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Platinum 3 Carat Diamond Engagement Rings

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3 Carat GIA Radiant Cut Diamond Engagement Platinum Ring
By Diamond Scene
Located in New York, NY
A beautiful radiant cut diamond set in a timeless custom made mounting. 3.18 carat center H VS1
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

3 Carat Diamond Engagement Ring
By Vivid Diamonds
Located in Miami, FL
Spectacular engagement ring crafted in platinum, showcasing a GIA certified round brilliant cut
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

3 Carat GIA Certificate G Color Cushion Diamond Platinum Bespoke Engagement Ring
By Hasbani Diamonds
Located in London, GB
of 0.25 carat round brilliant cut. This is a stunning diamond engagement ring set in platinum with
Category

2010s British Modern Engagement Rings

Materials

Diamond, Platinum

3 Carat GIA Certificate E Color Cushion Diamond Platinum Bespoke Engagement Ring
By Hasbani Diamonds
Located in London, GB
stunning diamond engagement ring set in platinum with 950 British Hallmarked. Colour: E Clarity: VS2
Category

2010s British Modern Engagement Rings

Materials

Diamond, Platinum

3 Carat Round Diamond Engagement Ring in Platinum
By Hannah Florman
Located in Boston, MA
Customizable diamond engagement ring, shown with a GIA certified 3 carat round briliant diamond
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

1.17 Carat Diamond Platinum Engagement Ring
Located in New York, NY
This elegant platinum engagement ring is centered with a sparkling GIA certified old mine cut
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Platinum

Three Carat Diamond Platinum Engagement Ring
Located in New York, NY
diamond that weighs 3 carat and is graded I color with VS2 clarity. The ring is size 6 1/4, and can be
Category

20th Century Edwardian Engagement Rings

Materials

Diamond, Platinum

3 Carats Diamonds Platinum Ring
Located in PARIS, FR
Ring trilogy in platinum 950 thousandths. set with 3 diamonds. of which a brilliant of
Category

20th Century French Engagement Rings

Materials

Diamond, Platinum

2.19 Carat 3 Stone Diamond Engagement Ring Platinum in Stock
Located in Boca Raton, FL
Platinum 2.19ctw 3 Stone Diamond Engagement Ring This platinum round brilliant diamond engagement
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Platinum

GIA 5.01ct Cushion Diamond Engagement 3 Stone Platinum Engagement Ring
Located in New York, NY
you are looking for a SUPER Impressive Wedding Diamond Engagement Ring, it is your ring! A large
Category

Early 2000s Engagement Rings

Materials

Diamond, Platinum

3.00 Carat Diamond Engagement Platinum Ring
Located in Beverly Hills, CA
One 3.00 ct. diamond engagement platinum ring centering one prong set, round brilliant cut diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Scarselli 3 carat VIVID Yellow Radiant Cut Diamond Platinum Engagement Ring
By SCARSELLI
Located in New York, NY
diamonds in Platinum and 18 karat Yellow Gold. This Scarselli Classics ring is available in many
Category

2010s American Contemporary Engagement Rings

Materials

White Diamond, Yellow Diamond, Diamond, 18k Gold, Platinum

1.10 Carat Diamond Platinum Engagement Ring
Located in New York, NY
This amazing platinum engagement ring from the Art Deco era, is centered with a sparkling old mine
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

.90 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Item Details: Ring Size: 4 Metal Type: 900 PLATINUM [Hallmarked & Tested] Weight: 3 grams Center
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

0.85 Carat Diamond Platinum Engagement Ring
Located in New York, NY
This magnificent platinum ring from the Art Deco era, centers a sparkling old European cut diamond
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

1.10 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 3 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

Antique 2.30 Carat Diamond Platinum Engagement Ring
Located in New York, NY
This stunning platinum engagement ring from the Edwardian era, centers a sparkling GIA certified
Category

Early 20th Century Edwardian Engagement Rings

Materials

Diamond, Platinum

.70 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 8 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1940s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

.97 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Item Details: Ring Size: 4.25 Metal Type: Platinum [Hallmarked & Tested] Weight: 3 grams Center
Category

Vintage 1930s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

.20 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 6 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond Details
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

.40 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 6 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

1.04 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1930s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

.88 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 6 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond Details
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

.25 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 6 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

.50 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Item Details: Ring Size: 3.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

1.00 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

Diamond Platinum Engagement Ring
Located in New York, NY
This stunning platinum ring centers a sparkling old mine cut diamond that weighs 0.77ct. graded K-L
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

1.82 Carat Diamond and Platinum Halo Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
A stunning antique and contemporary 1.82 Ct diamond and platinum halo style halo ring; part of our
Category

Early 2000s Unknown Engagement Rings

Materials

Diamond, Platinum

Scarselli GIA 3 Carat VVS2 Fancy Light Yellow Diamond Engagement Ring Platinum
By SCARSELLI
Located in New York, NY
A 3.01 Cushion Cut, Natural Fancy Light Yellow Diamond Engagement Ring, GIA-Certified, flanked by
Category

2010s American Contemporary Engagement Rings

Materials

White Diamond, Diamond, Yellow Diamond, 18k Gold, Platinum

3 Carat Round Diamond Engagement Ring with Delicate Pave Setting Platinum
By Hannah Florman
Located in Boston, MA
GIA certified 3 carat round briliant diamond engagement ring with G color and VS2 clarity (**this
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

Scarselli GIA 3 Carat VVS2 Fancy Light Yellow Diamond Engagement Ring Platinum
By SCARSELLI
Located in New York, NY
A 3.01 Cushion Cut, Natural Fancy Light Yellow Diamond Engagement Ring, GIA-Certified, flanked by
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, White Diamond, Yellow Diamond, Yellow Gold, Platinum, 18k Gold

2.16 Carat GIA Diamond Platinum Engagement Ring
Located in New York, NY
This gorgeous platinum engagement ring is centered with a sparkling GIA certified radiant cut
Category

20th Century Contemporary Engagement Rings

Materials

Diamond, Platinum

1.42 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Platinum

Bespoke Halo Mount for 3-5 Carat Yellow White Diamond Oval Shape Platinum Ring
By Hasbani Diamonds
Located in London, GB
features 0.13 Carat Round Diamond Fancy Intense Yellow giving this Double Halo Diamond Engagement Ring an
Category

2010s British Modern Engagement Rings

Materials

Amethyst, Aquamarine, Citrine, Diamond, White Diamond, Pink Diamond, Eme...

2.66 Carat Marquise Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
A lovely engagement ring featuring a 2.66 carat marquise-shape diamond! It has a long beautiful
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Platinum

Vintage Diamond Platinum Engagement Ring, 1 Carat
Located in Palm Desert, CA
Vintage 1 Carat Diamond Platinum Engagement Ring. The Center Diamond measures 6.5mm x 6.64mm x
Category

Vintage 1940s Retro Engagement Rings

Materials

Diamond, Platinum

GIA 1 Carat Diamond Platinum Engagement Ring
Located in New York, NY
This fabulous platinum engagement ring from the Art Deco era, is centered with a sparkling GIA
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

GIA 3 Stone 1.40 Carat Art Deco Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 6.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.9 grams Center Diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

GIA 4.01 Carat H/VS2 Cushion Cut Diamond Platinum 3-Stone Engagement Ring
By Sebastian Bernard
Located in Los Angeles, CA
A beautiful square Cushion Cut H/VS2 GIA certified center Diamond set in a fine Platinum 3 stone
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA 4.64 Carat K/VS1 Round Brilliant Diamond Platinum 3-Stone Engagement Ring
By Sebastian Bernard
Located in Los Angeles, CA
A shiny 4.64 Ct Round Brilliant K/VS1 GIA Certified center Diamond set in a fine Platinum 3 Stone
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

.94 Carat Edwardian Diamond Platinum Engagement Ring
Located in Atlanta, GA
Item Details: Ring Size: 6.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center
Category

Vintage 1910s Unknown Edwardian Engagement Rings

Materials

White Diamond, Platinum

3 Carat Emerald Cut Diamond East to West Engagement Ring in Platinum
By Hannah Florman
Located in Boston, MA
GIA certified emerald cut diamond engagement ring with G color and VS2 clarity (**this ring can be
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

Vintage 1970s 1.21 Carat Diamond and Platinum Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive vintage 1.21 carat diamond and platinum dress ring; part of our
Category

Vintage 1970s Unknown Engagement Rings

Materials

Diamond, Platinum

Blue Topaz 2.20 Carat Oval 0.20 Carat Round Diamond Platinum Halo Ring
By Hasbani Diamonds
Located in London, GB
is set with 3 claws for a sparkly star effect look. This ring has a total gem weight of 2.40 Carat
Category

2010s British Modern Engagement Rings

Materials

Diamond, White Diamond, Topaz, Blue Topaz, Platinum

1.30 Carat Old European Diamond Platinum Engagement Ring
Located in New York, NY
This gorgeous platinum engagement ring is centered with a sparkling GIA certified old European cut
Category

Late 20th Century Engagement Rings

Materials

Diamond, Platinum

.50 Carat Diamond Solid Platinum Art Deco Engagement Ring
Located in Stamford, CT
platinum handmade engagement setting. Accented with 3 round single cut diamonds on each. A simple but yet
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

1.03 Carat GIA Cert Diamond Platinum Engagement Ring
Located in New York, NY
This stunning platinum engagement ring is centered with a sparkling GIA certified circular
Category

20th Century Edwardian Engagement Rings

Materials

Diamond, Platinum

1.77 Carat Transitional Cut Diamond Platinum Engagement Ring
Located in Stamford, CT
1940's transitional cut round diamond engagement ring. EGL certified round transitional cut diamond
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

1.00 Carat Princess Cut Platinum Diamond Engagement Ring
Located in Scottsdale, AZ
Designer: custom design Material: Platinum Center Diamond: 1 princes cut= 1.00ct GIA 15167077
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

2.05 Carat GIA Cert Diamond Platinum Engagement Ring
Located in New York, NY
by dazzling old mine cut diamond accents. The ring is size 6 3/4, and can be resized. Inventory
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

Platinum Pear Shape 3 Stone Engagement Ring
Located in Dallas, TX
From the Eiseman Collection, platinum 3 diamond engagement ring featuring a 2.29 carat pear shaped
Category

21st Century and Contemporary Modern Engagement Rings

Materials

Diamond, Platinum

GIA Certified 3 Carat Round Cut Diamond Platinum Ring
By Antinori Fine Jewels
Located in Rome, IT
Embrace the unparalleled allure of this exquisite GIA certified 3 carat round cut diamond platinum
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 5.51 Carat Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Wonderful oval 5.51 carat certified natural deep blue sapphire and diamond engagement ring. Mounted
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

10.35 Carat Rectangle Aquamarine Ruby Diamond Platinum Engagement Ring
Located in Stamford, CT
Magnificat 1930's Aqua, ruby and diamond engagement ring. At the center of this Art Deco design is
Category

Early 20th Century Engagement Rings

Materials

Aquamarine, Diamond, Ruby, Platinum

GIA Certified 2.49 Carat Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Sapphire and diamond engagement ring. Natural GIA certified green blue cushion cut 2.49 carat
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Mid-Century 1.66 Carats Diamond Platinum Engagement Ring
Located in Philadelphia, PA
Featuring a round brilliant cut diamond weighing approximately 1.31 carats - H color with SI1
Category

Vintage 1950s Retro Engagement Rings

Materials

Diamond, White Diamond, Platinum

3 Carat Pear Shape Diamond Engagement Ring GIA Certified
Located in New York, NY
AVA 3 CARAT PEAR SHAPE THREE STONE DIAMOND ENGAGEMENT RING CERTIFIED 2 CT BY MIKE NEKTA GIA
Category

2010s American Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

2 Carat Fancy Intense Yellow Diamond 3 Stones Engagement Ring GIA Cert. Platinum
Located in New York, NY
A breathtaking Three-Stones Engagement Ring featuring a 2-carat Fancy Intense Yellow Radiant cut
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Yellow Diamond, Pink Diamond, Rose Gold, Platinum

1.57 Carat GIA Cert Diamond Platinum Engagement Ring
Located in New York, NY
This fabulous platinum engagement ring from the Art Deco era, is centered with a sparkling GIA
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

5.05 Carat Round Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Round sapphire and diamond handmade engagement ring. Rich blue with a hint of purple round sapphire
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Blue Sapphire, Sapphire, Platinum

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Platinum 3 Carat Diamond Engagement Rings For Sale on 1stDibs

Browse a vast assortment of platinum 3 carat diamond engagement rings for sale on 1stDibs. These distinct designs — crafted with great care and often made from platinum, gold and 18k gold — can elevate any look. Our collection of these items for sale includes 7007 vintage editions and 3357 modern creations to choose from as well. Our collection, which features older pieces for sale from the 18th Century and newer versions made as recently as the 21st Century, has proven very popular over the years. The designs in our inventory of platinum 3 carat diamond engagement rings bearing Art Deco or modern hallmarks are very popular. Tiffany & Co., Peter Suchy and Antinori Fine Jewels each produced beautiful examples of these items that are worth considering. There are many round cut, old european cut and emerald cut platinum 3 carat diamond engagement rings for sale. There aren’t many items for men in our collection of platinum 3 carat diamond engagement rings, as most of the options available are for women.

How Much are Platinum 3 Carat Diamond Engagement Rings?

Prices for platinum 3 carat diamond engagement rings start at $1 and top out at $6,375,000 with these rings, on average, selling for $9,996.

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.

Questions About Platinum 3 Carat Diamond Engagement Rings