Tiffany & Co. Platinum Diamond Circlet Necklace
By Tiffany & Co.
Located in San Fernando, CA
Tiffany & Co. Platinum (PT950) Circlet Collection Necklace Lariat style Pendant Circlet connecting
Diamond, Platinum
Sold|$3,500
Art Deco Natural Jade Platinum Pin
Located in Litchfield, CT
inch by 1 1/8 inch WEIGHT: 12.0 grams STONES: Natural Jadeite Jade HALLMARKS: Platinum, PT
Jade, Platinum
Sold|$3,900
Sidney Garber Diamond Earrings Platinum
Located in Litchfield, CT
STONES: 1.80 carats total weight of G color, VS clarity diamonds HALLMARKS: Garber, 18k, PT 950 for
Diamond, 18k Gold, White Gold, Platinum
Sold|$29,995
Tiffany & Co. Diamond Platinum Bubbles Necklace
By Tiffany & Co.
Located in Stamford, CT
weight 8.40 cts Platinum Stamped: Pt950 Tested: Platinum Hallmark: c 2002 Tiffany & Co 78.0 Grams
Diamond, Platinum
0.75 Carat Diamond Platinum Eternity Band Ring
Located in Stamford, CT
Tested: Platinum Stamped: Pt 950 2.8 grams Width at top: 2mm Height at top: 2mm Width at Bottom: 2mm
Diamond, Platinum
Tiffany & Co. Platinum Soleste Diamond Ring 0.94ct 5.1g
By Tiffany & Co.
Located in SYDNEY, NSW
An elegant Tiffany & Co. Soleste diamond ring crafted in platinum (PT950), showcasing the
Diamond, Platinum
Sold|$2,495
1.50 Carat Diamond Platinum Hoop Earrings
Located in Stamford, CT
Stamped: PT 950 7.2 grams Top to bottom: 25.4mm or 1 Inch Width: 2.5mm or .10 Inches Depth or thickness
Diamond, Platinum
Tiffany & Co Platinum Lucida Wedding Band 7.58g
By Tiffany & Co.
Located in SYDNEY, NSW
enduring sophistication. Metal: Platinum PT950 Carat: N/A Colour: N/A Clarity: N/A Cut: N/A Weight: 7.58
Platinum
Tiffany & Co. Platinum Forever Wedding Band 14.82g
By Tiffany & Co.
Located in SYDNEY, NSW
grams. Featuring a 6mm wide band and Ring Size R. Metal: Platinum PT950 Carat: N/A Colour: N/A Clarity
Platinum
Tiffany & Co. Platinum Forever Wedding Band 14.82g
By Tiffany & Co.
Located in SYDNEY, NSW
grams. Featuring a 6mm wide band and Ring Size R. Metal: Platinum PT950 Carat: N/A Colour: N/A Clarity
Platinum
Sold|$6,225
Platinum, Ceylon Sapphire & Diamond Ring
Located in Brisbane City, QLD
bands and eternity rings can be made to sit either side. Marked - 'PT950' for platinum purity
Diamond, Sapphire, Platinum
Sold|$21,000
Art Deco Diamond Set Platinum Bracelet
Located in Litchfield, CT
color and VS2-SI1 clarity diamonds HALLMARKS: PT 950 for platinum, 0.585 for 14k for tongue of catch
White Diamond, Platinum
Sold|$12,000
Art Deco Diamond and Platinum Bracelet
Located in Chicago, IL
bracelet is a must! Stamp: PT950 (maker's mark) Material: Platinum Measurements: 7 1/4 inches long Gross
Diamond, Platinum
Two Row 1.20 Carat Diamond Platinum Wedding Band
Located in Stamford, CT
5MM Wide 24 round diamonds F VS full cut approximately 1.20 carats Platinum Stamped: PT 950 Tested
Diamond, Platinum
Tiffany & Co. Tiffany Diamond Platinum Double-Drop Earrings
By Tiffany & Co.
Located in Stamford, CT
full cut diamonds, approx. total weight 1.40cts, F, VS 950 platinum Tested: platinum Stamped: PT 950
Diamond, Platinum
Black Sea Pearl Tube Set Diamond Platinum Earrings
Located in Stamford, CT
Black South Sea Pearls Platinum Stamped: PT 950 6.4 grams
Black Pearl, Diamond, Platinum
Tiffany & Co Platinum .40ctw Diamond Horseshoe Necklace
By Tiffany & Co.
Located in New York, NY
" Hallmark: Tiffany & Co., PT950 Metal: 950 Platinum Notes: Includes box Item #: BR-1806-021926-01
Diamond, Platinum
1999 Tiffany & Co. Platinum Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Wide band ring is designed with a rounded curvature With a brightly polished finish Stamped PT950
Platinum
Tiffany & Co. Platinum Unisex Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Wide band ring is designed with a rounded curvature With a brightly polished finish Stamped PT950
Platinum
Tiffany & Co. Etoile Solid Platinum Diamond 4mm Eternity Band Ring Sz 6
By Tiffany & Co.
Located in Montclair, NJ
Material: Solid .900+ Platinum (tested), Stamped PT950 Weight: 8.17 Grams Ring Size: 6.0 (We can custom
Diamond, Platinum
Tiffany & Co. Diamond Platinum Jazz Cross Pendant Necklace
By Tiffany & Co.
Located in Stamford, CT
: Pt 950 Tested: Platinum Hallmark: Tiffany & Co Top to Bottom: 29.27mm or 1.15 inch Width: 20.75mm
Diamond, Platinum
Tiffany & Co. Platinum Men's Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
inscription 'Love and Cherish' Stamped PT950 for platinum Fully signed Tiffany & Co. Circa: 2000s Ring
Platinum
Tiffany & Co Platinum Diamond Engagement Ring 1.00ct
By Tiffany & Co.
Located in SYDNEY, NSW
A Tiffany & Co Diamond Engagement Ring, made of 950 Platinum. Set with an Oval, Brilliant Cut
Diamond, Platinum
Sold|$9,150
Emerald Step Cut Diamond Platinum Ring c1940
Located in Stamford, CT
8 baguette cut diamonds, approx. total weight .67cts, H, VS 7.1 grams Platinum Stamped: PT 950
Diamond, Platinum
Tiffany & Co Platinum Soleste Diamond Ring 0.17ct
By Tiffany & Co.
Located in SYDNEY, NSW
colour, VS clarity, with a total carat weight of 0.17ct. Metal: Platinum PT950 Carat: 0.17ct Colour: F
Diamond, Platinum
Tiffany & Co. Sapphire Diamond Platinum Wedding Band Ring
By Tiffany & Co.
Located in Stamford, CT
Platinum 3.2 grams Tested: Platinum Stamped: PT 950 Hallmark: FFANY Width at top: 3.1mm Height at top
Blue Sapphire, Diamond, Platinum
GIA Certified 7.40 Carat Diamond Platinum Pendant Necklace
Located in Stamford, CT
.70cts, H, VS – SI 950 Platinum Tested: Platinum Stamped: PT 950 12.3 grams Top to bottom: 33.08mm or
Diamond, Platinum
PLATINUM Natural Diamond Cluster Ring 0.67TCW
Located in Victoria, BC
This platinum ring offers a sophisticated design with durable construction and quality diamond
Diamond, Platinum
Tiffany & Co .30 Carat Diamond Platinum Flower Ring
By Tiffany & Co.
Located in Stamford, CT
sizable Platinum Stamped: PT 950 Hallmark: Tiffany & Co
Diamond, Platinum
Tiffany & Co. Peretti Diamond Platinum Five Bean Necklace
By Elsa Peretti for Tiffany & Co.
Located in Stamford, CT
, length: 16 inches. Hallmark: Tiffany & co Peretti. Stamped: PT 950 Metal: Platinum. 7.7 grams.
Diamond, Platinum
Oval Cornflower Blue Sapphire Diamond Platinum Ring
Located in Stamford, CT
, VS1 Platinum Tested: Platinum Stamped: PT 950 Hallmark: D0.71 Width at top: 13.2mm Height at top
Blue Sapphire, Diamond, Platinum
Tiffany & Co. Platinum Harmony Diamond Ring 0.17ct
By Tiffany & Co.
Located in SYDNEY, NSW
a timeless, delicate setting. Metal: Platinum PT950 Carat: 0.17ct Colour: F Clarity: VS2 Cut: Round
Diamond, Platinum
Tiffany & Co Platinum Diamond Wedding Ring 0.22ct
By Tiffany & Co.
Located in SYDNEY, NSW
This elegant Tiffany & Co. platinum ring (PT950) features a total of 15 round brilliant-cut
Diamond, Platinum
Tiffany & Co Platinum Forever Wedding Band Ring 8.52g
By Tiffany & Co.
Located in SYDNEY, NSW
comfortable and secure fit. Metal: Platinum PT950 Carat: N/A Colour: N/A Clarity: N/A Cut: N/A Weight: 8.52
Platinum
Cartier Destinee 1.59 Carat Platinum Diamond Engagement Ring
By Cartier
Located in San Diego, CA
Certification: GIA 6157849481 Metal: Platinum PT950 Size: 6.25 - SIZABLE Total Carat Weight: 1.59 TCW
Diamond, Platinum
Tiffany & Co Platinum Diamond Engagement Ring 0.77ct
By Tiffany & Co.
Located in SYDNEY, NSW
A Tiffany & Co Diamond Engagement Ring, made of 950 Platinum. Prong set with one Pear Brilliant Cut
Diamond, Platinum
Tiffany & Co. Modern 1999 Platinum Men's Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
High polished half dome band Fully signed 1999 Tiffany & Co. Stamped PT 950 for platinum Ring
Platinum
Sold|$6,797 / set
1.77 Carat Diamond and Platinum Stud Earrings
Located in Jesmond, Newcastle Upon Tyne
bear the platinum mark PT950. These impressive earrings are supplied with a European Diamond Report
Diamond, Platinum
75.00 Carat Aquamarine Diamond Halo Platinum Pendant Necklace
Located in Stamford, CT
grams Tested: Platinum Stamped: PT 950
Aquamarine, Diamond, Platinum
1.00 Carat Diamond Platinum Wedding Band Ring
Located in Stamford, CT
. .40cts Size 7.5 and sizable Platinum Stamped: PT950 6.3 grams Width at top: 4.1mm Height at top: 3.6mm
Diamond, Platinum
1999 Tiffany & Co. Platinum Unisex Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Wide band ring is designed with a rounded curvature With a brightly polished finish Stamped PT950
Platinum
Harry Winston Platinum Rounded Wedding Band Ring
By Harry Winston
Located in New York, NY
Winston Style: Wedding Band Hallmarks: H.W PT950 147893 Metal: Platinum Finger Size: 4 ( can be resized
Platinum
Harry Winston Platinum Rounded Wedding Band Ring
By Harry Winston
Located in New York, NY
Winston Style: Wedding Band Hallmarks: H.W PT950 147893 Metal: Platinum Finger Size: 4 ( can be resized
Platinum
Natural Royal Blue Sapphire Diamond Platinum Ring
Located in Stamford, CT
Tested: Platinum Stamped: PT 950 Hallmark: Unknown Hallmark
Diamond, Sapphire, Platinum
Tiffany & Co. Contemporary Platinum Men's Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
signed Tiffany & Co. Stamped PT950 for platinum Circa: 2000s Ring Size: 10 1/4 & sizable Measures
Platinum
Tiffany & Co Platinum Vintage Diamond Ring 0.50ct
By Tiffany & Co.
Located in SYDNEY, NSW
: Platinum PT950 Carat: 0.50ct Colour: N/A Clarity: N/A Cut: Marquise Shape Old Cut Weight: 4.43 grams
Diamond, Platinum
EGL Certified Art Deco Diamond Dangle Drop Platinum Earrings
Located in Stamford, CT
1.19 inches Width: 6.43mm or .25 inch Depth: 4.31mm 4.3 grams Tested: 950 Platinum Stamped: PT 950
Diamond, Platinum
Peter Suchy Blue Tanzanite Diamond Dangle Platinum Earrings
By Peter Suchy
Located in Stamford, CT
, approx. total weight 5.29cts, VS Platinum Tested: Platinum Stamped: Pt 950 Top to bottom: 15.87mm or .63
Diamond, Tanzanite, Platinum
GIA Certified 1.02 Diamond Platinum Solitaire Engagement Ring
Located in Stamford, CT
Platinum 2.6 grams Tested: Platinum Stamped: PT 950 Hallmark: JA Width at top: 6.3mm Height at top: 6.5mm
Diamond, White Diamond, Platinum
Tiffany & Co Platinum Diamond Solitaire Ring 0.58ct
By Tiffany & Co.
Located in SYDNEY, NSW
: Platinum PT950 Carat: 0.58ct Colour: I Clarity: VS2 Cut: Round Brilliant Cut Weight: 4 grams Engravings
Diamond, Platinum
9.39 Carat Natural Pear Aqua Diamond Dangle Platinum Earrings
Located in Stamford, CT
, VS2 950 Platinum Platinum Tested: 950 Platinum Stamped: Pt 950 Top to bottom: 33.72mm or 1.32 inches
Aquamarine, Diamond, Platinum
Tiffany & Co. Diamond Platinum Eternity Band Ring
By Tiffany & Co.
Located in Litchfield, CT
clarity square emerald diamonds HALLMARKS: Tiffany & Co., PT950 for platinum, ES STOCK NUMBER
White Diamond, Platinum
Sold|$1,895
.25 Carat Diamond Platinum Wedding Band Ring
Located in Stamford, CT
Platinum Stamped: PT950 Hallmark: Aira 2.2 grams Width at top: 1.95mm Height at top: 1.97mm Width at
Diamond, Platinum
Sold|$22,500
Platinum, Ruby, Diamond, and Onyx Ring
Located in Princeton, NJ
A platinum (PT950), diamond, and onyx cocktail ring centering a natural ruby of notable size. The
Diamond, Onyx, Ruby, Platinum
Tiffany & Co. Round Diamond 0.32Ctw Platinum Pendant Necklace
By Tiffany & Co.
Located in New York, NY
carats, accompanied by a cable link chain. It is crafted in Platinum (PT950), with a necklace length of
Diamond, Platinum
Tiffany & Co. Platinum Wedding Band Ring Knife Edge Design
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. Style: Wedding Band Ring Sku Number: 11452515 Metal: Platinum PT950 Width: 2 MM
Platinum
1999 Tiffany & Co. Platinum Men's Wedding Band Ring
By Tiffany & Co.
Located in Philadelphia, PA
Band ring is designed with a rounded curvature With a bright polish Stamped PT950 for Platinum
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.