Tiffany & Co. Round Brilliant Platinum Engagement Ring GIA Certified 0.77 Carat
By Tiffany & Co.
Located in Los Angeles, CA
Tiffany & Co. Style: Solitaire Metal: Platinum PT950 Size: 6.5 - sizable Total Carat Weight
Diamond, Platinum
Antique 18ct Gold Platinum Diamond Trilogy Bypass Engagement Ring
Located in Camelford, GB
Gold with 950/1000 Platinum Pt Mount This ring has a good shank hence ideal if resizing needed Style
Diamond, Gold, 18k Gold, Platinum
Unavailable|$480
Vintage 18ct Gold Platinum Diamond Trilogy Engagement Ring 750
Located in Camelford, GB
950/1000 Platinum Pt Mount This ring has a good thick shank hence ideal if resizing needed Style
Diamond, Gold, 18k Gold, Platinum
Antique 18ct Gold Platinum Sapphire Diamond Cluster Engagement Ring
Located in Camelford, GB
Yellow Gold with 950/1000 Platinum Pt Mount This ring has a thick and sturdy shank hence ideal if
Diamond, Sapphire, Gold, 18k Gold, Yellow Gold, Platinum
Tiffany & Co. Platinum Diamond .83 Carat Round Ring E VS1 Triple Excellent
By Tiffany & Co.
Located in Middletown, DE
WEIGHT IS 1.10 cts. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it
Diamond, Platinum
Unavailable|$5,998
Tiffany & Co. Cushion Cut Platinum and Diamond Engagement Ring .83 Carat
By Tiffany & Co.
Located in Middletown, DE
platinum setting. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a
Diamond, White Diamond, Platinum
Vintage Platinum Diamond Solitaire Engagement Ring Size J1/2 5.25 950 Purity
Located in Camelford, GB
DETAILS Material: 950/1000 Platinum Pt Style: Classic Solitaire Diamond Engagement Ring Gems: Round cut
Diamond, Platinum
Vintage Platinum Diamond Solitaire Engagement Ring Size J1/2 5.25 950 Purity
Located in Camelford, GB
A very special item: 950 PLATINUM AND DIAMOND SOLITAIRE ENGAGEMENT RING DETAILS Material: 950/1000
Diamond, Platinum
Tiffany & Co. Gorgeous 1.50 Carats Diamonds Platinum Large Double Heart Necklace
By Tiffany & Co.
Located in Scottsdale, AZ
inches in width. This piece is hallmarked appropriately with "PT950" for 95% Purity in Platinum, as well
Diamond, White Diamond, Platinum
Antique Platinum Diamond Cluster Engagement Ring 950 Purity c1920s Size N1/2 7
Located in Camelford, GB
PLATINUM AND DIAMOND CLUSTER ENGAGEMENT RING DETAILS Material: 950/1000 Platinum Pt This ring has a sturdy
Diamond, Platinum
Antique 18ct Gold Platinum Tourmaline Diamond Cluster Engagement Ring Size P
Located in Camelford, GB
ENGAGEMENT RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a
Diamond, Tourmaline, Gold, 18k Gold, Yellow Gold, Platinum
Art Deco Opal Diamond Pendant Necklace 18ct Gold Platinum 15ct Opal circa 1930
Located in Lancaster , GB
: Art Deco, Circa 1930 ORIGIN: Edinburgh, United Kingdom MARKS: PT 950 stamp (Platinum) CONDITION
Diamond, Opal, 18k Gold, Platinum
Unavailable|$1,029
Antique 18ct Gold Platinum Diamond Cluster Gypsy Ring 750 950 Purity
Located in Camelford, GB
950 Platinum Pt Mount This ring has a sturdy shank hence ideal if resizing needed Style: Classic
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
Vintage 18ct Gold Platinum Diamond Solitaire Engagement Ring Size O1/2 7.5 750
Located in Camelford, GB
ENGAGEMENT RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a
Diamond, Gold, Platinum
Antique 18ct Gold Platinum Diamond Solitaire Engagement Ring Size N 6.75 750 950
Located in Camelford, GB
ENGAGEMENT RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a
Diamond, Gold, Platinum
Antique 18ct Gold Platinum Diamond Trilogy Bypass Engagement Ring Size U 10.25
Located in Camelford, GB
Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a good shank hence ideal
Diamond, Gold, 18k Gold, Platinum
Antique 18ct Gold Platinum Diamond Trilogy Engagement Ring Size L1/2 6.25 750
Located in Camelford, GB
ENGAGEMENT RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a
Diamond, Gold, 18k Gold, Platinum
Antique 18ct Gold Platinum Diamond Trilogy Engagement Ring Size N 6.75 750 950
Located in Camelford, GB
RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a thick
Diamond, Gold, Platinum, 18k Gold
Antique 18ct Gold Platinum Diamond Trilogy Engagement Ring Size L 5.75 750 950
Located in Camelford, GB
TRILOGY ENGAGEMENT RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This
Diamond, Gold, 18k Gold, Platinum
Antique 18ct Gold Platinum Diamond Trilogy Engagement Ring Size L 6 750 950
Located in Camelford, GB
Gold with 950/1000 Platinum Pt Mount This ring has a good thick shank hence ideal if resizing needed
Diamond, Gold, 18k Gold, Platinum
Antique 18ct Gold Platinum Diamond Trilogy Bypass Engagement Ring 750 950 Size L
Located in Camelford, GB
Gold with 950/1000 Platinum Pt Mount This ring has a good thick shank hence ideal if resizing needed
Diamond, Gold, 18k Gold, Platinum
Antique 18ct Gold Platinum Diamond Solitaire Engagement Ring Size K 5.5 750 950
Located in Camelford, GB
ENGAGEMENT RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a
Diamond, Gold, Platinum, 18k Gold, Yellow Gold
Vintage 18ct Gold Platinum Diamond Solitaire Engagement Ring 750 Size I 1/2 4.5
Located in Camelford, GB
ENGAGEMENT RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a
Diamond, Gold, Platinum
Antique 18ct Gold Platinum Diamond Twist Engagement Ring Size L 5.75 750 950
Located in Camelford, GB
RING DETAILS Material: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Collar Mount This ring has a
Diamond, Gold, Platinum, 18k Gold, Yellow Gold
Antique 18ct Gold Platinum Diamond Eternity Bypass Engagement Ring Size O 1/2 7
Located in Camelford, GB
Gold with 950/1000 Platinum Pt Mount This ring has a good shank hence ideal if resizing needed Style
Diamond, Gold, 18k Gold, Platinum
Unavailable|$2,058
Three-Stone 0.98 Carat Diamond Platinum Ring
Located in Worcester, Worcestershire
plain polished "D" shaped cross sectioned white shank. No hallmark, stamped PT950, testing as platinum
Gold
Antique 18ct Gold Platinum Diamond Trilogy Engagement Ring 750 950 Size O 1/2
Located in Camelford, GB
: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a good thick shank hence ideal
Diamond, Gold, 18k Gold, Platinum
Antique 18ct Gold Platinum Diamond Bypass Engagement Ring 750 950 Size L 1/2 6
Located in Camelford, GB
with 950/1000 Platinum Pt Mount This ring has a sturdy shank hence ideal if resizing needed Style
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
Unavailable|$25,999
18K White Gold Diamond Emerald Tanzanite Pink Sapphire GIA Earrings Earclips
Located in New York, NY
, further accented by round and baguette diamonds. Stamped PT 950 for platinum and OR 750 for 18 karat gold.
White Gold
Bargain Vintage 9ct White Gold Pink Sapphire and Diamond Paste Trilogy Ring
Located in Camelford, GB
: 18ct 750/000 Yellow Gold with 950/1000 Platinum Pt Mount This ring has a good thick shank hence ideal
Diamond, Pink Sapphire, Zircon, Gold, 9k Gold, White Gold
Unavailable|$2,995
Tiffany & Co. Platinum and Diamond Flower Ring .60 Carat
By Tiffany & Co.
Located in Middletown, DE
platinum flower design The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it
Diamond, Platinum
Unavailable|$10,995
Tiffany & Co. 1.51 Carat Platinum and Diamond Stud Earrings G VS1
By Tiffany & Co.
Located in Middletown, DE
Tiffany screw backs that are properly hallmarked with the Tiffany logo and PT 950 for platinum. The
Diamond, Platinum
Unavailable|$5,975
Tiffany & Co. Platinum Diamond .80 Carat Round Engagement Ring H VS2
By Tiffany & Co.
Located in Middletown, DE
logo and PT 950 indicating it is a platinum setting. The diamond is properly laser inscribed with the
Diamond, Platinum
Unavailable|$6,495
Tiffany & Co. Platinum Pave Diamond Wedding Band Ring with Papers 2019
By Tiffany & Co.
Located in Middletown, DE
and PT 950 for platinum. The ring weighs 3.4 grams. The purchase includes the Tiffany & Co suede
Diamond, Platinum
Unavailable|$12,995
Tiffany & Co. Platinum Diamond 1.24 Carat Round Engagement Ring H VVS2
By Tiffany & Co.
Located in Middletown, DE
properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a platinum setting. The diamond
Diamond, Platinum
Tiffany & Co. Platinum Diamond Soleste Engagement Ring .43 Total Carat Weight
By Tiffany & Co.
Located in Middletown, DE
Tiffany Platinum setting. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating
Diamond, Platinum
Unavailable|$4,850
Tiffany & Co. Platinum Diamond .78 Carat Round Engagement Ring I VVS1
By Tiffany & Co.
Located in Middletown, DE
properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a platinum setting and the ring
Diamond, Platinum
Tiffany & Co. Platinum 5-Row Diamond Etoile Wedding Band Ring with Papers
By Tiffany & Co.
Located in Middletown, DE
professionally cleaned and polished to new. The ring is properly hallmarked with the Tiffany & Co logo and PT 950
Diamond, Platinum
Tiffany & Co. Platinum Diamond Split Shank Engagement Ring .76 Carat G VS1
By Tiffany & Co.
Located in Middletown, DE
CARAT WEIGHT IS .85 cts. The ring is properly hallmarked with the Tiffany & Co logo and PT 950
Diamond, Platinum
Unavailable|$9,995
Tiffany & Co. Platinum and Diamond Princess Cut Ring 1.13 Carat F VS1
By Tiffany & Co.
Located in Middletown, DE
. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a platinum
Diamond, White Diamond, Platinum
Tiffany & Co. Platinum Diamond .60 Carat H VS1 Triple Exc Round Engagement Ring
By Tiffany & Co.
Located in Middletown, DE
WEIGHT IS .82 cts. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is
Diamond, Platinum
Tiffany & Co. Platinum Diamond 1.47 Carat Round Engagement Ring G VVS2 Triple Ex
By Tiffany & Co.
Located in Middletown, DE
ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a platinum setting
Diamond, Platinum
Tiffany & Co. Platinum Diamond .92 Carat Round Ring G VVS2 Triple Excellent Cut
By Tiffany & Co.
Located in Middletown, DE
Platinum setting. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a
Diamond, Platinum
Tiffany & Co. Platinum Diamond .91 Carat Round Ring H VVS1 Triple Excellent Cut
By Tiffany & Co.
Located in Middletown, DE
Platinum setting. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a
Diamond, Platinum
Tiffany & Co. Platinum Diamond .77 Carat Round Ring F VS2 Triple Excellent Cut
By Tiffany & Co.
Located in Middletown, DE
ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a platinum setting
Diamond, Platinum
Harry Winston Platinum and Diamond Cluster Earrings 1.91 Carat F VS1 Box Papers
By Harry Winston
Located in Middletown, DE
PT950 indicating they are platinum. In addition the earrings have the most secure snap locks. The
Diamond, Platinum
Unavailable|$10,998
Tiffany & Co. Platinum Diamond 1.13 Carat Round Engagement Ring I VVS1
By Tiffany & Co.
Located in Middletown, DE
. The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a platinum
Diamond, Platinum
Unavailable|$9,995
Tiffany & Co. 3-Stone Round and Pear Diamond Engagement Ring F VS1
By Tiffany & Co.
Located in Middletown, DE
& Co logo and PT 950 for platinum and also has the serial number and .92 center diamond tcw. In
Diamond, Platinum
Tiffany & Co. Platinum Diamond .60 Carat Round Ring H VVS2 Triple Excellent Cut
By Tiffany & Co.
Located in Middletown, DE
properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a platinum setting. In addition
Diamond, Platinum
Tiffany & Co. Platinum Diamond .90 Carat Round Ring H VS1 Triple Exc 2017 Model
By Tiffany & Co.
Located in Middletown, DE
inquire). The ring is properly hallmarked with the Tiffany & Co logo and PT 950 indicating it is a
Diamond, Platinum
Tiffany & Co. Platinum and Diamond Princess Cut Engagement Ring .81 Carat H VS1
By Tiffany & Co.
Located in Middletown, DE
Tiffany & Co logo and PT 950 indicating it is a platinum setting. The diamond is properly laser inscribed
Diamond, White Diamond, Platinum
Sold|$9,800
1.30CT Ruby & Diamond Ring in PT950 Platinum
Located in Bucharest, Romania
Unheated ruby and diamond cluster ring crafted in luxurious PT950 platinum, showcasing a striking
Diamond, Ruby, Platinum
Pear Shape Emerald and Diamonds PT950 Platinum Engagement Ring
Located in Hicksville, NY
Basic Info 950 Platinum Engagement Ring with Center Pear Shape Emerald Stone & Side Diamond
Diamond, Emerald, Platinum
New Design Platinum Cocktail Bow Ring with Ruby & Sapphire
Located in Bucharest, Romania
PT950 platinum bow cocktail ring featuring a natural, unheated ruby weighing approximately 1.10
Ruby, Sapphire, Platinum
Sold|$9,900
Harry Winston Diamond Platinum Cross
By Harry Winston
Located in New York, NY
PT950 Platinum In its original box and with authenticity papers. Retails for $12.900.
Diamond, Platinum
GIA De Beers 0.22ct Diamond Platinum Stud Earrings
By De Beers
Located in Guangzhou, CN
high-quality Pt950 platinum. Known for their exceptional fire and brilliance, these De Beers diamonds
Platinum Engagement Ring with Natural Diamonds pt950
Located in București, București
A symbol of enduring love and refined beauty, this PT950 platinum engagement ring is a masterpiece
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.