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4 Carat Princess Cut Diamond Ring

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Vintage 5.12 Carat Diamond and Platinum Solitaire Ring
Located in Jesmond, Newcastle Upon Tyne
ring has been crafted in platinum. The ring displays a stunning principal 4 carat princess cut diamond
Category

1990s Unknown Solitaire Rings

Materials

Diamond, Platinum

1/4 Carat Princess Cut Diamond Gold Coil Ring
Located in Rutherford, NJ
Gold- 3.40 gms Diamond- 0.23 carats Diamond Colour: G-H Diamond Clarity: SI Ring Weight: 3.45 gms
Category

21st Century and Contemporary Asian Band Rings

Materials

Diamond, Gold, 14k Gold, 18k Gold

Leo Princess Cut Diamond 0.98 Carat White Gold Four Prong Solitaire Ring
By The Leo Diamond
Located in San Diego, CA
(sizable) Total Carat Weight: 0.98 CTS Diamond Shape: LEO Princess Diamond Color & Clarity: I / SI1
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

4 Carat Princess Cut Diamond Eternity Band Certified
Located in New York, NY
Eternity Band Diamond: Carat Weight: 4.16 Carats Number of Diamonds: 21 Style: Princess Cut
Category

2010s American Band Rings

Materials

Diamond, 18k Gold, White Gold

0.95 Carat Princess Cut Diamond Modern Ring
Located in beverly hills, CA
A 0.95 carat princess cut diamond with G color and VS1 clarity radiates from within a modern
Category

21st Century and Contemporary Modern Engagement Rings

Materials

Diamond, Platinum

Platinum Diamond Tapered Band - Princess Cut 1.00ctw Ring Size 4
Located in Greensboro, NC
Size: 4 Metal Content: Platinum Stone Information Natural Diamonds Carat(s): 1 ctw Cut: Princess
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Platinum

Leo Diamond Princess Cut Solitaire Ring 1.00 Carat G SI2 14 Karat White Gold
By The Leo Diamond
Located in San Diego, CA
THE LEO DIAMOND ENGAGEMENT RING Style: 4-Prong Solitaire Engagement Ring Serial Number: LEO
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

0.15 Carat Princess Cut Diamond Cathedral Engagement Ring
Located in Sherman Oaks, CA
/4 Contains: One prong set princess cut diamond Measures 3.10 x 3.00 x 2.04 mm (depth est
Category

Early 2000s American Modern Engagement Rings

Materials

Diamond, 14k Gold

2.03 Carat Princess Cut Solitaire Diamond Engagement Ring 4 Prong 14k White Gold
Located in Aventura, FL
, The Diamond Is Appraised by Gia Appraiser, It Has 2.03 Ct Princess Cut Diamond of H Color and Si1
Category

21st Century and Contemporary American Modernist Solitaire Rings

Materials

Diamond, 14k Gold

1.00 Carat Diamond Princess Cut Gold Engagement Ring
Located in Stamford, CT
Vintage 1960s diamond 14k yellow and white gold engagement ring. Princess cut center Diamonds with
Category

Mid-20th Century Engagement Rings

Materials

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

1.03 Carat Princess Cut Diamond 18 Karat Gents Ring
By Sebastian Bernard
Located in Los Angeles, CA
center, It has a cluster of 4 pieces of perfectly matched 3.4 mm princess cut diamonds (Total Weight 1.03
Category

2010s American Bridal Rings

Materials

Diamond, 18k Gold

GIA 4 Carat Princess Cut Diamond with trillion Diamond FLAWLESS D COLOR
By Antinori Fine Jewels
Located in Rome, IT
This stunning ring features a magnificent 4-carat princess-cut diamond at its center, exuding
Category

2010s Unknown Modern Engagement Rings

Materials

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

1.02 Carat Princess-Cut Diamond Sapphire Platinum Ring
Located in Beverly Hills, CA
A chic and elegant platinum ring featuring a 1.02 carat princess-cut diamond! It has a G-H color
Category

21st Century and Contemporary American Fashion Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

14K White Gold 1 1/4 Carat Princess Cut Diamond Channel Set Engagement Ring
Located in New York, NY
Adorn yourself with this bold 14k white gold ring. A sparkling 3/4 cttw princess-cut diamond sits
Category

21st Century and Contemporary Indian Contemporary Bridal Rings

Materials

White Diamond, Diamond, 14k Gold, White Gold

1.21ct Princess Cut Diamond Ring
Located in San Francisco, CA
The don't call it a "princess" cut for nothing! This exceptional 1.21 carat diamond is expertly set
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

GIA 1.28 carats Princess-Cut Diamond Platinum Engagement Ring
Located in Miami, FL
1 genuine princess cut natural diamond vibrant approx 1.01ct, GIA certified I color, VS2 clarity
Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

Diamond, Platinum

8 Carat Princess Cut Halo Diamond Engagement Ring Certified
Located in New York, NY
Center Diamond: Carat Weight: 6.32 Carats Style: Princess Cut - Feather Filled- Spl Care Req'd
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

3 Carat Princess Cut Diamond Engagement Ring Certified G VS2
Located in New York, NY
Center Earth Mined Diamond: Carat Weight: 2.06 Carats Color: G Clarity: VS2* Style: Princess Cut
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

GIA .99 Carat Princess Cut Diamond Platinum Three-Stone Engagement Ring
Located in Stamford, CT
Diamond engagement ring. GIA certified .99ct princess cut diamond set in a platinum three stone
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

4 Carat Princess Cut Diamond Engagement Ring GIA Certified Y TO Z Range VS2
Located in New York, NY
RIKER -HALO PRINCESS CUT YELLOW DIAMOND ENGAGEMENT RING BY MIKE NEKTA GIA CERTIFIED Center Diamond
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, 18k Gold, Yellow Gold

Leo Diamond Solitaire Engagement Ring Princess Cut 0.71ct H I1 14 Karat Gold
By The Leo Diamond
Located in San Diego, CA
: 14KT White Gold Size: 7 - sizable Total Carat Weight: 0.71 CT Diamond Shape: THE LEO PRINCESS CUT
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Contemporary 2.70 Carats Princess Cut Diamond Platinum Wedding Band Ring
Located in Philadelphia, PA
Band ring features princess cut diamonds channel set fully around. Weighing approximately 2.70
Category

21st Century and Contemporary Contemporary Band Rings

Materials

Diamond, White Diamond, Platinum

1.00 Carat Princess Diamond 18 Karat Gold Solitaire Hasbani Engagement Ring
By Hasbani Diamonds
Located in London, GB
A modern classic engagement ring. Handmade in 18 Karat Gold, with 1.00 Carat White Diamond. Set in
Category

2010s British Modern Engagement Rings

Materials

Pink Diamond, Black Diamond, Emerald, Garnet, Multi-gemstone, Peridot, R...

0.25 Carat Princess Diamond 18 Karat Gold Solitaire Hasbani Engagement Ring
By Hasbani Diamonds
Located in London, GB
A modern classic engagement ring. Handmade in 18 Karat Gold, with a 0.25 Carat White Diamond. Set
Category

2010s British Modern Engagement Rings

Materials

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

Leo Diamond Engagement Ring Princess Cut 0.75 cts I SI1 14k White Gold
By The Leo Diamond
Located in San Diego, CA
The Leo Diamond Style: 4 Prong Solitaire Artisan Ring Serial Number: LEO 142600S Metal: 14KT
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

GIA Certified 1.04 Carats Princess Cut Diamond Three-Stone Engagement Ring
By Roman Malakov
Located in New York, NY
This luxurious engagement ring features a 1.04 carats princess cut diamond center stone flanked by
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

0.50 Carat Princess Diamond 18 Karat Gold Solitaire Hasbani Engagement Ring
By Hasbani Diamonds
Located in London, GB
A modern classic engagement ring. Handmade in 18 Karat Gold, with a 0.50 Carat White Diamond. Set
Category

2010s British Modern Engagement Rings

Materials

Topaz, Tourmaline, Amethyst, Aquamarine, Citrine, Diamond, White Diamond...

0.75 Carat Princess Diamond 18 Karat Gold Solitaire Hasbani Engagement Ring
By Hasbani Diamonds
Located in London, GB
A modern classic engagement ring. Handmade in 18 Karat Gold, with a 0.75 Carat White Diamond. Set
Category

2010s British Modern Engagement Rings

Materials

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

1.95 Carat Brown Diamond Princess Cut Diamond Platinum Engagement Ring
By DGI
Located in Los Angeles, CA
This ring has a Asscher Cut Brown Diamond that weighs 1.10 Carats with a VS clarity. It has 9
Category

2010s American Contemporary Engagement Rings

Materials

Brown Diamond, Platinum

Leo Princess Cut Diamond Solitaire Engagement Ring 0.83 CT I SI1 14k White Gold
By The Leo Diamond
Located in San Diego, CA
White Gold & Platinum 950 Size: 7.5 - sizable Total Carat Weight: 0.83 CTS Diamond Shape: Princess
Category

2010s American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Roman Malakov 0.39 Carat Princess Cut Diamond Side Stone Engagement Ring
By Roman Malakov
Located in New York, NY
A unique and lustrous engagement ring showcasing a simple 0.39 carat princess cut diamond, accented
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Leo Diamond Engagement Ring Princess 0.72 Carat H SI1 14 Karat White Gold
By The Leo Diamond
Located in San Diego, CA
: 14K White Gold Size: 5 - sizable Total Carat Weight: 0.72 CT Diamond Shape: THE LEO PRINCESS CUT
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, 14k Gold, White Gold

18k Gold 4 Carat Princess Cut Diamond Eternity Band F-G Color VS1 Clarity
Located in Los Angeles, CA
carats. A shimmering spectacle of channel set princess cut plus round cut diamonds are pave set for a
Category

2010s American Modern Band Rings

Materials

Diamond, 18k Gold

Princess Cut Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
A fine 0.72 carat princess cut diamond solitaire ring in platinum; part of our European Gemological
Category

1990s British Contemporary Solitaire Rings

Materials

Diamond, Platinum

1.27 Carat Diamond Ring G/IF 14k White Gold, 7 Princess Cut Diamonds
Located in Darmstadt, DE
1.27 Carat Diamond Ring G/IF 14k White Gold, 7 Princess Cut Diamonds High Gloss Finish. Fine Hand
Category

2010s German Modern Cocktail Rings

Materials

Diamond, 14k Gold, White Gold

GIA 1.00 carat Princess cut Halo Diamond Ring in 18k White Gold
Located in La Jolla, CA
GIA Certified 1.00 carat Princess cut Diamond Halo Ring GIA Certified Diamond Halo Ring features
Category

21st Century and Contemporary North American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

0.25 Carat Total Princess Cut Diamonds and White Gold Cocktail Ring
Located in Atlanta, GA
Princess cut Diamond Ring - 14 karat White Gold, Diamonds Features: 0.25 carat total Princess cut
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, 14k Gold, White Gold

2.65ct Natural Princess Cut Diamond Engagement Ring In 4 Prong 14K White Gold
Located in Aventura, FL
This dazzling 2.65 Natural Princess Cut Diamond Engagement Ring in 14k White Gold is a dream come
Category

21st Century and Contemporary American Modernist Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Ella Gafter Princess Cut Diamond Cocktail Ring
By Ella Gafter
Located in New York, NY
This diamond cocktail ring features a geometric design of calibrated princess-cut diamonds for a
Category

21st Century and Contemporary Italian Artist Cocktail Rings

Materials

White Diamond, Diamond, 18k Gold, White Gold

Yellow Gold Diamond Men's Ring - 14k Princess Cut .25ct Solitaire Sz 10 1/4
Located in Greensboro, NC
Size: 10 1/4 Metal Content: 14k Yellow Gold Stone Information Natural Diamond Carat(s): .25ct
Category

21st Century and Contemporary Band Rings

Materials

Diamond, 14k Gold, Yellow Gold

Modern Princess Cut Diamond and 18 Carat White Gold Solitaire Ring
Located in Chipping Campden, GB
The design of the ring is so simple and beautiful. The princess cut diamond measures 35pts and is
Category

Vintage 1980s British Modern Solitaire Rings

Materials

Diamond, White Gold

Retro-Era 1.60 Carat Princess-Cut Diamond 14K White Gold Engagement Ring
Located in Miami, FL
Lovely vintage diamond engagement ring centering a roughly 1.60 Carat Princess-Cut Diamonds
Category

20th Century Retro Engagement Rings

Materials

Diamond, White Diamond, White Gold

Princess-Cut Diamond Engagement Ring with Baguette Diamond Details
Located in NEW ORLEANS, LA
, Color: H-I, Clarity: SI2 Other Diamonds Cut: 2 Princess and 4 Baguette, Combined Weight: 0.64 carat
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 14k Gold, White Gold

1/2 Carat Princess & Emerald Cut Diamond Bezel Twin Ring
Located in Rutherford, NJ
Gold- 1.52 gms Diamond- 0.47 carats Diamond Colour: G-H Diamond Clarity: SI Ring Weight: 1.61 gms
Category

21st Century and Contemporary Indian Band Rings

Materials

Diamond, 14k Gold, 18k Gold

.94 Carat Princess Cut Diamond Engagement Ring, 14 Karat White Gold Square Halo
Located in Greensboro, NC
Diamonds Clarity: I2 (solitaire); SI2 - I1 (accents) Color: G Cuts: Princess (solitaire) & Round
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, 14k Gold, White Gold

White Gold Princess Cut Diamond Halo Engagement Ring
Located in San Francisco, CA
designer Neil Lane. This 14 karat white gold beauty features a .69 carat Princess Cut diamond set in a halo
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, White Gold

TJD 0.30 Carat Princess Cut Diamond 18 Karat Yellow Gold Men's Ring
By TJD
Located in New York, NY
. These band ring are studded with 4 princess Cut natural diamonds in 0.30 carat. The white diamonds are
Category

2010s Indian Contemporary Wedding Rings

Materials

Diamond, Yellow Gold, 18k Gold

White Gold Diamond Solitaire Ring, 14 Karat Princess Cut 1.02 Carat EGL, USA
Located in Greensboro, NC
Diamond Clarity: I1 Color: H - I Cut: Princess Carat: 1.02ct Solitaire’s EGL USA Report Number: US
Category

20th Century Unknown Solitaire Rings

Materials

Diamond, 14k Gold, White Gold

1.50 Carat Total Weight Princess Cut Diamond Platinum Eternity Band
Located in Houston, TX
This beautiful Eternity band features 30 Princess cut natural diamonds weighing approx. 1.50 carats
Category

21st Century and Contemporary American Contemporary Band Rings

Materials

Diamond, Platinum

Princess Cut Diamond and Yellow Gold Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
A 0.62 carat princess cut diamond 18 karat yellow gold, 18 karat white gold set, solitaire ring
Category

Early 2000s Unknown Contemporary Solitaire Rings

Materials

Diamond, 18k Gold, Yellow Gold

Beauvince Sundance Ring 7.02 Carat Princess Cut Light Yellow ST VS2 GIA Diamond
By Beauvince Jewelry
Located in New York, NY
Diamond Shape: Princess Cut Center Diamond Weight: 7.02 ct Diamond Color: Light Yellow (ST) Diamond
Category

2010s Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

14 Karat White Gold Princess Cut Diamond Eternity Ring with 3.50 Carat
By Gregory Mikaelian & Sons, Inc.
Located in Los Angeles, CA
14k white gold ladies princess cut diamond eternity, containing 25 princess cut diamonds; color "G
Category

2010s American Art Deco Wedding Rings

Materials

Diamond, 14k Gold

Platinum Diamond Engagement Ring - 950 Princess Cut 1.02ctw Size 6
Located in Greensboro, NC
(weighed) Cut: Princess Color: F Clarity: I1 Natural Diamond Accents Carat(s): .48ctw Cut: Baguette Color
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

White Gold Diamond Cluster Band - 14k Princess .72ctw Ring Sz 4 3/4
Located in Greensboro, NC
Size: 4 3/4 Metal Content: 14k White Gold Stone Information Natural Diamonds Carat(s): .72ctw
Category

21st Century and Contemporary Band Rings

Materials

Diamond, 14k Gold, White Gold

Platinum Diamond Solitaire Engagement Ring - Princess Cut .45ct GIA Cathedral
Located in Greensboro, NC
Information Natural Diamond Carat(s): .45ct Cut: Princess Color: E Clarity: VS1 Certified by: GIA Report
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Princess Cut Diamond Engagement Ring in White Gold
Located in Wailea, HI
One Princess Cut Diamond Weighing .55 Carats Approximately GHI SI [bright with no imperfections
Category

Late 20th Century Unknown Modern Engagement Rings

Materials

Diamond, 14k Gold, White Gold

GIA Certified 0.92 Carat J VS1 Princess Cut Diamond Single Stone/Solitaire Ring
Located in London, GB
Single stone diamond ring. A square modified brilliant (princess) cut white diamond set in a
Category

2010s British Modern Engagement Rings

Materials

Diamond, Platinum

14K White Gold Princess Cut Diamond Ring .88ct, 3.9g
Located in Laguna Beach, CA
center diamond is a princess cut and measures .88 carats using a leveridge gage, G to H color, i1 clarity
Category

20th Century Engagement Rings

Materials

Diamond, White Gold

0.05 Carat Princess Cut Diamond Ring G/IF 14k Gold, Blue/Grey/White Enamel
Located in Darmstadt, DE
0.05 Carat Diamond Ring G/IF 14k White Gold, Blue/Grey/White Enamel Solitaire Princess Cut
Category

2010s German Modern Cocktail Rings

Materials

Diamond, Gold, 14k Gold, Enamel

TJD 0.30 Carat Princess Cut Diamond 14KT Yellow Gold Men's Wedding Band Ring
By TJD
Located in New York, NY
. These band ring are studded with 4 princess Cut natural diamonds in 0.30 carat. The white diamonds are
Category

2010s Indian Contemporary Wedding Rings

Materials

Diamond, 14k Gold, Yellow Gold

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4 Carat Princess Cut Diamond Ring For Sale on 1stDibs

Surely you’ll find the exact 4 carat princess cut diamond ring you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Each design created in this style — which was crafted with great care and often made from Gold, White Gold and Platinum — can elevate any look. In our selection of items, you can find a vintage example as well as a contemporary version. You’re likely to find the perfect 4 carat princess cut diamond ring among the distinctive items we have available, which includes versions made as long ago as the 20th Century as well as those produced as recently as the 21st Century. As it relates to this specific piece, our collection includes designs that are universally popular, but .5 Carat and 1 Carat carat weights, specifically, are sought with frequency. Creating a 4 carat princess cut diamond ring has been a part of the legacy of many jewelers, but those produced by Mark Broumand, TJD and Roman Malakov are consistently popular. Today, if you’re looking for a princess cut version of this piece and are unable to find the perfect match, our selection also includes round cut and baguette cut alternatives. When shopping for a 4 carat princess cut diamond ring, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a 4 Carat Princess Cut Diamond Ring?

The price for a 4 carat princess cut diamond ring starts at $495 and tops out at $349,200 with these rings, on average, selling for $4,995.

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 4 Carat Princess Cut Diamond Ring
  • 1stDibs ExpertSeptember 28, 2021
    A princess cut diamond ring is a genre of the diamond cuts often used in engagement rings. Possessing the technical name square modified brilliant, these rings are peculiarly crafted into a square or a rectangle shape, giving it an exquisite look of an inverted pyramid with four beveled sides. Shop a range of antique and vintage princess cut diamond rings on 1stDibs.
  • 1stDibs ExpertSeptember 28, 2021
    Like with most diamond products, the price of a 1-carat princess cut diamond can range dramatically. On 1stDibs, find 1-carat princess cut diamond rings, earrings, necklaces and bracelets starting at $999 to $16,500.
  • 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.