3.62 Carat Oval Blue Sapphire and Diamond Halo Platinum Split Ring
Located in Miami, FL
grams Platinum 900 Size 6.25. Details: Item Type: Cocktail Ring Metal: Platinum 900 Size: 6.25
Diamond, Sapphire, Blue Sapphire, Platinum
5.03 Carat Natural Jade and Diamond Filigree Cathedral Platinum Ring
Located in Miami, FL
Type: Ring Metal: Platinum 900 Size: 6 Weight: 7.98 Grams Setting: Cathedral split band, Filigree
Diamond, Jade, Platinum
Antique Art Deco Green Emerald Center and Double Diamond Row Ring in Platinum
Located in Honolulu, HI
Item Specifications: Metal: Platinum 900 Ring Size: 5.75 (resizing available for a fee) Ring
Diamond, Emerald, Platinum
NEW Platinum 1.28ctw 5 VS F Diamond Stackable Bezel Set Band Ring
Located in Montclair, NJ
Clarity - 1.28ctw (exact) Material: Platinum .900+ Weight: 5.35 Grams Ring Size: 6.5 (fitted on finger
Diamond, Platinum
GIA Certified 6.82 Carat Pear Cut No Heat Blue Sapphire Drop Pendant Necklace
Located in Miami, FL
with no heat treatment, crowned by a delicate diamond flower top in platinum 900. Necklace length 18
Diamond, Sapphire, Platinum
Colombian Emerald Cabochon & Diamonds Pendant 18k Platinum Chain
By Emeralds Maravellous
Located in US
approximately 7.16 carats, expertly bezel set in 18k yellow gold and platinum 900. The design is further
Diamond, Emerald, 18k Gold, Yellow Gold, Platinum
Tiffany & Co. Pair of Platinum 1ctw Channel Set Diamond Band Stack Guard Rings
By Tiffany & Co.
Located in Montclair, NJ
-SI1 Clarity Total Carat Weight: 0.75-1.0 (approx.) Material: Solid Platinum .900+ Weight: 5.82 Grams
Diamond, Platinum
GRS 2.44 Carat Burma Vivid Pink Sapphire & Diamond Platinum Ballerina Ring
Located in Miami, FL
GRS-certified 2.44 carat oval vivid pink Burma sapphire and 0.86 carat diamond platinum 900
Diamond, Pink Sapphire, Platinum
Antique Platinum 0.55ctw Single Cut Diamond Eternity Stackable Band Ring Sz 5.5
Located in Montclair, NJ
White Color - 0.55ctw (approx.) Material: Solid Platinum .900+ Total Weight: 2.27 Grams Overall Width
Diamond, Platinum
Antique Art Deco Platinum Diamond Ring
Located in New York, NY
Old Cut Diamond Measurements: 25.2 x 20.75 x 13.55mm Size: 8 Hallmark: Platinum 900 Item #: BR-1707
Diamond, Platinum
Platinum Large Oval Blue Aquamarine w/ Diamond Accents 5.59ctw Ring
Located in Montclair, NJ
Brilliant White Diamonds - 0.14ctw (exact) Material: Platinum .900 Total Weight: 7.39 Grams Overall Width
Aquamarine, Diamond, Platinum
1.26 Carat Oval Ruby & Mixed Diamond Ballerina Platinum Art Nouveau Style Ring
Located in Miami, FL
1.26 carat oval ruby measuring 6.6 x 5.5mm is set in a platinum 900 Art Nouveau-inspired ballerina
Diamond, Ruby, Platinum
$18,840Sale Price|20% Off
Bora & Co GRS Certified 2.28ct Colombian Emerald and Diamond Platinum Ring
Located in New York, NY
Bora & Co GRS Certified 2.28ct Colombian Emerald and Diamond Platinum Ring A stunning display of
Diamond, Emerald, Platinum
Vintage Art Deco 2.08ct Diamond Platinum Round Engagement Ring Sz. 5.75
Located in Morris Plains, NJ
-visible inclusions typical of early 20th-century stones. Crafted in solid Platinum 900, the ring weighs
Diamond, Platinum
GIA Certified 8.45 Carat Black Opal & Diamond Halo Platinum Vintage Ring
Located in Miami, FL
GIA Certified Vintage 8.45 Carat Natural Black Opal & 0.70 Carat Diamond Halo in Platinum 900 Halo
Diamond, Opal, Platinum
$20,000Sale Price|20% Off
GIA Certified 34 Carat Platinum Aquamarine and Diamond Ring
Located in Chicago, IL
, excellent transparency, and exceptional presence. Set in Platinum 900, the aquamarine is elegantly accented
Aquamarine, Diamond, White Diamond, Platinum
$6,800Sale Price|20% Off
Bora & Co GIA Certified 1.42ct Tanzanian Spinel and Diamond Platinum Ring
Located in New York, NY
Platinum 900 with a total weight of 11.32 grams, this exquisite piece embodies timeless sophistication and
Diamond, Spinel, Platinum
$23,600Sale Price|20% Off
Bora & Co GIA Certified 1.77ct Brazilian Alexandrite and Diamond Platinum Ring
Located in New York, NY
. Crafted in Platinum 900 with a total weight of 9.5 grams, this exceptional ring embodies rarity, elegance
Alexandrite, Diamond, Platinum
Bora & Co AGL Certified 20.20ct Star Sapphire and Diamond Platinum Ring
Located in New York, NY
allure. Expertly crafted in Platinum 900 with a total weight of 17.33 grams, this exceptional piece
Diamond, Star Sapphire, Platinum
Bora & Co GIA Certified 10.10ct Pink Sapphire & Diamond Platinum Ring
Located in New York, NY
light. Expertly crafted in Platinum 900 with a total weight of 10.9 grams, this extraordinary piece
Platinum
Vintage Platinum Diamond and 1.3tcw Emerald Cluster Ring
Located in New York, NY
1.25tcw Measurements: 27.4 x 20.3 x 17mm Size: 6.5 Hallmark: Platinum 900 Item #: BR-1697-091825-20
Diamond, Emerald, Platinum
Antique Platinum 0.91ct L SI1 Diamond Engagement Ring GIA
Located in New York, NY
: Platinum 900 Item #: BR-1649-071025-12
Diamond, Platinum
Peter Suchy EGL Certified .77 Carat Diamond Sapphire Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
900 Tested: Platinum Stamped: PT 900 6.4 grams Width at top: 11.17mm Height at top: 7.33mm Width at
Blue Sapphire, Diamond, Sapphire, Platinum
Certified 4.17 Carat Untreated Jadeite Jade and Baguette Diamond Platinum Ring
Located in Miami, FL
: Platinum 900 Size: 6 (adjustable) Weight: 8.06 Grams Center Stone Details: Type: Natural Jadeite Jade
Diamond, Jade, Platinum
Vintage 1.00 Carat Center Marquise Diamond Ring W/Guard Platinum 14k White Gold
Located in Miami, FL
is a Marquise cut and is H/SI and is the ring is made of platinum 900. The guard ring features
Diamond, White Gold, Platinum
Vintage Platinum 0.55tcw G Vs1 Diamond Ring
Located in New York, NY
Measurements: 19.95 x 5.4 x 24mm Size: 8 Hallmark: Platinum 900 Item #: BR-1648-071025-17
Diamond, Platinum
1.54 Carat Round Cut Ruby and Diamond Double-Row Eternity Band Ring
Located in Miami, FL
1.54 carat ruby and 0.68 carat diamond total double band ring in platinum 900. Details: Item
Diamond, Ruby, Platinum
GRS Certificate 5.01 Ct Natural unheated Mogok Burma Ruby Red color with Ring
Located in bangkok, TH
diamond Round Brilliant D color VVS - 0.43ct 3-total weight : 6.64Gram Platinum 900 Certificate ：GRS
Diamond, Ruby, Platinum
Tiffany & Co. True Love Platinum w/ 18k Gold 0.22ct Round Diamond Solitaire Ring
By Tiffany & Co.
Located in Montclair, NJ
- 0.22ct (exact) Material: Solid Platinum .900+ & 18k Yellow Gold Top Weight: 9.6 Grams Ring Size: 5.0
Diamond, Gold, 18k Gold, Yellow Gold, Platinum
GIA Certified 16.70 Carat Aquamarine and Diamond Vintage Cocktail Ring
Located in Miami, FL
weight of round-cut diamond vintage platinum 900 cocktail ring. Ring size 7, adjustable. Details: Item
Aquamarine, Diamond, Platinum
3.10 Carat Blue Sapphire and Diamond with Filigree Split Shank Band Ring
Located in Miami, FL
Natural 3.10 Carat Blue Oval-Cut Sapphire with 0.16 CTTW Round-Cut Diamonds in Platinum 900 Size 6
Diamond, Blue Sapphire, Platinum
Certified 15 Carat Jadeite Jade A Fei Cui and Diamond Split Platinum Ring
Located in Miami, FL
Ring. Details: Item Type: Statement Ring Metal: Platinum 900 Size: 7 (adjustable) Weight: 8.80 Grams
Diamond, Jade, Platinum
Antique Platinum 0.68ctw Old European Cut Diamond Solitaire Engagement Ring
Located in Montclair, NJ
Color - 0.12ctw (approx.) Total Carat Weight: 0.68 (approx.) Material: Solid Platinum .900+ Weight
Diamond, Platinum
Brilliant Cut Diamond Emerald Halo Baguette Ballerina Ring in Platinum
Located in Honolulu, HI
Ring Specifications: Metal: Platinum 900 Ring Size: 6.5 Ring Height: 19 mm tall Ring Weight
Diamond, Emerald, Platinum
Emeralds Maravellous Vintage Colombian Emerald Diamond Engagement Platinum Ring
By Emeralds Maravellous
Located in US
center surround by baguette diamonds 0.81 carat. Composition: Platinum 900 Primary Stones: Natural Fine
Diamond, White Diamond, Emerald, Platinum
GIA Certified 8.69 Carat Cabochon Black Opal & Diamond in Platinum Cocktail Ring
Located in Miami, FL
weight baguette diamond ballerina halo in platinum 900 cocktail ring. Ring Size 7.25, adjustable
Diamond, Black Opal, Platinum
2 Carat Asscher Cut Emerald & Diamond Checkerboard Statement Ring
Located in Miami, FL
. Set in platinum 900. Details: Item Type: Statement Ring Metal: Platinum 900 Size: 7 (adjustable
Diamond, Emerald, Platinum
$71,680Sale Price|20% Off
Bora & Co GIA 21.25ct Sri Lanka Blue Sapphire and Diamond Platinum Ring
Located in New York, NY
radiant contrast to the centerpiece. Expertly set in Platinum 900, with a total weight of 16.1 grams
Diamond, Blue Sapphire, Platinum
5.87 Carat Grade A Jadeite Jade and Diamond Platinum 3 Stone Ring
Located in Miami, FL
. Details: Item Type: Ring Metal: Platinum 900 Size: 7 1/4 Weight: 7.43 Grams Setting: Cathedral, Filigree
Diamond, Jade, Platinum
2.03ctw Baguette Ruby and Diamond Abstract Design Band Heavy Platinum 8.3g V1138
Located in Osprey, FL
: Platinum 900, 8.3g ♥ Gemstone: Ruby 1.44ct, Diamond 0.59ct ♥ Note: This is a preowned piece that may have
Diamond, Ruby, Platinum
Vintage Platinum 1.15ct B4 Black Crystal Opal and Diamond Statement Ring
Located in New York, NY
, Diamond 0.79tcw Measurements: 28 x 19.7 x 17.85mm Size: 6 Hallmark: Platinum 900 Item #: BR-1705-092524
Diamond, Black Opal, Platinum
$23,840Sale Price|20% Off
2.41 Carat Baguette and Round Diamond Platinum Wide Engagement Band Ring
Located in Chicago, IL
engagement band crafted in Platinum 900, featuring an elegant and substantial wide-band design set
Diamond, White Diamond, Platinum
GIA 4.43 Carat Oval G/I1 Diamond & Cabochon Ruby Platinum Vintage Ring
Located in Miami, FL
platinum 900 wide dome ring featuring two rows of channel-set cabochon rubies flanking a central round
Diamond, Ruby, Platinum
1 Carat Fancy Brown Diamond Vintage Art Deco Platinum Ring
Located in Miami, FL
Antique Art Deco platinum ring with natural brown Diamond center stone. Ring setting is an original
Brown Diamond, Platinum
12mm Cultured South Sea Pearl & Round Diamond Ring in Platinum
Located in Miami, FL
, Size 6.25. Item Details: - Item Type: Ring - Gemstones: Pearl; Diamonds - Metal: Platinum 900 - Weight
Diamond, Pearl, White Diamond, Platinum
Solid Platinum 3.19ctw Fine Sharp Star Sapphire w/ Diamond Open Sides Ring
Located in Montclair, NJ
(exact) Material: Solid Platinum .900+ (tested) - Stamped PT950 Weight: 7.56 Grams Ring Size: 6.0
Diamond, Sapphire, Platinum
EGL Certified 1.03 Carat Round Cut Diamond Platinum Split-Shank Solitaire Ring
Located in Miami, FL
Split-Shank Solitaire Ring. Details: Item Type: Split-Shank Solitaire Ring Metal: Platinum 900 Size
Diamond, Platinum
Bora & Co CGL Certified 7.03 Pink Sapphire and Diamond Platinum Ring
Located in New York, NY
Bora & Co CGL Certified 7.03ct Pink Sapphire and Diamond Platinum Ring A captivating fusion of
Diamond, Pink Sapphire
$32,000Sale Price|20% Off
15.75 Carat 1920's Elegant Platinum Diamond Ribbon Brooch
Located in Chicago, IL
Striking ribbon-style brooch finely crafted in Platinum 900 and set with approximately 15.75 carats
Diamond, White Diamond, Platinum
EGL Certified 1.03 Carat Round Cut Diamond Platinum Split-Shank Solitaire Ring
Located in Miami, FL
Split-Shank Solitaire Ring. Details: Item Type: Split-Shank Solitaire Ring Metal: Platinum 900 Size
Diamond, Platinum
EGL Certified 1.03 Carat Round Cut Diamond Platinum Split-Shank Solitaire Ring
Located in Miami, FL
Split-Shank Solitaire Ring. Details: Item Type: Split-Shank Solitaire Ring Metal: Platinum 900 Size
Diamond, Platinum
GIA Certified 2.47 Carat Royal Ceylon Blue Sapphire & Diamond Platinum Ring
Located in Miami, FL
Vintage Art Deco sapphire and diamond engagement ring, set in platinum 900. A ring face with 6
Diamond, Blue Sapphire, Platinum
Vintage 13.50 Carat GIA Purplish-Pink Tourmaline and Diamond 18K & Platinum Ring
By Gad & Co.
Located in Miami, FL
18K yellow gold and Platinum ring, weighing 16.28 grams, featuring a GIA Certified 13.50-carat
Diamond, Tourmaline, 18k Gold, Platinum
Contemporary Platinum Engagement Ring, 1.56ct GIA Diamond
Located in Lisboa, PT
modern elegance. Handcrafted in platinum (900‰ purity), this exceptional piece features a natural
Diamond, Platinum
Vintage 1.85 Carat Marquise Cut Diamond Cocktail Platinum East-West Ring
Located in Miami, FL
Vintage marquise cut natural diamond cluster east-west set cocktail ring in platinum 900. Set with
Diamond, Platinum
5.46 Ct GRS GIA Two Certificate Natural unheated Burma Mogok Ruby Red color
Located in bangkok, TH
stone: Natural diamond D-0.93ct/16P 3-total weight : 7.43Gram Platinum 900 Certificate ：GRS2025
Ruby
$15,840Sale Price|20% Off
GIA Certified 7cts Ceylon Blue Sapphire with Diamond Ring Set in Platinum
Located in Bangkok, TH
Ceylon Blue Sapphire 7.56 carats with Diamond 0.86 carat Ring set in Platinum 900 Settings (GIA
Diamond, Blue 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.
Ancient Egyptians referred to the vibrant stone as the “gem of the sun.”
There are many ways to showcase a diamond, from traditional prongs to a smooth, streamlined bezel. Here’s everything you need to consider.
The vintage bombé ring is bursting with color and timeless style.
Zircon is a magnificent and underrated natural gemstone that has been worn and adored for centuries.
Givers of fine gems enjoy surprise more than receivers, and women more than men. Find out what else our survey of 3,000 Americans revealed.
If diamonds don’t seem right, what about a magnificent sapphire, ruby or emerald?
Accounting for just 1 percent of all diamonds, these marvels of nature are exceedingly rare and gorgeously complex.
Learn about these antique jewelry styles, then choose a design that speaks to you.