond Wedding Band Ring 2.5 MM
By Tiffany & Co.
Located in San Diego, CA
: Platinum PT950 Total Carat Weight: 0.24 Cts. Diamond Shape: Round Brilliant Diamond Color & Clarity: F
Diamond, Platinum
Tiffany & Co Channel Set Platinum Diamond Engagement Ring Round 1.03 ct F VVS2
By Tiffany & Co.
Located in San Diego, CA
Diamond Certificate: 31137748/N09240084 Metal: Platinum PT 950 Size: 6 - sizable TCW: 1.36 tcw Main
Diamond, Platinum
Peter Suchy 6.56 Carat Tourmaline Diamond Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
approx. .15cts Platinum Stamped: PT950 6.4 grams Top to bottom: 31.3mm or 1.25 Inches Width: 8.1mm or 1
Diamond, Tourmaline, Platinum
Tiffany & Co. Platinum Double Soleste Round Shape 3ct Tanzanite Diamond Ring
By Tiffany & Co.
Located in New York, NY
images for reference. Details Brand: Tiffany & Co. Collection: Soleste Metal: Platinum (Pt950
Diamond, Tanzanite, Platinum
$68,000Sale Price|20% Off
Tiffany & Co. Certified 2 Carat Round Brilliant Diamond Platinum Ring
By Tiffany & Co.
Located in Chicago, IL
. The platinum setting is properly hallmarked “Tiffany & Co.” and “Pt950,” confirming its solid
Diamond, White Diamond, Platinum
Tiffany & Co. Round Brilliant Diamond 1.22 cts I VS1 Platinum Engagement Ring
By Tiffany & Co.
Located in San Diego, CA
Ref. number: 33402309 Metal: Platinum Pt950 Size / Measurements: 4.75 - sizable Main Diamond
Diamond, Platinum
Tiffany & Co Platinum Harmony Round Diamond 0.44 ct H VS1 Engagement Ring
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co Harmony Diamond Engagement Ring Style: Prong Set Solitaire Metal: Platinum Pt950
Diamond, Platinum
Peter Suchy .58 Carat Oval Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
, VS1.58 12 round diamonds, approx. total weight .09cts, F, VS 950 Platinum Tested: Platinum Stamped: PT
Diamond, Platinum
Art Deco Inspired Asscher Cut Diamond Ring in Platinum
Located in London, England
gross weight of 3.4 grams. Lastly the band is hallmarked Pt, 950 (for platinum).
Diamond, Platinum
1950s Cultured Pearl and 1.02 Carat Diamond Platinum Cluster Ring
Located in Jesmond, Newcastle Upon Tyne
interior of the shank with the mark for platinum (PT950) and maker's mark 'SC'. This vintage 1950s
Diamond, Pearl, Cultured Pearl, Platinum
Fred of Paris Platinum Diamond Engagement Ring 1.25 Carat Sz 6 1/2
Located in Feasterville, PA
Hallmarks: Fred, Pt950, 54 Material: Platinum Metal Purity: 950 Color: White Main Stone: Diamond Weight: 5.1
Diamond, Platinum
.42 Carat Round Brilliant Cut Diamond Platinum Eternity Band Ring
Located in Stamford, CT
sizable Platinum Stamped: PT 950 7.4 Grams Width at top: 3.3mm Height at top: 3.2mm Width at bottom
Diamond, Platinum
Tiffany & Co. Soleste Platinum Diamond Halo Stud Earrings 2.77 Carats Total
By Tiffany & Co.
Located in Chicago, IL
to approximately 2.77 carats. Expertly crafted in platinum (Pt950), the earrings measure
Diamond, White Diamond, Platinum
Round Diamonds Three-Stone Engagement Ring 1.00 Carat in Platinum
Located in San Diego, CA
Three-Stone Diamond Engagement Ring Metal: Platinum PT950 Size: 6 - sizable Total Carat Weight
Diamond, Platinum
10.35 Carat Rectangle Aquamarine Ruby Diamond Platinum Engagement Ring
Located in Stamford, CT
diamonds, G VS SI approx. .15cts Size 6.5 and sizable Platinum Stamped: PT 950 8.1 grams Width at top
Aquamarine, Diamond, Ruby, Platinum
Tiffany & Co. 2.6 Carat True Solitaire Diamond Engagement Ring in Platinum
By Tiffany & Co.
Located in Chicago, IL
luxurious platinum PT950. The sophisticated geometry of the center diamond delivers exceptional brilliance
Diamond, Platinum
Tiffany & Co. Platinum Novo 2mm 0.18 cts Total Half-Circle Band Ring
By Tiffany & Co.
Located in New York, NY
: Tiffany & Co. Style: Novo Hallmarks: Tiffany & Co. PT950 Metal: Platinum Weight: 2.9 grams Finger
Diamond, Platinum
$46,400Sale Price|20% Off
Tiffany & Co. 1.60 Carat Platinum Round Brilliant Cut Diamond Ring
By Tiffany & Co.
Located in Chicago, IL
Clarity: VVS2 (exceptionally clean) Metal: Platinum (PT950) Ring Size: 5.5 (resizable)
Diamond, White Diamond, Platinum
Vintage 33.20 Carat Aquamarine 3.59 Carat Diamond and Platinum Pendant
Located in Jesmond, Newcastle Upon Tyne
necklace is hallmarked with the platinum mark (Pt950) and the necklace has been independently tested using
Aquamarine, Diamond, Platinum
$36,000Sale Price|20% Off
Tiffany & Co. 1.52 Carat Cushion Cut Diamond Platinum Solitaire Ring
By Tiffany & Co.
Located in Chicago, IL
: Tiffany & Co. Style: Solitaire engagement ring Metal: Platinum PT950 Center Diamond: Round Brilliant
Diamond, White Diamond, Platinum
$76,000Sale Price|20% Off
Harry Winston 2.34 Carat Round Brilliant Diamond Platinum Engagement Ring
By Harry Winston
Located in Chicago, IL
its identity and authenticity. The ring is crafted in platinum (PT950), weighs approximately 5.1
Diamond, Platinum
Tiffany & Co Forever Platinum Diamond Band Ring 3mm Half Circle Shared Prong
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. FOREVER Half Circle Diamond Band Ring Style: Half-circle Band Metal: Platinum
Diamond, Platinum
$78,400Sale Price|20% Off
Tiffany & Co. Platinum 2.26 Carat Emerald-Cut Diamond Engagement Ring
By Tiffany & Co.
Located in Chicago, IL
& Co. Metal: Platinum (PT950) Center Diamond: 2.26 ct emerald cut, F / VS1 Side Diamonds: 2 trillion
Diamond, White Diamond, Platinum
Tiffany & Co. Diamond Ring in 18K Yellow Gold and Platinum
By Tiffany & Co.
Located in Chicago, IL
ring is expertly crafted with an 18K yellow gold band and platinum (PT950) prongs in the classic
Diamond, Platinum, 18k Gold, Yellow Gold
Tiffany & Co 1.10 Ct Platinum Harmony Solitaire Diamond Engagement Ring H VS1
By Tiffany & Co.
Located in New York, NY
Metal: Platinum (Pt950) Hallmarks: © Tiffany & Co., PT950, D1.10ct, Serial Number Finger Size: 6.5
Diamond, Platinum
Tiffany & Co Princess Cut Diamond 0.73 Cts Solitaire Platinum Engagement Ring
By Tiffany & Co.
Located in San Diego, CA
Diamond Registration #: 22956515/I04190390 Metal: Platinum PT950 Size: 6 sizable TCW: 0.73 cts Main
Diamond, Platinum
Tiffany & Co Platinum Round Diamond 0.91 cts E VVS2 Solitaire Engagement Ring
By Tiffany & Co.
Located in San Diego, CA
Metal: Platinum Pt950 Size: 4.25 sizable Main Diamond: Round Brilliant Diamond 0.91 cts Color
Diamond, Platinum
.66 Carat Diamond Blue Sapphire Platinum Pendant Necklace
Located in Stamford, CT
, approx. .15cts Platinum Stamped: PT950 5.7 grams Top to bottom: 22.5mm or 7/8 Inch Width: 17.4mm or 5
Diamond, Sapphire, Blue Sapphire, 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. Appraised
Sapphire, Gold, 18k Gold, Yellow Gold, Platinum
Harry Winston Tryst Single Row Pave Diamond Wedding Band in Platinum
By Harry Winston
Located in San Diego, CA
: WBDPRD1RTST Metal: PLATINUM PT950 Size: 4 sizable Measurements: 3.3 MM at the widest point TCW: 0.12 tcw
Diamond, Platinum
$6,652Sale Price|25% Off
GIA Certified 4.63ct Burma Cabochon Ruby Platinum Engagement Ring
By OGI Ltd
Located in New York, NY
: 9.55 x 9.05 mm Setting: Vintage Platinum Material: Platinum, marked Pt950 Weight: 11.98 grams (gross
Diamond, Ruby, Platinum
Tiffany & Co Platinum Round Diamond 0.94 cts F VS1 Solitaire Engagement Ring
By Tiffany & Co.
Located in San Diego, CA
Metal: Platinum PT950 Size: 6.25 sizable Main Diamond: Round Brilliant Diamond 0.94 cts Color
Diamond, Platinum
$184,000Sale Price|20% Off
Tiffany & Co. Platinum 3.53 Carat Round Cut Diamond Engagement Ring
By Tiffany & Co.
Located in Chicago, IL
Platinum Setting (Pt950), the most sought-after design for its timeless beauty and secure structure. The
Diamond, White Diamond, Platinum
Tiffany & Co Platinum Diamonds Forever Half Circle Diamonds Band Ring 3mm
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. FOREVER Half Circle Diamond Band Ring Style: Half-circle Band Metal: Platinum
Diamond, Platinum
Vintage Tiffany and Co Knife Edge Ring. Authentic Platinum Wedding Band. T&CO
By Tiffany & Co.
Located in Port Charlotte, FL
Rare Tiffany and Co. Platinum Pt950 Knife Edge Wedding band Details: Size 7.5 2mm wide 2.5grams
Platinum
Fred of Paris Platinum Diamond Engagement Ring 1.22Ct Sz 5 3/4
Located in Feasterville, PA
: Fred, Pt950, 51 Material: Platinum Metal Purity: 950 Color: White Main Stone: Diamond Size
Diamond, Platinum
Antique Art Deco 1.01 Carat Diamond and Platinum Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive antique Art Deco 1.01 carat diamond and platinum cocktail ring
Diamond, Platinum
Tiffany & Co. Platinum and Diamond Wedding Band Ring 2.5 MM
By Tiffany & Co.
Located in San Diego, CA
Metal: Platinum PT950 Total Carat Weight: 0.24 Cts. Diamond Shape: Round Brilliant Diamond Color
Diamond, Platinum
Vintage 1940s 1.29 Carat Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
the mark for platinum (PT950). This vintage diamond solitaire ring is supplied with an independent
Diamond, Platinum
$38,400Sale Price|20% Off
GIA Certified Emerald-Cut 7 Carat Diamond Eternity Band in Platinum
Located in Chicago, IL
and VVS1 to VS1 clarity. Crafted in platinum (PT950), the setting offers both durability and a sleek
Diamond, Emerald, 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.