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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

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

1.00ctw 3-Stone Diamond Platinum Engagement Ring
Located in Houston, TX
This engagement ring features 1.00ctw of three prong-set round brilliant diamonds in a platinum
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, 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

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

Tiffany & Co. Platinum 3 Round Brilliant Diamond Engagement Ring .75cts #17290
By Tiffany & Co.
Located in Washington Depot, CT
Tiffany & Co. Platinum 3 Round Brilliant Diamond Engagement Ring .75cts This beautiful platinum
Category

1990s Engagement Rings

Materials

Diamond, White 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

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

Rachel Koen 0.95cttw Round Cut Diamond Engagement Ring Set Platinum
Located in New York, NY
engagement ring is encrusted with a prong set center round brilliant cut diamond weighing 0.30 carat with
Category

2010s Modern Engagement Rings

Materials

Diamond, 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

Platinum Diamond Vintage Engagement Ring, 900 Round Cut 1.18 Carat
Located in Greensboro, NC
Surprise the love of your life with her dream ring! Crafted in heirloom-quality 900 platinum, this
Category

20th Century Engagement Rings

Materials

Diamond, Platinum

Diamond Engagement Platinum Ring
Located in Beverly Hills, CA
One antique style diamond engagement platinum ring featuring one prong set, old European cut
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

3 Carat Round Diamond Engagement Ring with Custom 3-Sided Pave Setting
By Hannah Florman
Located in Boston, MA
GIA certified diamond engagement ring with 3 carat center stone, G color and VS2 clarity (**this
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum, 14k Gold

3 Carat Round Diamond Engagement Ring with Custom 3-Sided Pave Setting
By Hannah Florman
Located in Boston, MA
GIA certified diamond engagement ring with 2 carat center stone, J color with VS1 clarity (**this
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum, White Gold

3 Carat Round Brilliant Diamond Solitaire Engagement Ring, GIA Certified
Located in New York, NY
Spectacular engagement ring crafted in Platinum, showcasing a GIA certified round brilliant cut
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Vintage Platinum 4.29ctw Round Garnet Baguette Diamond Solitaire Engagement Ring
Located in Montclair, NJ
Here we have a truly breathtaking vintage ring crafted from solid platinum featuring an elegant 3
Category

Vintage 1950s Retro Engagement Rings

Materials

Diamond, Garnet, Platinum

2.06 Carat Certified Round Brilliant Diamond Platinum Vintage Engagement Ring
Located in Hamilton, AU
Crafted in platinum is this timeless diamond solitaire ring carefully set with an alluring 2.06
Category

21st Century and Contemporary Australian Modern Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. 3 Carat Round Brilliant Cut Diamond Platinum Ring
By Tiffany & Co.
Located in Rome, IT
Tiffany & Co. 3.08 ct Platinum Round Brilliant Cut Diamond Solitaire Engagement Ring. The ring
Category

2010s American Modern Engagement Rings

Materials

Diamond, Platinum

Art Deco Platinum 1.03 Carat D VS1 Round Diamond Engagement Ring
Located in Los Angeles, CA
diamond on each side of the center diamond, with 3 round diamonds that are pave set on top and bottom of
Category

21st Century and Contemporary Art Deco 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

Blue Topaz, Topaz, White Diamond, Diamond, Platinum

2.53 Carat Round Cut Baguette Diamond Three-Stone Platinum Engagement Ring
Located in Stamford, CT
1940s round brilliant cut light yellow center diamond. EGL certified, in a platinum three-stone
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Three Stone Round Brilliant Cut Diamond Platinum Engagement Ring
By Tiffany & Co.
Located in Tampa, FL
This classic Tiffany & Co. three stone diamond engagement ring features 3 round brilliant cut
Category

2010s American Modern Engagement Rings

Materials

Diamond, Platinum

Retro Platinum & Round Mixed Cut 0.95 Ct Diamond Engagement Ring
Located in Philadelphia, PA
A fine retro diamond engagement ring. Set in a platinum mounting. With a ca. 0.95 ct round mixed
Category

Mid-20th Century Retro Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.01 Carat VS2, E Round Solitaire Diamond Engagement Platinum Ring
Located in New York, NY
GIA Certified, 1.01 Ct VS2, E Round Brilliant Diamond Engagement Platinum Ring GIA cert
Category

2010s Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. IDEAL CUT 3 Carat Round Brilliant Cut Diamond Platinum Ring
By Tiffany & Co.
Located in Rome, IT
Tiffany & Co. 3 Carat Round Brilliant Cut Diamond Platinum Ring This Tiffany & Co. Diamond
Category

2010s American Modern Engagement Rings

Materials

Diamond, White Diamond, 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

Blue Sapphire, Pink Sapphire, Tanzanite, Topaz, Tourmaline, Turquoise, S...

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

Black Pearl Diamond Platinum Ring Wedding Engagement Ring
Located in New York, NY
platinum is gorgeous. The pearl is 6 mm in diameter. The diamonds total approximately 1/3 Carat and are
Category

20th Century Unknown Contemporary Engagement Rings

Materials

Diamond, Black Pearl, Platinum

Tacori Diamond Royal T GIA 4 Carats Round Brilliant Platinum Engagement Ring
By Tacori
Located in Austin, TX
This iconic platinum diamond ring is a Tacori Royal T stunner! The 4.00 carat round diamond is GIA
Category

21st Century and Contemporary American Artisan Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA 12.63ct Fancy Yellow Radiant Diamond 3-Stone Platinum Engagement Ring
By Sebastian Bernard
Located in Los Angeles, CA
Platinum with 18k Yellow gold accent 3 Stone Ring with 2 Trapezoid Cut diamonds on the side (1.31 Ct). The
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Yellow Diamond, Diamond, Platinum, 18k Gold

GIA 2.85ctw H SI1 Round Cut Diamond Engagement Wedding Platinum Estate Ring
Located in New York, NY
cherish this fine diamond ring for a lifetime! The Center Diamond is a NATURAL, earth-mined Round
Category

Early 2000s North American Engagement Rings

Materials

Diamond, Platinum

Platinum & 14K Gold GIA Padparadscha Sapphire & Diamond 3 Stone Engagement Ring
Located in Montclair, NJ
This custom and newly crafted three stone engagement ring features a gorgeous and absolutely fiery
Category

2010s American Engagement Rings

Materials

Diamond, Sapphire, Padparadscha Sapphire , 14k Gold, Platinum

Platinum GIA Certified Diamond Engagement Ring
By Thomas Kurilla
Located in New York, NY
Platinum Diamond Engagement Ring ,Tiffany Designer Thomas Kurilla continues in his, "Less is more
Category

2010s American Contemporary Engagement Rings

Materials

Diamond

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

Edwardian Diamond and Platinum Engagement Ring
Located in New York, NY
Lovely antique diamond engagement ring, set in platinum. A softly rounded shape contours the low
Category

Vintage 1910s American 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

Retro Platinum Cathedral 0.74 Ctw Round Brilliant Cut Diamond Engagement Ring
Located in Philadelphia, PA
A fine Retro three-stone diamond engagement ring. Set in an American platinum cathedral setting by
Category

Mid-20th Century American Retro Engagement Rings

Materials

Diamond, Platinum

1.50 Carat Round Cut Diamond Engagement Ring
Located in Los Angeles, CA
Unique Diamond Engagement Ring. You may choose to customize the center stone between 0.50-1.00ct
Category

2010s Engagement Rings

Materials

Diamond, Gold, 14k Gold, 18k Gold, White Gold, Yellow Gold, Platinum

GIA Certified 7.60 Carat Round Diamond Engagement Ring
By M&V Vanguard Jewelry
Located in New York, NY
Mounted in handmade custom design setting featuring Platinum 950, diamond shank with 3 rows of
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Diamond and Emerald Art Deco Style Engagement Ring in Platinum 950
Located in Bangkok, TH
This vintage style ring centers a round cut diamond, weighing approximately 0.50 carat in bezel set
Category

21st Century and Contemporary Thai Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

GIA Ideal Cut Round Diamond 3 Carat Diamond Ring
By Hearts On Fire
Located in Rome, IT
diamond weights 3 carats plus 0.50 carats of round diamond pave ring set in solid platinum
Category

2010s American Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

Bvlgari Round Brilliant Cut Diamond Ring in Platinum 0.35ct G/VVS2
By Bulgari
Located in London, GB
A stunning diamond single stone ring in platinum by Bvlgari. The ring is set to the centre with an
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Modern Diamonds Platinum Lace Round Ring
Located in Poitiers, FR
Ring in platinum. Presenting a round setting, this sublime diamond ring is crafted in platinum lace
Category

21st Century and Contemporary French Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

1.20ctw Platinum Sapphire Diamond Halo Engagement Ring
Located in McLeansville, NC
A vintage platinum sapphire and diamond halo engagement ring. This alternative engagement ring
Category

Vintage 1970s Engagement Rings

Materials

Diamond, Sapphire, 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

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

Vintage 1970s 1.21 Carat Diamond and Platinum Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
diverse range of engagement rings. This stunning, fine and impressive vintage diamond and platinum
Category

Vintage 1970s Unknown Engagement Rings

Materials

Diamond, Platinum

1.30 Carat Old European Diamond Platinum Engagement Ring
Located in New York, NY
round cut diamond accents. The top of the ring measures 13mm in diameter. It is currently size 6 3/4
Category

Late 20th Century Engagement Rings

Materials

Diamond, Platinum

Vintage Platinum 1950s 1.31 Carat Round Diamond Ring
Located in Boston, MA
Vintage Platinum 1950s 1.31ct Round Diamond Ring - Center circular brilliant transitional cut
Category

Mid-20th Century American Retro Engagement Rings

Materials

Diamond, Platinum

0.86 Carat E, VS1 Round Diamond Engagement Ring, Three-Stone Diamond Ring GIA
Located in Honolulu, HI
Stunning Platinum 3 stone engagement ring with 0.86 carat round brilliant diamond center and two
Category

21st Century and Contemporary Hong Kong Modern Engagement Rings

Materials

Diamond, 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

Art Deco Revival Round Yellow Diamond Engagement Ring
Located in Santa Barbara, CA
. Drawing you in, a stunning 3/4 carat round brilliant VS2 yellow diamond reminding us of antique class and
Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

GIA Certified 12.03 Carat Brilliant Round Diamond Engagement Ring
By Roman Malakov
Located in New York, NY
This gorgeous important engagement ring features a GIA Certified 12.03 carat brilliant round shape
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

2.01ct D/SI1 GIA Cushion Diamond 3 Stone Platinum Engagement Ring W. Hidden Halo
By Sebastian Bernard
Located in Los Angeles, CA
& 6 1.1 mm Round Brilliant diamonds Metal: Platinum 5.6 gr. Ring size: 6-1/4 Custom sized to fit.
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

Mid-Century Transitional Cut 1.60 Carats Diamond Platinum Engagement Ring
Located in Philadelphia, PA
Engagement ring centers a round transitional cut diamond weighing 1.25 carat total - H color with
Category

Vintage 1950s Retro Engagement Rings

Materials

Diamond, White Diamond, Platinum

Art Deco Inspired Diamond Onyx Platinum Engagement Ring
Located in Beverly Hills, CA
One Art Deco Inspired Diamond Onyx Platinum Engagement Ring. Featuring one old European cut diamond
Category

2010s Art Deco Engagement Rings

Materials

Diamond, Onyx, Platinum

Antique Art Deco Platinum and Diamond Engagement Ring
Located in Great Neck, NY
Stunning, simple, classic art deco engagement ring in platinum with a asscher cut diamond center
Category

Mid-20th Century Art Deco Engagement Rings

Materials

Diamond, 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

Marquise & round brilliant cut diamonds "Ballerina" ring set in platinum
Located in Surfside, FL
Marquise & round brilliant cut diamonds "Ballerina" ring set in platinum (over 3.75 carats approx
Category

20th Century Engagement Rings

Materials

Platinum

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3 Round Diamond Engagement Ring In Platinum For Sale on 1stDibs

Find the exact piece of 3 round diamond engagement ring in platinum you’re shopping for in the variety available on 1stDibs. Frequently made of gold, 18k gold and white gold, this item was constructed with great care. You can easily find a 727 antique edition and 508 modern creations to choose from as well. You’re likely to find the perfect item from our selection of 3 round diamond engagement ring in platinum among the distinctive items we have available, which includes versions made as long ago as the 19th Century as well as those produced as recently as the 21st Century. Finding an appealing choice in our collection of 3 round diamond engagement ring in platinum — no matter the origin — is easy, but Tiffany & Co., Cartier and Antinori Fine Jewels each produced a popular version that is worth a look. A round cut version of this piece has appeal, but there are also oval cut and old european cut versions for sale. If you’re browsing our inventory for an object in our assortment of 3 round diamond engagement ring in platinum, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a 3 Round Diamond Engagement Ring In Platinum?

On average, a piece of 3 round diamond engagement ring in platinum at 1stDibs sells for $7,423, while they’re typically $104 on the low end and $979,000 for the highest priced versions of this item.

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.