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Bypass Platinum Estate 3 Carat Diamond Ring
Located in New York, NY
Estate Bypass Platinum 3 carat Diamond Ring. Crafted with two main diamonds of 1.20cttw, plus all
Category

20th Century American Modern Fashion Rings

Materials

Diamond, Platinum

1.38 Carats Diamonds Platinum Filigree 3-Stone Ring
Located in San Francisco, CA
3 round brilliant cut diamonds totaling 1.38 carats set in a filigree design platinum ring detailed
Category

2010s American Art Deco More Rings

Materials

Diamond, Platinum

Natural 3 Carat Burma Ruby Diamond Platinum Ring
Located in Beverly Hills, CA
colorless round cut diamonds. Hand crafted in platinum. Ring size 7-3/4 and may be resized.
Category

21st Century and Contemporary Unknown Modern More Rings

Materials

Diamond, Ruby, Platinum

Natural 3 Carat Burma Ruby Diamond Platinum Ring
Located in Beverly Hills, CA
colorless round cut diamonds. Hand crafted in platinum. Ring size 7-3/4 and may be resized.
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

Diamond, Ruby, Platinum

3 Carat Solitaire Platinum Diamond Ring, circa 1950
Located in Miami, FL
An Engagement ring featuring a 3.34 carats solitaire diamond with incredible fire set in Platinum
Category

Vintage 1950s Unknown Engagement Rings

Materials

Diamond, Platinum

GIA 5.67 Carat Oval Diamond 3-Stone Engagement Platinum Ring
Located in New York, NY
A Breathtaking Estate HANDMADE PLATINUM (stamped) Oval Diamond Three-Stone Engagement ring. The
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

3 Carat GIA Cert Diamond Platinum Engagement Ring
Located in Miami, FL
Gorgeous 3ct cushion cut diamond F color and SI1 clarity set in to a custom made platinum ring with
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, White Diamond, Platinum

3 Carat Round Diamond Platinum Eternity Band Wedding Ring
Located in Baltimore, MD
3 Carat Round Diamond Platinum Eternity Wedding Band Ring Size 6.5 Metal: Platinum Weight: 4.49
Category

21st Century and Contemporary Contemporary Band Rings

Materials

Diamond, Platinum

3 Carat Kashmir Sapphire Diamond Platinum Three Stone Engagement Ring
Located in New York, NY
weighing a total of 2.17 carats (H-VS2), set in Platinum. The sapphire measures 6.44 x 5.89 x 6.99 mm and
Category

20th Century American Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 9.93 Carat 3/4s Oval Platinum Diamond Eternity Ring
By Sebastian Bernard
Located in Los Angeles, CA
This beautiful Eternity Ring is made of Platinum showcasing 14 perfectly matched GIA Certified (E-F
Category

2010s American Wedding Rings

Materials

Diamond, Platinum

4.29 Carat Estate Vintage Marquise Diamond 3-Stone Wedding Platinum Ring
Located in New York, NY
A Breathtaking Estate HANDMADE PLATINUM (stamped) Marquise Diamond Three-Stone Engagement ring. The
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

GIA 3.43 Carat Cushion Diamond 3-Stone Engagement Wedding Platinum Ring
Located in New York, NY
A Breathtaking vintage HANDMADE PLATINUM (stamped) Cushion Diamond Three-Stone Engagement ring. The
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

Modern 3 Carat Solitaire Baguette Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
. This gorgeous platinum engagement ring features a modern 3.89 carat round brilliant cut diamond that
Category

Early 2000s Unknown Modern Engagement Rings

Materials

Diamond, Platinum

Art Deco 3 Carat Sapphire and Diamond Platinum Filigree Ring
Located in Montgomery, AL
carats. The platinum setting features one diamond north and south of the center sapphire. These two
Category

Early 20th Century Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

French 19th Century 3 Carat Diamond Platinum Daisy Ring
Located in Poitiers, FR
Platinum ring. This delightful antique Daisy style ring has a claw set oval antique diamond
Category

Antique 1870s French Engagement Rings

Materials

Diamond, White Diamond, Platinum

Platinum 3 Stone Emerald Cut 2.25 Carats Diamonds Ring
Located in Miami, FL
Offered here is an elegant three stones ring, handmade in noble 950 platinum. Centered with a 1.01
Category

2010s North American Contemporary Engagement Rings

Materials

Diamond, Platinum

Platinum 3 Stone Emerald Cut 2.25 Carats Diamonds Ring
Located in Miami, FL
Offered here is an elegant three stones ring, handmade in noble 950 platinum. Centered with a 1.01
Category

2010s North American Contemporary Engagement Rings

Materials

Diamond, Platinum

French 3, 06 Carat Tsavorite Garnet Diamonds Platinum Ring
Located in Poitiers, FR
Ring in platinum, dog head hallmark. This modern platinum ring is set with 4 claws on its top, with
Category

21st Century and Contemporary French Modern Engagement Rings

Materials

Diamond, White Diamond, Garnet, Tsavorite, Platinum

Platinum 3 Carat Diamond Convertible Ring to Pendant, circa 1950s
Located in Cape May, NJ
, Ring-Dant, R with Circle surrounding it, 5032 Primary Stone: Diamond Carat Weight: .98 CT Color: F
Category

Vintage 1950s Retro Cluster Rings

Materials

Diamond, Platinum

GIA 6.01 Carat Estate Vintage Pear Diamond 3-Stone Wedding Platinum Ring
Located in New York, NY
) Engagement Ring with GIA Certified Pear Shaped Center Diamond in Shy 5.5 carats (5.42ct) K color VVS2 clarity
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

GIA 3.65 Carat Vintage Asscher Diamond 3-Stone Engagement Wedding Platinum Ring
Located in New York, NY
A Breathtaking Estate HANDMADE PLATINUM (stamped) Diamond Three-Stone Engagement ring dazzles GIA
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

1990s Platinum Baguette Cut Diamond 3 Carat Eternity Band Ring
Located in Montgomery, AL
Platinum White Baguette Cut Diamond Eternity Band Ring Size 5 5.0 Grams Baguette Cut White Diamonds
Category

1990s Band Rings

Materials

Diamond, Platinum

Vintage Platinum Baguette Cut Diamond Eternity Band 3 Carat Ring
Located in Montgomery, AL
Platinum Baguette Cut Diamond Eternity Band Baguette Cut White Diamonds Size 5.25 3 Carats Total
Category

1990s Unknown Band Rings

Materials

Diamond, Platinum

GIA 6.35 Carat Vintage Princess Diamond 3-Stone Engagement Wedding Platinum Ring
Located in New York, NY
A Breathtaking Estate HANDMADE PLATINUM (stamped) Princess cut Diamond Three-Stone Engagement ring
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

3 Carat Natural Brazil Alexandrite and Diamond Three-Stone Platinum Ring
Located in New York, NY
A beautiful oval shape, mixed-cut Brazilian Alexandrite, weighing over three carats, set with two
Category

Late 20th Century American Engagement Rings

Materials

Alexandrite, White Diamond, Platinum

1940 Missiaglia Venezia 3 Carats Diamond and Platinum Bow Ring
By Missiaglia 1846
Located in Napoli, NA
: Pre-owned - Excellent METAL: Platinum GEM STONE: Diamonds 3.10 total carats DESIGN ERA: 1940 RING SIZE
Category

Mid-20th Century Italian Cocktail Rings

Materials

Diamond, Platinum

GIA 3.51 Carat E Vs1 Emerald Cut 3 Diamonds Ring Platinum
Located in Miami, FL
Offered here is a gorgeous three ( 3 ) diamond ring engagement ring set in platinum. All three ( 3
Category

2010s Three-Stone Rings

Materials

Diamond, Platinum

22 Carat Emerald 3 Carat Diamonds Ring Pendant Brooch Transformer Platinum, 1945
Located in Herzelia, Tel Aviv
Ring transformer to Pendant or Brooch in Platinum with 22 Ct Cabochon Emerald and 17 round-cut
Category

Mid-20th Century Cocktail Rings

Materials

Diamond, Emerald, Platinum

Art Deco 3-Stone 2.55 Carats Diamonds Platinum Filigree Ring
Located in Narberth, PA
A lovely 3-stone diamond ring from the Art Deco (ca1920) era! This beautiful piece has three
Category

Vintage 1920s Art Deco Three-Stone Rings

Materials

Diamond, Platinum

1950s 1.00 Carat Diamond and Platinum Full Eternity Ring- Size 6 3/4
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive vintage 1.00 carat diamond and platinum full eternity ring; part of our
Category

Vintage 1950s Engagement Rings

Materials

Diamond, Platinum

Vintage .25 Carat Platinum Retro 3-Stone Diamond Engagement Ring
Located in Addison, TX
. This ring can be sized up or down 3 sizes for an additional $30. If you wish to have a ring sized
Category

Mid-20th Century Post-War Bridal Rings

Materials

Diamond, Platinum

GIA Certified 4.51 Carat total weight 3-Stone Diamond Halo Ring in Platinum
Located in Palm Beach, FL
GIA Certified 4.51 Carat (total weight) Diamond Three-Stone Halo Ring in Platinum. Center stone is
Category

20th Century Engagement Rings

Materials

Diamond, Platinum

Platinum 3 Stones Round Diamond Engagement Ring
By Manfredi
Located in Greenwich, CT
This classic three stone engagement ring features an amazing GIA Certified 2.00 carats Round
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

Contemporary 4.13 Carat Emerald Cut Diamond Platinum 3 Stone Engagement Ring
Located in Narberth, PA
An exquisite Estate diamond engagement ring! Made of platinum, this gorgeous piece features a
Category

21st Century and Contemporary Contemporary Three-Stone Rings

Materials

Diamond, Platinum

Platinum Diamond Eternity Wedding Band Round Brilliant 2/3 Carat Ring
Located in Greensboro, NC
ring is a size 4 1/2 - 4 3/4. Metal Content: Guaranteed Platinum as tested Stone Information
Category

20th Century Unknown Wedding Rings

Materials

Diamond, Platinum

1.24 Carat Colombian Emerald Diamond Platinum 3-Stone Ring, GIA Certified
Located in Beverly Hills, CA
A classic 3-stone ring with a fine Colombian emerald as the center stone. It weighs 1.24 carats and
Category

21st Century and Contemporary American Fashion Rings

Materials

Diamond, Emerald, Platinum

2.81 Carat Emerald Cut Diamond Platinum 3 Stone Engagement Ring GIA
Located in Philadelphia, PA
Plat for platinum Ring Size: 5 3/4 & sizable Measures: 9.2 mm wide and sits 6.5 mm high Total weight
Category

Late 20th Century Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Cert 3 Carat Ruby Heart-Shaped Diamond Platinum Engagement Ring
Located in Carmel-by-the-Sea, CA
For the romantic, we offer the ideal gift to bestow upon your beloved. The center set with a 3
Category

21st Century and Contemporary Engagement Rings

Materials

Ruby, White Diamond, 18k Gold, Platinum

2.0 Total Carat Round Trilliant Diamond Platinum 3-Stone Engagement Ring
By Bracken Jewelers
Located in Santa Monica, CA
A modern twist on a classic design, this 3-stone platinum engagement ring features a 1.50ct round
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

6.69 Carat Emerald and Diamond GIA 3-Stone Platinum Ring Estate Fine Jewelry
Located in Montreal, QC
Beautiful Finely detailed Platinum Three-Stone Emerald Ring, center securely nestled with a Emerald
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, Platinum

2.20 Carat Cornflower Blue Sapphire, Diamond Platinum 3-Stone Engagement Ring
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This lovely 3-stone ring features a very special cornflower blue sapphire and beautiful white
Category

21st Century and Contemporary American Artisan Engagement Rings

Materials

Diamond, Blue Sapphire, Sapphire, Platinum

3 Carat of Diamonds Platinum Cluster Band
Located in Miami, FL
Unique diamond band crafted in 950 platinum features approximately three carats of mixed cut
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, White Diamond, Platinum

Peter Suchy Diamond Platinum Eternity 3 Row Band Ring
By Peter Suchy
Located in Stamford, CT
Solid and secure Platinum base set with pairs of 2.5mm diamonds separated by 3.2mm round diamonds
Category

2010s Band Rings

Materials

Diamond, Platinum

GIA 5.04 Carat Natural No-Heat Blue Sapphire and Diamond Platinum 3-Stone Ring
Located in New York, NY
SUPER fine Estate Ring features a Gorgeous gem : 4.28 carat Natural Oval shaped Bright Blue Sapphire
Category

2010s Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

Art Deco Platinum 1/2 Carat 3-Stone Diamond Ring, circa 1920s
Located in Cape May, NJ
Era: Art Deco c.1920's Hallmarks: PLATINUM Composition: Platinum Primary Stone: 3 Old European
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

White Platinum Green Jade Gemstone and 1 3/8 Carat Diamond Cocktail Ring
Located in New York, NY
This white platinum diamond and gemstone cocktail ring is certain to make a statement with its bold
Category

21st Century and Contemporary Indian Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Jade, Platinum

GIA 2.38 Carat Pear Shaped and Baguettes 3-Stone Diamond Platinum Ring
Located in New York, NY
Diamond 3 Stone Ring with GIA 2.38 Carat Pear Shaped and Baguettes in Platinum. This an exquisite
Category

Vintage 1960s Engagement Rings

Materials

Diamond, Platinum

3 Carat Australian Black Opal Diamond Platinum Cocktail Ring Estate Fine Jewelry
Located in Montreal, QC
Diamonds, weighing approx. 0.60 total Carat weight. Hand crafted in Platinum. Size 7, we offer ring
Category

Vintage 1960s Art Deco Cocktail Rings

Materials

Diamond, Opal, Platinum

French 1.00 Carat Diamond and Gold Platinum Set Eternity Ring- Size 5 3/8
Located in Jesmond, Newcastle Upon Tyne
An impressive vintage French import 1 carat diamond and 18 carat yellow gold, platinum set full
Category

Vintage 1980s French Cocktail Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Art Deco GIA 3 Carat Round Brilliant Cut Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
resized Gram weight: 3.28 This Art Deco ring showcases a captivating 3-carat Round Brilliant Cut diamond
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Platinum 3 Carat Antique Pear Diamond 3.64 Carat IGI Certified
Located in Cape May, NJ
Carat Weight: 3 carats total Color/Clarity: J/K - Vs1/2 Size: 6.75 Weight: 8.24 Grams Hight off
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

AGL Certified 4.23 Carat Ceylon Blue Sapphire Diamond 3 Stone Platinum Ring
Located in Baltimore, MD
AGL Certified 4.23 Carat Ceylon Blue Sapphire & Diamond 3 Stone Platinum Ring AGL report # 1123002
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

GIA Certified 7.01 Carat Light Yellow Platinum Diamond 3-Stone Engagement Ring
Located in Baltimore, MD
GIA Certified 7.01 Carat Radiant Light Yellow Y-Z Range VS2 Platinum Diamond 3 Stone Engagement
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Yellow Gold, Platinum

GIA Certified 2.60 Carat Oval Blue Sapphire and Diamond 3 Stone Platinum Ring
By H H Jewels
Located in Miami, FL
GIA Certified 2.60 Carat Oval Blue Sapphire and Diamond 3 Stone Platinum Ring Handmade by H&H
Category

2010s Fashion Rings

Materials

Diamond, Blue Sapphire, Platinum

GIA 2.83 Carat Natural Fancy Yellow Radiant 3-Stone Diamond Platinum Ring
Located in New York, NY
A Superb ESTATE 3 STONE NATURAL FANCY "Canary" Yellow Radiant cut GIA 2.83ctw DIAMOND Ring. The
Category

Early 2000s Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

3 Carat GIA Certified Natural Fancy Light Pink Marquise Diamond Platinum Ring
Located in Boca Raton, FL
Style: Platinum GIA Certified 3ct Natural Fancy Light Pink Marquise Diamond Engagement Ring
Category

21st Century and Contemporary Engagement Rings

Materials

Pink Diamond, White Diamond, 18k Gold, Platinum

Art Deco 1.34 Carat Old European Cut Diamond Platinum 3 Stone Ring
Located in Philadelphia, PA
carat total. Eye clean and bright with milgrain surround. Tested as platinum. Circa: 1930's. Ring size
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

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3 Carat Platinum Ring For Sale on 1stDibs

Find the exact 3 carat platinum ring you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using Platinum, Gold and 18k Gold. You can easily find a 16020 antique edition and 14603 modern creations to choose from as well. If you’re looking for a 3 carat platinum ring from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 18th Century while another version may have been produced as recently as the 21st Century. For this particular accessory, there are many different carat weights to choose from, but .5 Carat and 1 Carat versions are of considerable interest. There have been many well-made iterations of the classic 3 carat platinum ring over the years, but those made by Tiffany Co., LB Exclusive and Antinori Fine Jewels are often thought to be among the most beautiful. A round cut version of this piece has appeal, but there are also emerald cut and old european cut versions for sale. When shopping for a 3 carat platinum ring, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a 3 Carat Platinum Ring?

The price for a 3 carat platinum ring starts at $1 and tops out at $475,940,000 with these rings, on average, selling for $10,511.

The Legacy of Diamond in Jewelry Design

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 ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.  

Finding the Right Rings for You

Antique and vintage rings have long held a special place in the hearts of fine jewelry lovers all over the world.

No matter their origin or specific characteristics, rings are timeless, versatile accessories. They’ve carried deep meaning since at least the Middle Ages, when diamond rings symbolized strength and other kinds of rings were worn to signify romantic feelings or to denote an affiliation with a religious order. Rings have also forever been emblematic of eternity.

Over time, rings have frequently taken the form of serpents, which have long been associated with eternal life, health and renewal. Italian luxury jewelry house Bulgari has become famous for its widely loved Serpenti motif, for example, and its Serpenti ring, like the other accessories in the collection, began as an homage to jewelry of the Roman and Hellenistic eras. The serpent is now a popular motif in fine jewelry. Jewelry devotees have long pined for rings adorned with reptiles, thanks to antique Victorian rings — well, specifically, Queen Victoria’s illustrious engagement ring, which took the form of a gold snake set with rubies, diamonds and an emerald (her birthstone). Designs for Victorian-era engagement rings often featured repoussé work and chasing, in which patterns are hammered into the metal.

Engagement rings, which are reliably intimidating to shop for, are still widely recognized as symbols of love and commitment. On 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

The most collectible antique engagement rings and vintage engagement rings are those from the Victorian, Edwardian and Art Deco eras. Named for the monarchies of the four King Georges, who in succession ruled England starting in 1714 (plus King William’s reign), antique Georgian rings, be they engagement rings or otherwise, are also coveted by collectors. Pearls, along with colored gemstones like garnets, rubies and sapphires, were widely used in Georgian jewelry. The late-1700s paste jewelry was a predecessor to what we now call fashion or costume jewelry

The Art Nouveau movement (1880–1910) brought with it rings inspired by the natural world. Antique Art Nouveau rings might feature depictions of winged insects and fauna as well as women, who were simultaneously eroticized and romanticized, frequently with long flowing hair. Art Deco jewelry, on the other hand, which originated during the 1920s and ’30s, is by and large “white jewelry.” White metals, primarily platinum, were favored over yellow gold in the design of antique Art Deco rings and other accessories as well as geometric motifs, with women drawn to the era’s dazzling cocktail rings in particular.

Whether you’re hunting down a chunky classic for a Prohibition-themed cocktail party or seeking a clean contemporary design to complement your casual ensemble, find an exquisite collection of antique, new and vintage rings on 1stDibs.