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12 Carat Round Diamond Engagement Ring

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2.49 Carat Oval Blue Sapphire Round Diamond Hasbani 18Kt Halo Engagement Ring
By Hasbani Diamonds
Located in London, GB
0.54 carat diamonds white colour G, clarity VS / SI round brilliant cut diamonds. This Ring has been
Category

2010s British Modern Engagement Rings

Materials

Diamond, White Diamond, Blue Sapphire, Gold, 18k Gold, White Gold

3.46 Carat Oval Blue Sapphire Round Diamond Hasbani 18Kt Halo Engagement Ring
By Hasbani Diamonds
Located in London, GB
An impressive 3.46 carat total gem weight, 2.46 carat Blue Sapphire Dress / Engagement Ring
Category

2010s British Modern Engagement Rings

Materials

Diamond, White Diamond, Blue Sapphire, Gold, 18k Gold, White Gold

12 Carats Round Brilliant Diamond Engagement Ring Certified I VVS1 IGI Report
Located in New York, NY
Earth Mined Center Diamond: Carat Weight: 10.02 Carats Color: I* Clarity: VVS1 Style: Round
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

12 Carat Round Cut Diamond Engagement Ring GIA Certified E IF
Located in New York, NY
SAMATHA ROUND DIAMOND ENGAGEMENT RING IN 18K WHITE GOLD BY MIKE NEKTA GIA CERTIFIED Center
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Belais .12 Carat Diamond Art Deco Gold Engagement Ring
Located in Stamford, CT
Belais diamond engagement ring. 18k white gold original Art Deco circa 1920s with highly detailed
Category

Early 20th Century Engagement Rings

Materials

Diamond, Gold, 14k Gold, White Gold

4 carat Round Engagement Ring Mounting
Located in Dublin, IE
Primary Stone Size: 4.5 carat Primary Stone Shape: Round Estimated Set Diamond Weight: 4 1/5 CTW Primary
Category

2010s Irish Modern Engagement Rings

Materials

White Diamond, Platinum

GIA Certified 1.01 Carat Round Brilliant Diamond Engagement Ring
Located in Beverly Hills, CA
18k white gold engagement ring, featuring a sparkling GIA-certified 1.01ct G-SI2 round brilliant
Category

21st Century and Contemporary Unknown Contemporary Engagement Rings

Materials

White Diamond, Diamond, White Gold, 18k Gold, Gold

Peter Suchy .88 Carat Round Tourmaline Diamond White Gold Engagement Ring
By Peter Suchy
Located in Stamford, CT
Round tourmaline and diamond white gold engagement ring. The center piece of this ring features a
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Tourmaline, Gold, 18k Gold, White Gold

0.40 Carat Round Brilliant Cut 7 Baguette Diamond White Gold Engagement Ring 7
By H & H Jewels
Located in Miami, FL
0.40 Carat Round Brilliant Cut 7 Baguette Diamond White Gold Engagement Ring This is a handmade
Category

2010s Engagement Rings

Materials

Diamond, 14k Gold, White Gold

12 Carat Internally Flawless Diamond Engagement Ring GIA Certified E Color
Located in New York, NY
SAMATHA ROUND CUT DIAMOND ENGAGEMENT RING IN 18K WHITE GOLD BY MIKE NEKTA GIA CERTIFIED Center
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

GIA Certified 1.12 Carats Total Round Cut Diamond Solitaire Engagement Ring
By Roman Malakov
Located in New York, NY
This ring features a round brilliant diamond weighing 1.12 carats that GIA certified as G color SI1
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

1 Carat Diamond Engagement Ring, White Gold, Round, Vintage, Detailed
By Five Star Jewelry
Located in Austin, TX
Diamond Weight: .92 Carats Side Diamond: .12 Carats Main Diamond Shape: Round Brilliant Ring Size: 6
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Gold, 14k Gold, White Gold

Brilliant Cut 0.90 Carats Diamond 'GIA Cert' and 12 Diamonds Engagement Ring
Located in MELBOURNE, VIC
Hand made 18 carat White Gold Engagement Ring Claw set with one Round Brilliant Cut diamond, Weight
Category

2010s Australian Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

1.40 Carat Round Diamond Halo 18 Karat White Gold Engagement Ring
Located in Sherman Oaks, CA
One electronically tested 18k White Gold Ladies Cast Diamond Unity Ring Condition is very good
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 18k Gold

.70 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Details: Weight: .70 carat Cut: Transitional Round Color: F Clarity: VS Side Diamond Details: Weight: .12
Category

Vintage 1940s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

Sylvie GIA Certified 1.14 Carat Diamond Engagement Ring
Located in Stamford, CT
Sylvie round diamond cushion engagement ring. GIA certified center stone with a halo of round
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

12 Carat Emerald Cut Diamond Engagement Ring GIA Certified E VVS1
Located in New York, NY
GIA CERTIFIED Center Diamond: Carat Weight: 10.40 Carats Color : E* Clarity: VVS1 Style: Emerald
Category

2010s American Engagement Rings

Materials

Diamond, White Gold, 18k Gold

1.00 Carat Diamond Rectangular White Gold Diamond Engagement Ring
Located in Stamford, CT
Diamond rectangular engagement ring. 1.00ct round invisible set diamonds with baguette accent
Category

Late 20th Century Engagement Rings

Materials

Diamond, Gold, 14k Gold, White Gold

.57 Carat Diamond Yellow Gold Infinity Engagement Ring
Located in Stamford, CT
. 1 round brilliant cut L VS Diamond, Approx. .52 carat 12 round brilliant cut H-I VS diamonds, Approx
Category

Late 20th Century Engagement Rings

Materials

Diamond, Gold, 14k Gold, Yellow Gold

Tiffany & Co. Round Circlet 0.64 Carat G VS Diamond Engagement Ring in Platinum
By Tiffany & Co.
Located in San Diego, CA
: 6 - sizable Total Carat Weight: 0.64 TCW Diamond Shape: Round Brilliant Hallmark: " ©Tiffany
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Natural Diamond Ring 0.30 Carats 18 Karat Yellow Gold Engagement Ring
Located in Antwerpen, BE
engagement, love token, or promise ring for your beloved. Each diamond in this stunning cluster is hand
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Natural Diamond Ring 0.30 Carats 18 Karat White Gold Engagement Ring
Located in Antwerpen, BE
engagement, love token, or promise ring for your beloved. Each diamond in this stunning cluster is hand
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Natural Diamond Ring 0.30 Carats 18 Karat Rose Gold Engagement Ring
Located in Antwerpen, BE
engagement, love token, or promise ring for your beloved. Each diamond in this stunning cluster is hand
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, Rose Gold

.49 Carat Diamond Sapphire Art Deco Platinum Engagement Ring
Located in Stamford, CT
.49ct Diamond Sapphire Platinum Art Deco engagement ring. Diamond Platinum Art Deco design ring
Category

Early 20th Century Engagement Rings

Materials

Blue Sapphire, Diamond, Sapphire, Platinum

Natural Diamond Ring 0.51 carats 18 Karat White Gold 5 Diamonds Engagement Ring
Located in Antwerpen, BE
planning a proposal or looking to reaffirm your love, our Round-shape Diamond Engagement Ring is the
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, White Gold

12 Carat Pink Sapphire Diamond Cocktail Ring 18k
By Antinori Fine Jewels
Located in Rome, IT
This exquisite Cocktail/Statement Ring in 18k White Gold showcases a total weight of 12.14 carats
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Pink Sapphire, 18k Gold, White Gold

Natural Diamond Ring 0.27 carats 18 Karat White Gold Engagement Ring
Located in Antwerpen, BE
: Natural Diamonds Shape: Round Brilliant Diamond Total Carat Weight: 0.27 cts Number of Gemstones: 18
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Natural Diamond Ring 0.25 carats 18 Karat Rose Gold Engagement Ring
Located in Antwerpen, BE
: Natural Diamonds/ Ethically Sourced Shape: Round Brilliant Total Carat Weight: 0.25 cts Number of
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, Rose Gold

1.17 Carat Diamond Platinum Art Deco Engagement Ring
Located in Stamford, CT
1930's Diamond engagement ring. Round transitional cut center diamond with 12 old European accent
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

.50 Carat Sapphire Diamond Halo Flower Gold Engagement Ring
By Peter Suchy
Located in Stamford, CT
Sapphire and diamond engagement ring. 18k white and yellow gold handmade setting with a round
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, White Gold, Yellow Gold

Peter Suchy GIA Certified .55 Carat Yellow Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
0.55 carat fancy yellow radiant cut diamond and white diamond engagement ring. Rectangular yellow
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

1.05 Carat Natural Fancy Yellow Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Natural custom cut round yellow Sapphire engagement ring with round cut diamond accents in a solid
Category

1990s Engagement Rings

Materials

Diamond, Sapphire, Yellow Sapphire, Platinum

1.50 Carat Diamond Yellow Gold Engagement Ring
Located in Miami, FL
flanked by two trilliant cut diamonds and 12 round brilliant cut diamonds weighing .36cts. The ring is a
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, White Diamond, 18k Gold, Yellow Gold

Leo Diamond Engagement Ring Princess Cut 1.48 TCW Diamond Accent Band 14k WG
By The Leo Diamond
Located in San Diego, CA
Inscription: LEO5090869S Accent Diamond: 12 Round Cut Diamonds 0.44 TCW Color & Clarity: H - I / SI
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Natural Diamond Ring 0.85 carats 18KT White Gold 5 Round Solitaire Diamond Ring
Located in Antwerpen, BE
Embark on a journey of enhanced splendor with this Italian Handmade 5 Round Cut Engagement Ring
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Vivid Diamonds AGL Certified 5.91 Carat Burma No Heat Sapphire & Diamond Ring
By Vivid Diamonds
Located in Miami, FL
encircled by 12 round brilliant-cut diamonds with a combined weight of approximately 2 carats, H-I color
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

3.29 Carat Yellow Sapphire Diamond White Gold Engagement Ring
By Roshe Jewels
Located in Los Angeles, CA
0.37 Carats (Clarity: VS2, Color: H). The shank of the ring has 12 Round Cut Yellow Diamonds that
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, White Diamond, Yellow Diamond, Yellow Sapphire, 18k Gold, White...

GIA Certified 1.39 Carat Natural Yellow White Diamond Platinum Engagement Ring
Located in Stamford, CT
1900's yellow and white diamond halo engagement ring. GIA 1.39ct bezel set old mine brilliant cut
Category

Early 20th Century Engagement Rings

Materials

White Diamond, Yellow Diamond, Diamond, Platinum

2.68 Carat Orange Sapphire Diamond Engagement Yellow Gold Ring
By DGI
Located in Los Angeles, CA
Sapphires weighing 0.59 Carats. The shank of the ring has 12 Round Cut Diamonds weighing 0.30 Carats with a
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold

GIA Certified 1.00 Carat Diamond Rose Gold engagement Ring
Located in New York, NY
Handcrafted GIA Certified Diamond Ring featuring 1.00 Carat Round Brilliant Cut Diamond with H
Category

2010s American Art Deco Engagement Rings

Materials

Diamond, 18k Gold, Rose Gold

1.81 Carat Sapphire and Diamond 18 Carat White Gold Engagement Ring
Located in London, GB
This exquisite sapphire and diamond engagement ring features a beautiful 1.81ct round shaped
Category

2010s Unknown Modern Engagement Rings

Materials

Diamond, Sapphire, Gold, 18k Gold, White Gold

1.10 Carat Ruby Diamond Yellow Gold Ballerina Engagement Ring
By DGI
Located in Los Angeles, CA
Ballerina Ruby Diamond Ring with a Oval Cut 0.68 Carat Ruby which is surrounded by 12 Round Cut
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

.65 Carat Oval Emerald Diamond Gold Cluster Engagement Ring
Located in Stamford, CT
Emerald and diamond engagement ring. .65cts center oval emerald with triangle of 6 clustered
Category

Vintage 1970s Engagement Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold, Gold

Peter Suchy GIA Certified 1.01 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Peter Suchy diamond engagement ring set with one Ideal cut GIA certified oval diamond 1.01 carat
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

2.78 Carat Purple Octagon Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
2.78cts, SI2, 8.87 x 7.34 x 4.11mm, natural color, no heat and no enhancements 12 round diamonds, 2 full
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

1.06 Carat Diamond Sapphire Enamel Platinum Midcentury Engagement Ring
Located in Stamford, CT
1950's Diamond and sapphire red enamel engagement ring. Round old European center diamond in a hand
Category

Mid-20th Century Engagement Rings

Materials

Blue Sapphire, Diamond, Sapphire, Enamel, Platinum

1.82 Carat Blue Sapphire Diamond White Gold Engagement Ring
By DGI
Located in Los Angeles, CA
surrounded by 36 Round Cut Diamonds that weigh 0.38 Carats. The total carat weight of the ring is 1.82 Carats
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Blue Sapphire, 14k Gold, White Gold

Oval Cut Ruby Baguette & Round Brilliant Cut Diamond Halo Engagement Ring
By Antinori Fine Jewels
Located in Rome, IT
Oval Cut Ruby, Baguette & Round Brilliant Cut Diamond Halo Engagement Ring Set in 14k White Gold
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Ruby, White Gold, Yellow Gold, 14k Gold

GIA Certified 0.77 Carat Fancy Pink Diamond Double Halo Engagement Ring
By Roman Malakov
Located in New York, NY
surrounded by row of 14 pink round diamonds on a halo bezel setting. 12 pieces in total, white round diamonds
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Pink Diamond, 18k Gold, Platinum

1.48 Carat Blue Sapphire Diamond 14 Karat White Gold Engagement Ring
By DGI
Located in Los Angeles, CA
has a purplish blue hue to it. It is embellished with 12 Round Cut Diamonds that weigh 0.47 Carats
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Blue Sapphire, White Gold, 14k Gold

1.69tcw 18K Colombian Emerald-Round Cut & Diamond Wedding Engagement Ring
Located in Jupiter, FL
Elegantly displayed is a 1.69 Carats stylish round Colombian emerald and round diamond engagement
Category

2010s American Modern Engagement Rings

Materials

Diamond, Emerald, Gold, 14k Gold, White Gold, Yellow Gold

Natural Diamond 0.35 carats 18 Karat White Gold Cluster Engagement Ring
Located in Antwerpen, BE
sophisticated choice for an engagement ring. The dainty, modern style showcases the sparkling diamonds in a
Category

2010s Belgian Art Nouveau Engagement Rings

Materials

Diamond, 18k Gold, White Gold

GIA Certified .79 Carat Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Diamond and sapphire engagement ring. GIA Certified natural no heat oval .79 carat sapphire center
Category

21st Century and Contemporary Engagement Rings

Materials

Blue Sapphire, Diamond, Sapphire, Platinum

Natural Diamond Ring 0.55 Carats 18 Karats White Gold Statement Engagement Ring
Located in Antwerpen, BE
Experience elegance and sophistication with our 18k white gold diamond halo engagement ring
Category

2010s Belgian Modern Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Diamond Platinum Pierced Dome Engagement Ring
Located in Stamford, CT
Domed pierced diamond engagement ring. Set with old mine cut original diamonds with raised crowns
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

EGL Certified 2.07 Carat Diamond Art Deco Platinum Engagement Ring
Located in Stamford, CT
1930's Art Deco diamond engagement ring. EGL certified Old European cut 2.07ct diamond center stone
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.12 Carat Oval Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Vintage 1940's Natural 1.12 carat oval bright orange/pink sapphire and diamond engagement ring. Set
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

Bergio Platinum Diamond Engagement Ring
Located in Kirkwood, MO
Bergio Platinum and Diamond Engagement Ring. There is an 8.0 mm cubic zirconia center. This is
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

Diamond, Platinum

2.03 Carat Spinel Diamond 18 Karat White Gold Engagement Ring
By DGI
Located in Los Angeles, CA
Round Cut Diamonds that weigh 1.12 Carats. (Clarity: SI, Color: F) The beautiful setting is curated in
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Spinel, 18k Gold, White Gold

18KTW Gold Baguette Round Diamond Halo Cluster Accented Shank Engagement Ring
Located in Antwerpen, BE
Dazzle and drama come together in this stunning diamond halo cluster engagement ring set with skill
Category

2010s Belgian Art Deco Engagement Rings

Materials

Diamond, Gold, 18k Gold, White Gold

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12 Carat Round Diamond Engagement Ring For Sale on 1stDibs

Find the exact 12 carat round diamond engagement 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 White Gold. Find an antique version now, or shop for 15 vintage or 30 modern creation for a more contemporary example of these cherished accessories. Making the right choice when shopping for a 12 carat round diamond engagement ring may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 20th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. 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 12 carat round diamond engagement ring over the years, but those made by Antinori Fine Jewels, Tiffany & Co. and Shreve, Crump & Low are often thought to be among the most beautiful. Today, if you’re looking for a round cut version of this piece and are unable to find the perfect match, our selection also includes brilliant cut alternatives. When shopping for a 12 carat round diamond engagement ring, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a 12 Carat Round Diamond Engagement Ring?

On average, a 12 carat round diamond engagement ring at 1stDibs sells for $14,500, while they’re typically $850 on the low end and $1,625,000 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.