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2 Carat Round Cut Diamond Ring

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GIA Certified 2 Carat Round Cut Diamond with 2 Pear Cut Side Stones 18K gold
By Antinori Fine Jewels
Located in Rome, IT
Adorn yourself with the timeless elegance of this GIA Certified 2 Carat Round Cut Diamond Ring
Category

2010s Unknown Contemporary Three-Stone Rings

Materials

Diamond, Gold, 18k Gold, White Gold

3.11 Carat Millennium Round Cut Round Citrine and Diamond Gold Ring
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Stunning Citrine Ring The ring is 14K White Gold There are 0.27 Carats In Diamonds H/I I1 The Round
Category

21st Century and Contemporary Hong Kong Contemporary Cocktail Rings

Materials

Citrine, Diamond, White Diamond, Gold, 14k Gold, White Gold

2 Carat Three Row Baguette & Round Brilliant Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
2.08 ct Total Weight 3 Three Row Baguette & Round Brilliant Cut Diamond 14k White Gold Wedding
Category

2010s Italian Contemporary Band Rings

Materials

Diamond, 14k Gold, Yellow Gold

18K White Gold Round-Cut 1/2 Carat Diamond Ring
Located in New York, NY
Available Upon Request.’ Product Features: Diamond Type: Natural White Diamonds Diamond Count: 9 Round-Cut
Category

21st Century and Contemporary Indian Contemporary Bridal Rings

Materials

Diamond, White Diamond, 18k Gold, White Gold

Tiffany & Co. 2 Carat Round Brilliant Cut Solitaire Diamond Platinum Ring
By Tiffany & Co.
Located in Rome, IT
Natural Round Brilliant Cut Diamond weighing 2 carat D Color VS1 Clarity
Category

2010s American Solitaire Rings

Materials

Diamond, White Diamond, Platinum

0.33 Carat Round Cut Cluster 18 Karat White Gold Halo Engagement Diamond Ring
By Hasbani Diamonds
Located in London, GB
This Beautiful 0.33 Carat White Round Cut Diamond Cluster Halo ring is set in 18 Karat White Gold
Category

2010s British Modern Cluster Rings

Materials

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

GIA Certified 2 Carat Round Cut Pave Ring
By Antinori Fine Jewels
Located in Rome, IT
2.02 carat GIA certified diamond with a gorgeously brilliant cut! The beautifully white and
Category

2010s Italian Modern Cocktail Rings

Materials

Diamond, White Diamond, Blue Sapphire, 14k Gold, White Gold

GIA Certified 2 Carat Platinum Round Cut Diamond Halo Engagement Ring
By Cartier
Located in Rome, IT
GIA Certified 2 carat d color flawless clarity excellent symmetry excellent polish none
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

Tiffany & Co. 2 Carat Soleste Round Brilliant Cut Diamond Solitaire Ring
By Tiffany & Co.
Located in Rome, IT
breathtaking 2.27 ct Round Diamond. Crafted with precision and elegance, this ring boasts a total weight of
Category

Early 2000s American Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

2 Carat Three Row Baguette & Round Brilliant Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
& Round Brilliant Cut Diamond 14k White Gold Wedding Band / Anniversary Ring. The ring weighs 8.4 grams
Category

2010s Italian Modern Solitaire Rings

Materials

Diamond, Platinum

10K White Gold 1/2 Carat Round Cut Diamond Teardrop Ring
Located in New York, NY
with a composite of sparkling round cut diamonds that are fixed in a pave setting. So dazzling and
Category

21st Century and Contemporary Indian Contemporary Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, White Gold

EGL Certified 2 Carat Round Cut Yellow Gold Ring
By Antinori Fine Jewels
Located in Rome, IT
detailed filigree setting adorned with diamonds. The generous 2-carat round brilliant cut center diamond
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Yellow Gold

GIA Certified 2 Carat Round Cut Diamond Engagement 18K White Gold Ring
By Antinori Fine Jewels
Located in Rome, IT
central gemstone is a GIA Certified 2 Carat Round Cut Diamond, graded G in color and VS1 in clarity, a
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

GIA Certified 2 Carat Round Brilliant Cut Diamond Platinum Ring MADE IN ITALY
By Antinori Fine Jewels
Located in Rome, IT
GIA Certified 2 Carat Round Brilliant Cut Diamond Platinum Ring
Category

2010s Engagement Rings

Materials

Diamond, White Diamond, Platinum

2 Carat Round Cut Diamond Engagement Ring EGL Certified D VS1
Located in New York, NY
ROUND CUT, FLOATING MARQUE ETERNITY BAND Diamonds: 0.82 carats Size: Can be adjusted to any size.
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

2 Carat Round Cut Diamond Engagement Ring EGL Certified F VVS
Located in New York, NY
HORUS ROUND CUT DIAMOND ENGAGEMENT RING in 14K WHITE GOLD BY MIKE NEKTA Center Diamond: Carat
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

GIA Certified 2 Carat Round Cut Blue Sapphire Pave Ring
By Antinori Fine Jewels
Located in Rome, IT
sapphires. The ring features a large 2.01 carat GIA certified diamond encircled by three elegantly graduated
Category

2010s Italian Modern Cocktail Rings

Materials

Blue Sapphire, Diamond, White Diamond, 14k Gold, White Gold

10k Yellow Gold 1/2 Carat Round and Baguette Diamond Cut Ring
Located in New York, NY
ring. Fashioned in 10kt yellow gold, this diamond ring is enriched with round, and baguette cut
Category

21st Century and Contemporary Indian Contemporary Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, Yellow Gold

2 Carat Round Treated Ruby and Diamond Platinum Ring
Located in New York, NY
2 Carat Round Treated Ruby And Diamond Platinum Ring Size 4 prong set Platinum 7.3 Grams Really
Category

Early 2000s Solitaire Rings

Materials

Diamond, Ruby, Platinum

10K Rose Gold 1/2 Carat Round-Cut Diamond Intertwined Multi-Loop Cocktail Ring
Located in New York, NY
. Loops of rose gold bypass loops embellished with natural, round-cut diamonds in a prong setting. This
Category

21st Century and Contemporary Indian Modern Fashion Rings

Materials

White Diamond, Diamond, 10k Gold, Rose Gold

Platinum Diamond Ring, 900 Round Brilliant Cut 1.65 Carat
Located in Greensboro, NC
Stone Information: Natural Diamonds Solitaire's Carat: 1.54ct (weighed) Accents' Carats: .11ctw Cut
Category

20th Century Unknown Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 2 Carat Cushion Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
, its allure remains unmatched. Enhancing its beauty are 38 Natural Round Brilliant Cut side diamonds
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 2 Carat Cushion Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
, its allure remains unmatched. Enhancing its beauty are 38 Natural Round Brilliant Cut side diamonds
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

10K Rose Gold 1/2 Carat Round-Cut Diamond Intertwined Multi-Loop Cocktail Ring
Located in New York, NY
. Loops of rose gold bypass loops embellished with natural, round-cut diamonds in a prong setting. This
Category

21st Century and Contemporary Indian Modern Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, Rose Gold

10K Rose Gold 1/2 Carat Round-Cut Diamond Intertwined Multi-Loop Cocktail Ring
Located in New York, NY
. Loops of rose gold bypass loops embellished with natural, round-cut diamonds in a prong setting. This
Category

21st Century and Contemporary Indian Contemporary Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, Rose Gold

10K Rose Gold 1/2 Carat Round-Cut Diamond Intertwined Multi-Loop Cocktail Ring
Located in New York, NY
. Loops of rose gold bypass loops embellished with natural, round-cut diamonds in a prong setting. This
Category

21st Century and Contemporary Indian Contemporary Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, Rose Gold

Vivid Diamonds GIA Certified 7.23 Carat Emerald Cut Diamond Engagement Ring
By Vivid Diamonds
Located in Miami, FL
encrusted with round brilliant cut diamonds weighing approximately 1 carat total, E color, VVS clarity. This
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

1.6 Carat Cushion Cut Blue Sapphire Ring with 0.63 Carat Natural Diamond ref1364
By Diamond Town
Located in New York, NY
elegance to this piece. Center: 1.60 carats cushion cut blue sapphire 2 pear shape diamonds total 0.15
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

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

10K Yellow Gold over Silver 1 1/2 Carat Round-Cut Diamond Cocktail Ring
Located in New York, NY
/2 carat of diamonds wrapped in a pear-shaped frame of round diamonds. Additional channel set
Category

21st Century and Contemporary Indian Contemporary Cocktail Rings

Materials

Diamond, White Diamond, 10k Gold, Yellow Gold, Silver, Sterling Silver

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

2010s British Modern Engagement Rings

Materials

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

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
/ SI round brilliant cut diamonds. This Ring has been beautifully set in 18 Karat Gold with white
Category

2010s British Modern Engagement Rings

Materials

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

10k Yellow Gold Over Silver 1 1/2 Carat Round-Cut Diamond Cocktail Ring
Located in New York, NY
/2 carat of diamonds wrapped in a pear-shaped frame of round diamonds. Additional channel set
Category

21st Century and Contemporary Indian Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Gold Plate, Yellow Gold, Sterling Silver, 10k Gold

GIA Certified 2 Carat Cushion Cut Diamond Halo Engagement Ring
By Cartier
Located in Rome, IT
affection. At the heart of this masterpiece is a magnificent GIA certified 2-carat cushion-cut diamond
Category

2010s French Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 2 Carat F Color VS2 Round Cut Triple Ex Diamond 18K Gold Ring
By Antinori Fine Jewels
Located in Rome, IT
This dazzling and substantial 2 carat GIA certified triple excellent diamond is beautifully white
Category

2010s Unknown Modern Engagement Rings

Materials

White Diamond, Diamond, 18k Gold

Tiffany & Co. 3.33 Carat Platinum Round Brilliant Cut Diamond Ring
By Tiffany & Co.
Located in Rome, IT
Tiffany & Co. 3.33 Carat Platinum Round Brilliant Cut Diamond Three Stone Engagement Ring. The
Category

2010s American Modern Engagement Rings

Materials

Diamond, Platinum

10K Yellow Gold 1/2 Carat Round-Cut Multi Row Diamond Split Shank Cocktail Ring
Located in New York, NY
. Crafted with an intricate split shank design, this ring has a total carat weight of 1/2 c.t. and is
Category

21st Century and Contemporary Indian Contemporary Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, Yellow Gold

10K Yellow Gold 1/2 Carat Round-Cut Multi Row Diamond Split Shank Cocktail Ring
Located in New York, NY
. Crafted with an intricate split shank design, this ring has a total carat weight of 1/2 c.t. and is
Category

21st Century and Contemporary Indian Contemporary Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, Yellow Gold

2 1/2 Carat Eternity Round Cut Natural Diamond Band, Shared Prong
Located in Los Angeles, CA
This beautiful 2 1/2 carat eternity band is set in shared prong setting. It consists of all round
Category

2010s Wedding Rings

Materials

Diamond, White Gold, Yellow Gold, Gold, 14k Gold, Rose Gold

10K Yellow Gold 1/2 Carat Round and Baguette cut Diamond Open Space Bypass Ring
Located in New York, NY
open space bypass design, this ring is sure to turn heads. The round and baguette cut diamonds add a
Category

21st Century and Contemporary Indian Modern Fashion Rings

Materials

Diamond, White Diamond, Yellow Gold, 10k Gold

Maci 2 Carat Diamond Round Brilliant Cocktail Ring Certified
Located in New York, NY
come. Earth Mined Diamonds: Carat Weight: 1.94 Carats Shape: Round Brilliant Cut Ring: Total Carats
Category

2010s American Cocktail Rings

Materials

Diamond, 18k Gold, White Gold

10K Two-Toned 1/2 Carat Round and Baguette-Cut Composite Pear Head Diamond Ring
Located in New York, NY
. Crafted in two-toned gold, the warm embrace of this ring sets the stage for 38 natural diamonds to shimmer
Category

21st Century and Contemporary Indian Modern Fashion Rings

Materials

Diamond, White Diamond, 10k Gold, Yellow Gold, White Gold

Tiffany & Co. 2 Round Brilliant Cut Diamond Solitaire Engagement Ring D VS
By Antinori Fine Jewels
Located in Rome, IT
An exquisite Tiffany & Co. round brilliant cut diamond ring 2 carats D COLOR VS1 CLARITY retail
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

2 Carat Round cut Diamond Eternity Band 14k White Gold basket setting
Located in Los Angeles, CA
amazing flattering affect to any finger. Metal: 14k Gold Diamond Total Carats : 2ct Diamond Cut: Round
Category

2010s American Band Rings

Materials

Diamond, 14k Gold, White Gold

2 carat Engagement Ring (Princess cut)
Located in Dublin, IE
: Square Primary Stone Size: 2 carat Approx. Top Dimensions: 8.52 mm Diamond Clarity: VS2 Estimated Set
Category

2010s Irish Modern Engagement Rings

Materials

White Diamond, 14k Gold, White Gold

Round 5.10 Carat Solitaire and Trillion Cut Diamond Ring
Located in METAIRIE, LA
creation. Rare to find a Round Brilliant cut white earth-mined diamond today for sale that exceeds 5 carats
Category

Early 2000s Engagement Rings

Materials

Diamond, 18k Gold, White Gold

4.21 Carat Round Cut Diamond Engagement Ring With Baguettes in 2 Tone 18k Gold
By Gad & Co.
Located in Miami, FL
EGL certified 4.21 carat round cut natural diamond engagement ring. Set in a gorgeous two-tone 18k
Category

Early 2000s North American Art Deco Engagement Rings

Materials

Diamond, Gold, 18k Gold

5.00ct Emerald Cut Blue Topaz 0.38 Carat Diamond Halo 18 Karat White Gold Ring
By Hasbani Diamonds
Located in London, GB
carat white round brilliant diamond halo. This ring has a total gem weight of 5.38 carat. With a quality
Category

2010s British Modern Engagement Rings

Materials

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

14K White Gold Triple Row 2 Carat Natural Diamond Round Cut Wedding Ring Sz 5.75
Located in San Jacinto, CA
14K White Gold Triple Row 2 Carat Natural Diamond Round Cut Wedding Ring This ring is a
Category

2010s Unknown Modern Wedding Rings

Materials

Diamond, 14k Gold, White Gold

14K Yellow and White Gold 1 1/2 Carat Round and Princess-Cut Diamond Band Ring
Located in New York, NY
, framing a single 1/2 cttw round-cut diamond at the center. You will love the way this ring looks on your
Category

21st Century and Contemporary Indian Contemporary Fashion Rings

Materials

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

8.11 Carat Rose Cut Round Brown and White Diamond Cocktail Ring
Located in Great Neck, NY
This stunning Cocktail Ring features a beautiful 8.11 Carat Rose Cut Round Brown Diamond, with a
Category

21st Century and Contemporary Cocktail Rings

Materials

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

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

1 Carat Brilliant Round Center Diamond, 2 Carat 14 Karat White Gold Ring
Located in New York, NY
1 Carat Center Diamond Engagement 14 Karat White Gold Ring 14 K gold Stamped 7.8 Grams Diamond
Category

2010s Engagement Rings

Materials

Diamond, Gold, 14k Gold, White Gold

2.18 Carat Round Diamond Twisted 18 Karat White Gold 4 Prong Engagement Ring
By Hasbani Diamonds
Located in London, GB
ring. Handmade in 18 Karat White Gold, with a total of 2.18 Carat White Diamonds. Set in an open
Category

2010s British Modern Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Tanzanite...

2 Stone Round Cut Bezel Set Diamond Ring in 18k Yellow Gold
By Gad & Co.
Located in Miami, FL
width of 7.3 MM. The round brilliant cut diamonds, with a total carat weight of 0.80, are of VS1-VS2
Category

2010s American Modern Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

AIG certified 0.80 carat sapphires - 0.64 carat round brillant cut diamonds ring
Located in Monte-Carlo, MC
18 carat white gold ring designed with 2 oval-shaped sapphires weighing 0.80 carat and 64 round
Category

Early 2000s Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold

2 Carat GIA Cushion Cut Engagement Ring Set in a Delicate Handmade Setting
By Diamond Scene New York
Located in New York, NY
carat H color SI1 GIA certified cushion cut diamond .50 cts of round brilliant cut diamonds Platinum
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 2 Carat E VS1 Round Diamond Engagement Ring "Madison Jacket"
Located in New York, NY
charm. Taking center stage is a GIA Certified 2 Carat round diamond, radiating a brilliance that mirrors
Category

2010s American Modern Engagement Rings

Materials

Diamond

GIA Certified 2.60 Carat Cushion Cut Blue Sapphire and Diamond Halo Ring ref471
By Diamond Town
Located in New York, NY
weight of 0.82 carats, comprising 10 round natural diamonds totaling 0.57 carats and 2 baguette natural
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

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

EXCEPTIONAL GIA Certified 2 Carat Round Brilliant Cut Diamond F COLOR FLAWLESS
By Antinori Fine Jewels
Located in Rome, IT
color diamond, meticulously fashioned into a mesmerizing round brilliant cut and ensconced in platinum
Category

2010s Unknown Contemporary Three-Stone Rings

Materials

Diamond, Platinum

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2 Carat Round Cut Diamond Ring For Sale on 1stDibs

You are likely to find exactly the 2 carat round cut diamond ring you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from gold, 18k gold and white gold — can elevate any look. In our selection of items, you can find a vintage example as well as a contemporary version. Making the right choice when shopping for a 2 carat round cut diamond ring may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 18th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. A 2 carat round cut diamond ring from Tiffany & Co., Roshe Jewels and Cartier — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for a round cut iteration of this accessory, while there are also oval cut cut and mixed cut cut versions available here, too. Most of our 2 carat round cut diamond ring for sale are for women, but there are 10280 pieces available to browse for men.

How Much is a 2 Carat Round Cut Diamond Ring?

On average, a 2 carat round cut diamond ring at 1stDibs sells for $4,026, while they’re typically $1 on the low end and $2,625,000 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.

Questions About 2 Carat Round Cut Diamond Ring
  • 1stDibs ExpertNovember 8, 2023
    How big a 2-carat diamond with a princess cut is varies from piece to piece. However, the average size is 7 millimeters by 7 millimeters. The measurement is around 9/32 inches, so a 2-carat princess-cut diamond will be just a little over a quarter-inch in size. On 1stDibs, find an assortment of princess-cut diamond jewelry.