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3 Carat Square Engagement Ring

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Peter Suchy GIA Certified 2.04 Carat Square Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Square cut diamond engagement ring. This GIA certified 2.04 carat square emerald cut center diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

EGL 5.05 Carat K/VS2 Cushion Diamond 18K 3-Stone Engagement Ring
By Sebastian Bernard
Located in Los Angeles, CA
gold 3 stone ring with 2 1 carater cushions on the side. Total diamond weight of 2.01 Ct. on the side
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, 18k Gold

1.30 Carat GIA Certified Square Brilliant Cut Diamond Platinum Engagement Ring
Located in New York, NY
This amazing platinum engagement ring centers a unique GIA certified modified square brilliant cut
Category

20th Century Engagement Rings

Materials

Diamond, Platinum

.94 Carat Princess Cut Diamond Engagement Ring, 14 Karat White Gold Square Halo
Located in Greensboro, NC
This ring is a size 6 1/2 - 6 3/4, but it can be re-sized up 2 sizes for a $25 fee. Once a ring is
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, 14k Gold, White Gold

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 Certified 3 Carat Square Radiant Trillion Cut Diamond
By Antinori Fine Jewels
Located in Rome, IT
. Whether worn as an engagement ring or a statement piece for special occasions, this GIA Certified 3 Carat
Category

2010s Unknown Contemporary Engagement Rings

Materials

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

MADE IN ITALY GIA Certified 3 Carat Square Radiant Fancy Yellow Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
GIA Certified Square Radiant Fancy Yellow Diamond Ring
Category

2010s Modern Engagement Rings

Materials

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

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

3 Carat GIA Certificate G Color Cushion Diamond Platinum Bespoke Engagement Ring
By Hasbani Diamonds
Located in London, GB
A bespoke 3.00 carat cushion cut diamond engagement ring with the perfect combination of elegance
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
A bespoke ring with one of the best colors and clarity center diamond, 3.00 carat cushion cut
Category

2010s British Modern Engagement Rings

Materials

Diamond, Platinum

14k Yellow Gold Natural Sapphire & Diamond Engagement Ring, Square Cut & Accent
Located in Toronto, ON
The sapphire and diamond engagement ring that is truly a timeless style for ages and now is
Category

2010s Canadian Art Deco Engagement Rings

Materials

Diamond, Sapphire, 14k Gold, Yellow Gold

GIA 4.75 Carat I/VS1 Cushion Diamond Platinum 3-Stone Engagement Ring W. 2 Pears
By Sebastian Bernard
Located in Los Angeles, CA
Platinum 3 stone Engagement Ring with 2 Pear Shape diamonds the side with Hidden Halo. Total diamond weight
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

White Gold Diamond Square Cluster Ring - 14k Princess .64ctw Engagement
Located in Greensboro, NC
: Square Cluster Measurements Face Height (north to south): 11/32" (8.3mm) Rise Above Finger: 3/16
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 14k Gold, White Gold

1.02ctw VS2 Diamond Square Solitaire Engagement Ring 14k White Gold GIA Sz 7
Located in McLeansville, NC
Gemstone Information: - Natural Diamond - Carats - 1ct Cut - Square Modified Brilliant Color - H
Category

2010s Engagement Rings

Materials

Diamond, White Gold

Platinum 0.52 Carat Hearts on Fire Diamond Engagement Ring
By Hearts On Fire
Located in Boca Raton, FL
VS1-SI1 in clarity. Ring Size: 3 (can be sized) Total Weight: 4.1g (2.7dwt) Measurements: 0.70" x 0.30
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White 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

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

Art Deco 1.05 Carat GIA Cert Diamond Platinum Engagement Ring
Located in New York, NY
is accentuated by dazzling round cut diamond and square cut sapphire accents. The ring is size 4 3/4
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

1.03ct Princess Square Solitaire Diamond Engagement Ring 14k White Gold GIA
Located in McLeansville, NC
Gemstone Information: - Natural Diamond - Carats - 1.03ct Cut - Modified Square Brilliant Color
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Gold

1.03ct Princess Square Solitaire Diamond Engagement Ring 14k White Gold GIA
Located in McLeansville, NC
Gemstone Information: - Natural Diamond - Carats - 1.03ct Cut - Modified Square Brilliant Color
Category

2010s Engagement Rings

Materials

Diamond, White Gold

Art Deco 0.60 Carat Diamond Platinum Engagement Ring
Located in Philadelphia, PA
. Ring Size: 3 3/4 & sizable. Measures: North to South 5.5 mm and sits 5.0 mm high. Total weight: 2.9
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

.25 Carat Art Deco Diamond Platinum Engagement Ring
Located in Atlanta, GA
: .40 Carat Total Weight Cut: Square Step Cut Color: Red, Natural Finger to Top of Stone Measurement: 3
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

Tiffany & Co. True 3 Carat Radiant Brilliant Cut Diamond Ring
By Tiffany & Co.
Located in Rome, IT
Tiffany & Co.True Cut Square Radiant Brilliant Cut Diamond Solitaire Engagement Ring. The ring
Category

2010s American Engagement Rings

Materials

Diamond, White Diamond

GIA Certified 3 Carat Unheated Red Spinel Diamond Platinum Ring
By Antinori Fine Jewels
Located in Rome, IT
beholder with its vibrant play of light. The square radiant cut has been executed with precision, resulting
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Spinel, Platinum

Mid-Century 0.75 CTW Diamond Platinum Buckle Square Form Vintage Engagement Ring
Located in Philadelphia, PA
Circa: 1950s Ring size: 6 3/4 and sizable Measures North to South 5.5 mm and sits 5.5 mm high Total
Category

Vintage 1950s Engagement Rings

Materials

Diamond, White Diamond, Platinum

0.37 Carat Square Cut Blue Sapphire and Round Diamond 18 Karat White Gold Ring
Located in New York, NY
& Grace Ring. The 18k White Gold jewelry boasts Square Cut Prong Setting Genuine Ruby (3 pcs) 0.37 Carat
Category

20th Century Chinese Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Cellini GIA Certified 3 Stone Square Emerald Cut E color Diamond Ring
By Cellini
Located in New York, NY
This classic and enchanting ring features a 1.59 carat square emerald diamond of E color and VVS2
Category

1990s American Engagement Rings

Materials

Diamond, Platinum

Retro 0.63 Carat Diamond Platinum Engagement Ring, circa 1940
Located in Philadelphia, PA
Stamped for platinum Circa: 1940s Ring Size: 5 3/4 & sizable Measures: 5.6 mm wide and sits 6.3 mm high
Category

Vintage 1940s Retro Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified Square Emerald Cut Diamond 4.08 Carat Platinum Ring
Located in Surfside, FL
GIA certified 4.00 carat Natural Fancy Yellow Even, Cut Cornered Square Modified Brilliant Diamond
Category

20th Century Engagement Rings

Materials

Platinum

Diamond Blue Sapphire Art Deco Style Square Shape Engagement Ring in 18K Gold
Located in Bangkok, TH
Mounting the 0.35 carat central diamond are twelve square cut blue sapphires, set in the formation
Category

21st Century and Contemporary Thai Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

French Engagement Ring Sapphire Diamonds White Gold
Located in Vannes, FR
French Engagement Ring Sapphire Diamonds White Gold Sublime 18 carat white gold engagement ring
Category

21st Century and Contemporary French Baroque Engagement Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

Vintage Aquamarine Diamond Trilogy Ring in 3 Carat Aqua
Located in Kendal, GB
stunning spread out across the finger. It would make a unique engagement ring with a trilogy of stones
Category

Late 20th Century Art Deco Engagement Rings

Materials

Aquamarine, Diamond, Platinum

18K Yellow Gold Three Stone 4.84 Carat GIA Cushion Cut Diamond Engagement Ring
Located in Los Angeles, CA
Entirely Handmade Three Stone Engagement Ring Featuring an Amazing Incredibly Made GIA Certified Three
Category

2010s American Art Deco Engagement Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

0.25 Carat Oval Round Princess cut Diamonds Alternative Engagement Ring
By Hi June Parker
Located in New York, NY
fit. Great alternative engagement ring for creative proposals. Inspired by seeing the cross-section
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Yellow Gold, 14k Gold

1.00 Carat Emerald Cut Diamond Solitaire Platinum Engagement Ring EGL
Located in Sherman Oaks, CA
Gorgeous .950 Platinum Solitaire Diamond Engagement Ring Size 5.5 Width of Band = 3 mm at Reverse
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Art Deco 0.97 Carat Diamond Platinum Tiered Shoulder Engagement Ring
Located in Philadelphia, PA
clarity. Stamped for platinum. Circa: 1930s. Ring Size: 5 3/4 & sizable. Measures: North to South 6.5 mm
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

Tiffany & Co. Platinum True Cut Diamond Engagement Ring .59ct TW FVS1
By Tiffany & Co.
Located in New York, NY
Pre-Owned Tiffany & Co. engagement ring from the True collection finely crafted in platinum
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

Exquisite Ring with a Dazzling 1.01 carat Square Emerald Natural Diamond
Located in רמת גן, IL
This exquisite split shank ring features a dazzling 1.01 carat square emerald natural diamond
Category

2010s Israeli Engagement Rings

Materials

Diamond

1.59 Carat Princess Diamond Engagement White Gold Ring EGL, USA
Located in New York, NY
A Timeless Estate Vintage 18k White Gold (stamped) Engagement ring with EGL USA Certified 1.14ct
Category

1990s American Engagement Rings

Materials

Diamond, 18k Gold, White Gold

7.85ct Bi-Colour Tourmaline, Pink & Green Diamond Statement or Engagement Ring
Located in Toronto, Ontario
Shape: Square Cutting Style Crown: Step Cut Cutting Style Pavilion: Step Cut Transparency: Transparent
Category

2010s Canadian Contemporary Engagement Rings

Materials

Diamond, Tourmaline

Square Cut Emerald and Round Brilliant Diamond Engagement Ring in 18K White Gold
Located in Hong Kong, HK
) - 18K white gold - Ring Width: 1.30mm Ready to ship. 2-3 Business days delivery by FedEx / DHL. It
Category

2010s Hong Kong Modern Engagement Rings

Materials

Diamond, Emerald, 18k Gold, White Gold

GIA Certified Unheated Purple Sapphire and Diamond Engagement Ring, 2.14 Carats
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This beautiful purple sapphire and diamond 3-stone ring features a natural, 2.14 carat unheated
Category

21st Century and Contemporary American Artisan Engagement Rings

Materials

Purple Sapphire, Sapphire, Diamond, 18k Gold, Gold, Platinum, Rose Gold

White Gold Engagement Ring, 0.90 Carats Asscher Cut Diamond 'GIA Certified'
Located in MELBOURNE, VIC
Classy art Deco style Fully handmade engagement ring in 18 carat White Gold North-South four claw
Category

2010s Australian Art Deco Engagement Rings

Materials

Diamond, 18k Gold

Art Deco 1.00 Carat Old European Diamond Platinum Stepped Engagement Ring
Located in Philadelphia, PA
weighing collectively approximately 0.18 carat - matched to center. Tested as platinum. Circa: 1930s. Ring
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

Maurice Tishman Art Deco 0.40 Carat Diamond Platinum Scrolled Engagement Ring
Located in Philadelphia, PA
for Maurice Tishman. Circa: 1930s. Ring Size: 3 1/2 & sizable. Measures: North to South 6.5 mm and
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

Vintage 1.45 Carat Sapphire and 0.72 Carat Diamond White Gold Full Eternity Ring
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive 1.45 carat sapphire and 0.72 carat diamond, 18 karat white gold eternity ring
Category

Vintage 1980s Unknown Engagement Rings

Materials

Diamond, Sapphire, White Gold

GIA 3.01 Carat Square Emerald / Asscher Cut Diamond and Sapphire Platinum Ring
By Susana Lang
Located in London, GB
piece. GIA certified 3.01 carat H color VS2 clarity very well cut Square Emerald or Asscher cut diamond
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Sapphire, Platinum

Certified Radiant Cut Diamond and Round Diamond Engagement Ring 18 Carat Gold
Located in Hamilton, AU
Carefully crafted in 18 carat white gold is this vintage inspired diamond ring featuring a
Category

21st Century and Contemporary Australian Contemporary Engagement Rings

Materials

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

Art Deco 0.50 Carat Old European Cut Diamond Platinum Stepped Engagement Ring
Located in Philadelphia, PA
: 1930's. Ring size: 3 and sizable. Measures North to South 6.5 mm and sits 5.0 mm high. Total weight
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

Shreve, Crump & Low GIA Certified 7.03 Ct Fancy Yellow Square Cut Diamond Ring
By Shreve, Crump & Low
Located in Boston, MA
yellow gold 3 stone ring consisting of 1 square emerald cut yellow diamond weighing 7.03 carats with
Category

2010s American Engagement Rings

Materials

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

EGL Certified 1.04 Carat Princess Cut Diamond Halo 18 Karat Gold Engagement Ring
Located in Atlanta, GA
2006 Certified Diamond Halo Engagement Ring - 18 Karat White Gold, Diamonds Features: 1.04 carat
Category

21st Century and Contemporary Unknown Contemporary Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Tiffany & Co. Diamond Solitaire Engagement Ring Platinum 950 Lucida Cut .33ct
By Tiffany & Co.
Located in Greensboro, NC
: 3.9mm (square) Style: Solitaire Measurements Face Height (north to south): 3/16" (4.3mm) Rise Above
Category

Late 20th Century Unknown Engagement Rings

Materials

Diamond, Platinum

1.20 Carat Princess Cut Diamond Split-Shank Engagement Ring 14 Karat White Gold
By Made by Verma Group
Located in Atlanta, GA
1.20 carat Princess Cut Diamond Ring with 0.80 carat total weight Diamond accents - 14 Karat White
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Classic Square Cut Blue Sapphire With Round Diamond 18 Karat White Gold Ring
Located in New York, NY
& Grace Ring. The 18k White Gold jewelry boasts Square Cut Prong Setting Genuine Blue Sapphire (3 pcs
Category

20th Century Chinese Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Art Deco 0.92 CTW Diamond Platinum Lotus Vintage Engagement Ring
Located in Philadelphia, PA
0.10 carat total - eye clean and bright Tested as platinum Circa: 1930s Ring size: 4 3/4 and sizable
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

1CT GH-I1 Natural Diamond Halo Engagement Ring 14K White Gold, Size 8.5
Located in Los Angeles, CA
Cushion Cut 1 CT GH-I1 Natural Diamond Halo Engagement Ring for Women 14K Gold Specification
Category

21st Century and Contemporary American Artist Engagement Rings

Materials

Diamond, 14k Gold, White Gold

1CT GH-I1 Natural Diamond Halo Engagement Ring 14K White Gold, Size 7.5
Located in Los Angeles, CA
Cushion Cut 1 CT GH-I1 Natural Diamond Halo Engagement Ring for Women 14K Gold Specification
Category

21st Century and Contemporary American Artist Engagement Rings

Materials

Diamond, 14k Gold, White Gold

1CT GH-I1 Natural Diamond Halo Engagement Ring 14K White Gold, Size 6.5
Located in Los Angeles, CA
Cushion Cut 1 CT GH-I1 Natural Diamond Halo Engagement Ring for Women 14K Gold Specification
Category

21st Century and Contemporary American Artist Engagement Rings

Materials

Diamond, 14k Gold, White Gold

1CT GH-I1 Natural Diamond Halo Engagement Ring 14K White Gold, Size 5.5
Located in Los Angeles, CA
Cushion Cut 1 CT GH-I1 Natural Diamond Halo Engagement Ring for Women 14K Gold Specification
Category

21st Century and Contemporary American Artist Engagement Rings

Materials

Diamond, 14k Gold, White Gold

1CT GH-I1 Natural Diamond Halo Engagement Ring 14K White Gold, Size 4.5
Located in Los Angeles, CA
Cushion Cut 1 CT GH-I1 Natural Diamond Halo Engagement Ring for Women 14K Gold Specification
Category

21st Century and Contemporary American Artist Engagement Rings

Materials

Diamond, 14k Gold, White Gold

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3 Carat Square Engagement Ring For Sale on 1stDibs

Surely you’ll find the exact 3 carat square engagement 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. You can easily find a 85 antique edition and 194 modern creations to choose from as well. You’re likely to find the perfect 3 carat square engagement ring 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. There have been many well-made iterations of the classic 3 carat square engagement ring over the years, but those made by Antinori Fine Jewels, Tiffany & Co. and TJD are often thought to be among the most beautiful. See these pages for a square cut iteration of this accessory, while there are also emerald cut cut and round cut cut versions available here, too. Most of our 3 carat square engagement ring for sale are for women, but there are 75 pieces available to browse for men.

How Much is a 3 Carat Square Engagement Ring?

The price for a 3 carat square engagement ring starts at $400 and tops out at $693,000 with these rings, on average, selling for $10,023.

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.