Skip to main content

Square Platinum Ring

to
55
483
81
49
37
23
435
40
77
76
50
2
3
210
271
1
10
40
33
10
14
8
5
8
8
1
342
140
4
306
31
29
21
20
to
56
50
9
7
4
110
95
33
17
9
2
484
2
379
90
0.61 Carat Emerald & Diamond Square Shape Ring in 14K White Gold Size 6.5
0.61 Carat Emerald & Diamond Square Shape Ring in 14K White Gold Size 6.5

0.61 Carat Emerald & Diamond Square Shape Ring in 14K White Gold Size 6.5

Located in Miami, FL

0.61 Carat Emerald and Diamond Ring in 14K White Gold. Beautiful vintage-style Emerald ring with round-cut diamonds surrounding the deep green center stone in a halo shape and all al...

Category

21st Century and Contemporary Modern Engagement Rings

Materials

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

Small Square Baguette Diamond 14K (or 18k upon request)White Gold Open Wrap Ring
Small Square Baguette Diamond 14K (or 18k upon request)White Gold Open Wrap Ring

Small Square Baguette Diamond 14K (or 18k upon request)White Gold Open Wrap Ring

Located in Los Angeles, CA

The Small Square Baguette Diamond 14K White Gold Open Wrap Ring is a chic and modern design crafted in 14K white gold. This elegant ring features 42 dazzling diamonds totaling 0.20 c...

Category

2010s American Modern Fashion Rings

Materials

14k Gold, Rose Gold, White Gold, Yellow Gold, Platinum

Art Deco Sapphire and Diamond Platinum Eternity Band
Art Deco Sapphire and Diamond Platinum Eternity Band

Art Deco Sapphire and Diamond Platinum Eternity Band

Located in Chipping Campden, GB

This sweet diamond and blue sapphire eternity has the stones set within the platinum band. The stones are grouped in collections of three diamonds and three sapphires. The diamonds m...

Category

Vintage 1910s British Art Deco Band Rings

Materials

Diamond, Sapphire, Platinum

Vintage Diamond Wedding Band. 1.80ct Carre Diamond Wedding Band Platinum 2.7mm
Vintage Diamond Wedding Band. 1.80ct Carre Diamond Wedding Band Platinum 2.7mm

Vintage Diamond Wedding Band. 1.80ct Carre Diamond Wedding Band Platinum 2.7mm

Located in New York, NY

Jewelry Type: Wedding Band / Eternity Band Primary Gemstone: Diamond Total Diamond Weight: Approx. 1.75 Carats Setting: Channel Set Metal: Platinum Era: Circa 1950 (Mid-Century) Widt...

Category

Vintage 1950s Art Deco Wedding Rings

Materials

Diamond, Platinum

Tiffany & Co Lucida Diamond Engagement Ring 0.91ct
Tiffany & Co Lucida Diamond Engagement Ring 0.91ct

Tiffany & Co Lucida Diamond Engagement Ring 0.91ct

By Tiffany & Co.

Located in SYDNEY, NSW

A Tiffany & Co Solitaire Lucida Cut-Cornered Square Mixed Cut Diamond Ring, four claw set in platinum on a 3.1 to 2.5mm tapered band.

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

1.11 Carat G/SI2 Princess Cut Diamond Pave Halo Set in Platinum Engagement Ring
1.11 Carat G/SI2 Princess Cut Diamond Pave Halo Set in Platinum Engagement Ring

1.11 Carat G/SI2 Princess Cut Diamond Pave Halo Set in Platinum Engagement Ring

Located in Miami, FL

Natural 1.11 carat princess cut diamond in G color and SI2 clarity is set in a platinum 950 square halo engagement ring with 0.23 carats of round brilliant pave diamonds lining the h...

Category

21st Century and Contemporary Modern Engagement Rings

Materials

Diamond, Platinum

Art Deco Sapphire Wedding Band. 2.50ct Carre Cut Sapphire Eternity Band Platinum
Art Deco Sapphire Wedding Band. 2.50ct Carre Cut Sapphire Eternity Band Platinum

Art Deco Sapphire Wedding Band. 2.50ct Carre Cut Sapphire Eternity Band Platinum

Located in New York, NY

Primary Stone: Sapphire Total Sapphire Weight: Approximately 2.50 Carats Cut: Carré Cut Jewelry Type: Wedding Band / Eternity Ring Wedding Band Style: Eternity Band Era: Art Deco, C...

Category

Vintage 1930s Art Deco Wedding Rings

Materials

Sapphire, Platinum

Antique Art Deco Platinum Carre Cut Diamond Eternity Wedding Band - Size 5 1/2
Antique Art Deco Platinum Carre Cut Diamond Eternity Wedding Band - Size 5 1/2

Antique Art Deco Platinum Carre Cut Diamond Eternity Wedding Band - Size 5 1/2

Located in Great Neck, NY

Beautiful Antique Art Deco Platinum Carre Cut Diamond Eternity Wedding Band - Size 5 1/2. This gorgeous Art Deco Carre cut eternity diamond band is crafted in platinum. This gorgeous...

Category

Vintage 1930s Art Deco Wedding Rings

Materials

Diamond, Platinum

Vintage Estate Platinum Carre Cut Diamond Engraved Wedding Band - Size 6 1/4
Vintage Estate Platinum Carre Cut Diamond Engraved Wedding Band - Size 6 1/4

Vintage Estate Platinum Carre Cut Diamond Engraved Wedding Band - Size 6 1/4

Located in Great Neck, NY

Beautiful Vintage Estate Platinum Carre Cut Diamond Engraved Wedding Band - Size 6 1/4. This gorgeous vintage estate Carre cut diamond band is crafted in platinum. This ring features...

Category

Vintage 1960s Retro Wedding Rings

Materials

Diamond, Platinum

Antique Ruby Wedding Band. Carre Cut Ruby Eternity Band Platinum Art Deco 1920
Antique Ruby Wedding Band. Carre Cut Ruby Eternity Band Platinum Art Deco 1920

Antique Ruby Wedding Band. Carre Cut Ruby Eternity Band Platinum Art Deco 1920

Located in New York, NY

Primary Stone: Ruby Primary Stone Weight: Approx. 2.80 Carats Primary Stone Cut: Care Cut Jewelry Type: Ring / Wedding Band Jewelry Style: Eternity Band, Art Deco Band Metal: Platin...

Category

Vintage 1920s Art Deco Band Rings

Materials

Ruby, Platinum

3.80 Carat Carré Cut Diamond Full-Eternity Ring
3.80 Carat Carré Cut Diamond Full-Eternity Ring

3.80 Carat Carré Cut Diamond Full-Eternity Ring

Located in London, GB

Here we have a sleek and stylish full-eternity ring. This rare piece has been crafted from platinum and set with a continuous row of bright white carré-cut diamonds encircling the en...

Category

Vintage 1950s Band Rings

Materials

Diamond, Platinum

Carre Cut 1.50 Ct Channel Set Diamond Wedding Eternity Band Set in Platinum
Carre Cut 1.50 Ct Channel Set Diamond Wedding Eternity Band Set in Platinum

Carre Cut 1.50 Ct Channel Set Diamond Wedding Eternity Band Set in Platinum

By Simon Ardem

Located in New York, NY

Diamond Eternity Band set in Platinum, featuring 35 beautifully matched Carre cut diamonds in a channel setting. This classic piece has the following specifications; Color and Clarit...

Category

21st Century and Contemporary American Contemporary Band Rings

Materials

Diamond, Platinum

8.12 Carat Square Emerald Cut Diamond Eternity Band
8.12 Carat Square Emerald Cut Diamond Eternity Band

8.12 Carat Square Emerald Cut Diamond Eternity Band

Located in New York, NY

Finely crafted in platinum with 16 Square Emerald cut Diamonds weighing a total of approximately 8.12 carats, E color, VS1-VS2 clarity. 6mm wide Size 5 1/2

Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Platinum

Alternating Diamond & Emerald Five Stone Band Platinum in Stock
Alternating Diamond & Emerald Five Stone Band Platinum in Stock

Alternating Diamond & Emerald Five Stone Band Platinum in Stock

Located in Boca Raton, FL

Material: Platinum Gemstone details: Approx. 0.50ctw fo Emerald gemstones Diamond details: Approx. 0.20ctw of princess cut Diamonds. Diamonds are G/H in color and VS in clarity Ring ...

Category

21st Century and Contemporary American Band Rings

Materials

Diamond, White Diamond, Emerald, Platinum

Art-Deco Platinum Burmese Ruby, Sapphire Diamond Reversible Swivel Eternity Band
Art-Deco Platinum Burmese Ruby, Sapphire Diamond Reversible Swivel Eternity Band

Art-Deco Platinum Burmese Ruby, Sapphire Diamond Reversible Swivel Eternity Band

Located in MELBOURNE, AU

This rarely seen reversible swivel eternity ring (or a convertible / rotating flip ring) dates back to an Art-Deco c1930’s era, yet it’s in remarkable original condition It fea...

Category

Vintage 1930s Australian Art Deco Cluster Rings

Materials

Diamond, Ruby, Sapphire, Platinum

Vintage Ruby Wedding Band. Calibre Cut Ruby Channel Set Eternity Band Platinum
Vintage Ruby Wedding Band. Calibre Cut Ruby Channel Set Eternity Band Platinum

Vintage Ruby Wedding Band. Calibre Cut Ruby Channel Set Eternity Band Platinum

Located in New York, NY

Primary Stone: Ruby Primary Stone Cut: Calibre Cut Jewelry Type: Eternity Band Metal: Platinum Ring Size: 4.5 US, This exquisite vintage eternity band showcases a timeless design...

Category

21st Century and Contemporary Unknown Art Deco Wedding Rings

Materials

Ruby, Platinum

Art Deco Style Blue Sapphire and Old Cut Diamond Target Ring in Platinum
Art Deco Style Blue Sapphire and Old Cut Diamond Target Ring in Platinum

Art Deco Style Blue Sapphire and Old Cut Diamond Target Ring in Platinum

Located in London, GB

A beautiful Art Deco style old cut diamond and blue sapphire squared target ring set in platinum. The ring is centrally set with a sparkly 0.96 carat old cut diamond which is mille ...

Category

Early 2000s European Cocktail Rings

Materials

Diamond, Blue Sapphire, Platinum

5.60 Carat Square Emerald Cut Diamond Eternity Band
5.60 Carat Square Emerald Cut Diamond Eternity Band

5.60 Carat Square Emerald Cut Diamond Eternity Band

Located in New York, NY

Finely crafted in platinum with 23 Square Emerald cut Diamonds weighing a total of approximately 5.60 carats, G-H color, VS1-SI1 clarity. 5mm wide Size 5 3/4

Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Platinum

Tiffany & Co Lucida Diamond Eternity Full Circle Band Ring
Tiffany & Co Lucida Diamond Eternity Full Circle Band Ring

Tiffany & Co Lucida Diamond Eternity Full Circle Band Ring

By Tiffany & Co.

Located in Bethesda, MD

Tiffany & Co's Lucida Diamond Platinum Eternity Band features a continuous circle of brilliant diamonds set in precious metal, creating timeless sparkle from every angle. This size 5...

Category

2010s Band Rings

Materials

Diamond, Platinum

Boodles 2.00ct Diamond Half Eternity Ring
Boodles 2.00ct Diamond Half Eternity Ring

Boodles 2.00ct Diamond Half Eternity Ring

By Boodles

Located in London, GB

A sublime half eternity ring created by Boodles, features ten stunning carre cut diamonds. These diamonds have been channel set into a platinum band and are all of excellent quality....

Category

21st Century and Contemporary Unknown Fashion Rings

Materials

Diamond, Platinum

Cartier Carre Cut Diamond Eternity Ring Size J (49)
Cartier Carre Cut Diamond Eternity Ring Size J (49)

Cartier Carre Cut Diamond Eternity Ring Size J (49)

By Cartier

Located in London, GB

Here we have a truly stunning eternity ring from the world renowned luxury jewellery house of Cartier. This piece showcases 20 bright white carré cut diamonds which have been expertl...

Category

21st Century and Contemporary Band Rings

Materials

Diamond, Platinum

Antique Art Deco Platinum Carre Cut White Sapphire Eternity Band - Size 7 1/2
Antique Art Deco Platinum Carre Cut White Sapphire Eternity Band - Size 7 1/2

Antique Art Deco Platinum Carre Cut White Sapphire Eternity Band - Size 7 1/2

Located in Great Neck, NY

Beautiful Antique Art Deco Platinum Carre Cut White Sapphire Eternity Band - Size 7 1/2. This classic eternity band is crafted in platinum. The ring features carre cut white sapphire...

Category

Vintage 1920s Art Deco Wedding Rings

Materials

Sapphire, Platinum

Cartier Yellow Square Emerald Cut Diamond 3 Stone Ring in PLAT/18K Yellow Gold
Cartier Yellow Square Emerald Cut Diamond 3 Stone Ring in PLAT/18K Yellow Gold

Cartier Yellow Square Emerald Cut Diamond 3 Stone Ring in PLAT/18K Yellow Gold

By Cartier

Located in Philadelphia, PA

Made in platinum and 18k yellow gold, this ring has: 1 square emerald cut that weighs ~2.01 carat and is a Fancy Intense Yellow with VS1 clarity; accompanied with a GIA certificate. ...

Category

2010s Unknown Three-Stone Rings

Materials

Diamond, Platinum, 18k Gold, Yellow Gold

Carre Cut 1.50 Ct Channel Set Diamond Wedding Eternity Band Set in Platinum
Carre Cut 1.50 Ct Channel Set Diamond Wedding Eternity Band Set in Platinum

Carre Cut 1.50 Ct Channel Set Diamond Wedding Eternity Band Set in Platinum

By Simon Ardem

Located in New York, NY

Diamond Eternity Band set in Platinum, featuring 35 beautifully matched Carre cut diamonds in a channel setting. This classic piece has the following specifications; Color and Clarit...

Category

21st Century and Contemporary American Contemporary Band Rings

Materials

Diamond, Platinum, 14k Gold, 18k Gold

Gelin abaci Tension Set Princess Cut Diamond Ring
Gelin abaci Tension Set Princess Cut Diamond Ring

Gelin abaci Tension Set Princess Cut Diamond Ring

By Gelin Abaci

Located in New York, NY

Gelin Abaci Princess Cut Tension Set Diamond Ring. Diamond 0.90 carat Princess Cut, G color and VS clarity. Set in Platinum 17.1 grams. Size 6.75. Retail Price $6900.

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Vintage Aquamarine Ring. 18ct Aquamarine Diamond Accent Ring 18K Yellow Gold
Vintage Aquamarine Ring. 18ct Aquamarine Diamond Accent Ring 18K Yellow Gold

Vintage Aquamarine Ring. 18ct Aquamarine Diamond Accent Ring 18K Yellow Gold

Located in New York, NY

Primary Stone: Aquamarine Primary Stone Weight: Approx. 18.00 Carats Primary Stone Cut: Emerald Cut Secondary Stones: Diamond Secondary Stone Weight: Approx. 1.00 Carat Total Second...

Category

Vintage 1970s Art Deco Cocktail Rings

Materials

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

Art Deco 10.00 Carat Aquamarine and Diamond Ring
Art Deco 10.00 Carat Aquamarine and Diamond Ring

Art Deco 10.00 Carat Aquamarine and Diamond Ring

Located in London, GB

Here we have a striking cocktail ring crafted from platinum during the Art Deco movement.

Category

Vintage 1920s Art Deco Cocktail Rings

Materials

Aquamarine, Diamond, Platinum

2.80 Carat Carré Cut Diamond Three-Stone Ring
2.80 Carat Carré Cut Diamond Three-Stone Ring

2.80 Carat Carré Cut Diamond Three-Stone Ring

Located in London, GB

Here we have a gorgeous Art Deco three-stone ring. At the centre of the face, a bright white 2.80 carat carré-cut diamond takes prominence, exuding radiance and clarity. Flanking thi...

Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

Cartier 2.11 Carat GIA Diamond Cluster Ring, circa 1930
Cartier 2.11 Carat GIA Diamond Cluster Ring, circa 1930

Cartier 2.11 Carat GIA Diamond Cluster Ring, circa 1930

By Cartier

Located in London, GB

Cartier diamond cluster ring. Set with an impressive square step cut diamond, H colour, VVS2 clarity, with a weight of 2.11 carats in an open back claw setting, framed by four rectan...

Category

Vintage 1930s Engagement Rings

Materials

Diamond, Platinum

GIA Certified 4.11Ct Square Emerald Cut Diamond, I-IF
GIA Certified 4.11Ct Square Emerald Cut Diamond, I-IF

GIA Certified 4.11Ct Square Emerald Cut Diamond, I-IF

By The Diamond Source

Located in San Diego, CA

This is a very unique. one of a kind custom Platinum Ring with a large, rare Square Emerald Cut Diamond that is 4.11CT and is I in color and Internally Flawless.

Category

21st Century and Contemporary North American Contemporary Cocktail Rings

Materials

Diamond, Emerald, Platinum

Tiffany & Co. 1.3 ct Cut Cornered Square Cut Diamond Tiffany True Solitaire
Tiffany & Co. 1.3 ct Cut Cornered Square Cut Diamond Tiffany True Solitaire

Tiffany & Co. 1.3 ct Cut Cornered Square Cut Diamond Tiffany True Solitaire

By Tiffany & Co.

Located in New York, NY

Collection/Series: Tiffany True Solitaire Metal Type: Platinum Metal Purity: 950 Ring Size: 7 Pre-Owned Jewelry Condition: Excellent CENTER STONE INFORMATION Center Stone 1 Type: Di...

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Trabert & Hoeffer-Mauboussin Retro Colombian Emerald and Diamond Two-Row Ring
Trabert & Hoeffer-Mauboussin Retro Colombian Emerald and Diamond Two-Row Ring

Trabert & Hoeffer-Mauboussin Retro Colombian Emerald and Diamond Two-Row Ring

Located in London, GB

Colour: G-H, Clarity: VS Tested As: Platinum Maker's Mark: T&HM Box: The Vintage Jeweller Ring Box Comments: As this is a vintage ring we have left the natural wear untreated.

Category

Vintage 1950s Retro Fashion Rings

Materials

Diamond, Emerald, Platinum

Art Deco Ruby and Diamond Tablet Ring
Art Deco Ruby and Diamond Tablet Ring

Art Deco Ruby and Diamond Tablet Ring

Located in London, GB

Colour: G-H, Clarity: VS-SI Tested As: Platinum Period: Circa. 1930s Box: The Vintage Jeweller Ring Box

Category

20th Century Art Deco Cluster Rings

Materials

Diamond, Ruby, Platinum

Art Deco Colombian INSIGNIFICANT Emerald and Diamond Ring Circa 1920
Art Deco Colombian INSIGNIFICANT Emerald and Diamond Ring Circa 1920

Art Deco Colombian INSIGNIFICANT Emerald and Diamond Ring Circa 1920

Located in London, GB

A striking Art Deco emerald and diamond ring, centred on a certified 3.31 carat Colombian emerald of vivid green hue, framed by two concentric octagonal borders of sparkling old-cut ...

Category

Vintage 1920s Art Deco Cluster Rings

Materials

Diamond, Emerald, Platinum

Tiffany & Co. 0.41 ct Cut Cornered Square Mixed Cut Diamond Lucida Engagement Ri
Tiffany & Co. 0.41 ct Cut Cornered Square Mixed Cut Diamond Lucida Engagement Ri

Tiffany & Co. 0.41 ct Cut Cornered Square Mixed Cut Diamond Lucida Engagement Ri

By Tiffany & Co.

Located in New York, NY

Collection/Series: Lucida Metal Type: Platinum Metal Purity: 950 Ring Size: 5.75 Pre-Owned Jewelry Condition: Excellent CENTER STONE INFORMATION Center Stone 1 Type: Diamond Center ...

Category

21st Century and Contemporary American Engagement Rings

Materials

Platinum

Vintage 1940s Retro Tiffany & Co. Ruby, Sapphire and Diamond Ring
Vintage 1940s Retro Tiffany & Co. Ruby, Sapphire and Diamond Ring

Vintage 1940s Retro Tiffany & Co. Ruby, Sapphire and Diamond Ring

By Tiffany & Co.

Located in New York, NY

Finely crafted in platinum with four Square cut Rubies weighing approximately 0.80 carat and seven Square cut Sapphires weighing a total of approximately 0.70 carat.

Category

Vintage 1940s Retro Cocktail Rings

Materials

Diamond, Ruby, Sapphire, Platinum

Art Deco Carré Cut Diamond Full-Eternity Ring Size K (50)
Art Deco Carré Cut Diamond Full-Eternity Ring Size K (50)

Art Deco Carré Cut Diamond Full-Eternity Ring Size K (50)

Located in London, GB

Here we have a stylish eternity ring crafted during the Art Deco movement. This platinum piece features a continuous row of carré-cut diamonds, each meticulously channel set within a...

Category

Vintage 1930s Art Deco Band Rings

Materials

Diamond, Platinum

Tiffany & Co 1.69 Carat Lucida Diamond Engagement Ring
Tiffany & Co 1.69 Carat Lucida Diamond Engagement Ring

Tiffany & Co 1.69 Carat Lucida Diamond Engagement Ring

By Tiffany & Co.

Located in Bethesda, MD

From Tiffany & Co's Lucida collection; a 1.69 carat H VS1 diamond ring. Tiffany’s Lucida® diamond ring with its wide corners and dazzling brilliance makes a stunning presentation. •...

Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Platinum

Art Deco Ruby and Diamond Dress Ring
Art Deco Ruby and Diamond Dress Ring

Art Deco Ruby and Diamond Dress Ring

Located in London, GB

Here we have an Art Deco ring showcasing a striking geometric design. At the centre, a square-cut red ruby is prominently set, surrounded by a series of perfectly matched triangular ...

Category

Vintage 1920s Art Deco Engagement Rings

Materials

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

Art Deco Burmese sapphire five stone ring, circa 1925.
Art Deco Burmese sapphire five stone ring, circa 1925.

Art Deco Burmese sapphire five stone ring, circa 1925.

Located in London, GB

Art Deco Burmese sapphire five stone ring. Set with five rectangular step-cut natural unenhanced Burmese sapphires in open back rubover settings with a combined approximate weight of...

Category

Vintage 1930s Art Deco Cocktail Rings

Materials

Sapphire, Platinum

Art Deco 1.05ct Diamond Full Eternity Ring, c.1930s
Art Deco 1.05ct Diamond Full Eternity Ring, c.1930s

Art Deco 1.05ct Diamond Full Eternity Ring, c.1930s

Located in London, GB

This elegant Art Deco full eternity ring features 21 carre cut diamonds, each weighing 0.05 carats for a total of 1.05 carats. The glittering diamonds all match in quality at G in co...

Category

Vintage 1930s Unknown Art Deco Wedding Rings

Materials

Diamond, Platinum

Sapphire and Diamond Cluster Engagement Ring in 18 Karat Yellow Gold
Sapphire and Diamond Cluster Engagement Ring in 18 Karat Yellow Gold

Sapphire and Diamond Cluster Engagement Ring in 18 Karat Yellow Gold

Located in Jesmond, Newcastle Upon Tyne

This fine and impressive square cut sapphire ring with diamonds has been crafted in 18k yellow gold with a platinum setting.

Category

Vintage 1930s Engagement Rings

Materials

Diamond, Sapphire, Yellow Gold, Platinum

31.50 Carat Aquamarine and 1.02 Carat Diamond 18k White Gold Ring Circa 1950
31.50 Carat Aquamarine and 1.02 Carat Diamond 18k White Gold Ring Circa 1950

31.50 Carat Aquamarine and 1.02 Carat Diamond 18k White Gold Ring Circa 1950

Located in Jesmond, Newcastle Upon Tyne

The cluster ring features an impressive 31.50ct square faceted cut aquamarine, four-claw set in relief to the centre.

Category

Vintage 1950s Cocktail Rings

Materials

Aquamarine, Diamond, White Gold, Platinum

Antique Ruby and Diamond Eternity Ring Size N (54)
Antique Ruby and Diamond Eternity Ring Size N (54)

Antique Ruby and Diamond Eternity Ring Size N (54)

Located in London, GB

Here we have an elegant antique ruby and diamond full eternity ring. The band here has been crafted from platinum and plays host to alternating trios of square calibrated pink rubies...

Category

Early 20th Century Fashion Rings

Materials

Diamond, Ruby, Platinum

Tiffany & Co. Lucida Cut Diamond Engagement Ring 1.13 Carat/D Color GIA Cert
Tiffany & Co. Lucida Cut Diamond Engagement Ring 1.13 Carat/D Color GIA Cert

Tiffany & Co. Lucida Cut Diamond Engagement Ring 1.13 Carat/D Color GIA Cert

By Tiffany & Co.

Located in Mayfair, London, London

A stunning platinum Tiffany & Co. diamond ring from the Lucida collection. The ring comprises of a Lucida cut diamond in a 4 claw setting with a weight of 1.13ct, D colour and VVS2 c...

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Vintage 1.25ct Emerald and Diamond Cluster Ring, c.1970s
Vintage 1.25ct Emerald and Diamond Cluster Ring, c.1970s

Vintage 1.25ct Emerald and Diamond Cluster Ring, c.1970s

Located in London, GB

Gemstone: Emerald Stone Shape: Square Emerald Cut Carat Weight: 1.25 Metal: 18ct Yellow Gold, Platinum Age: 1970s Size: M

Category

Vintage 1970s Unknown Cluster Rings

Materials

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

Art Deco Synthetic Ruby and Diamond Cluster Ring
Art Deco Synthetic Ruby and Diamond Cluster Ring

Art Deco Synthetic Ruby and Diamond Cluster Ring

Located in London, GB

Here we have an synthetic ruby and diamond cluster ring crafted at a time when the Art Deco style was at the height of design.

Category

20th Century Art Deco Cluster Rings

Materials

Ruby, Diamond, Platinum, Yellow Gold, Gold

Tiffany & Co. .66 Carat Lucida Solitaire Engagement Ring and Diamond Band Set
Tiffany & Co. .66 Carat Lucida Solitaire Engagement Ring and Diamond Band Set

Tiffany & Co. .66 Carat Lucida Solitaire Engagement Ring and Diamond Band Set

By Tiffany & Co.

Located in Scottsdale, AZ

Ring size: 4.25 Introducing a timeless treasure from the iconic house of Tiffany & Co., this platinum vintage engagement ring set is sure to capture hearts.

Category

1990s Unknown Contemporary Engagement Rings

Materials

Diamond, Platinum

VAN CLEEF & ARPELS Mystery Set Sapphire and Diamond Ring
VAN CLEEF & ARPELS Mystery Set Sapphire and Diamond Ring

VAN CLEEF & ARPELS Mystery Set Sapphire and Diamond Ring

By Van Cleef & Arpels

Located in New York, NY

A striking vintage Van Cleef & Arpels ring from the 1970’s featuring the maison’s iconic mystery set technique. Deep blue calibré-cut sapphires are invisibly set in curved panels...

Category

Vintage 1970s Fashion Rings

Materials

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

Art Deco Sapphire Ruby and Diamond Day and Night Ring Size L (52)
Art Deco Sapphire Ruby and Diamond Day and Night Ring Size L (52)

Art Deco Sapphire Ruby and Diamond Day and Night Ring Size L (52)

Located in London, GB

Here we have a wonderful Art Deco sapphire, ruby and diamond day and night ring. This piece offers two rings in one allowing the wearer to flip the single cut set diamond sides aroun...

Category

Vintage 1920s Art Deco Band Rings

Materials

Ruby, Sapphire, Platinum

Art Deco 0.70ct Sapphire and Diamond Cluster Ring, c.1920s
Art Deco 0.70ct Sapphire and Diamond Cluster Ring, c.1920s

Art Deco 0.70ct Sapphire and Diamond Cluster Ring, c.1920s

Located in London, GB

A lovely Art Deco sapphire and diamond cluster ring which dates back to the 1920s. The central sapphire is a carre cut and weighs 0.70 carat. It has been rub over set and has a clust...

Category

Vintage 1920s Art Deco Cluster Rings

Materials

Diamond, Sapphire, Platinum

NALLY  GIA  Fancy Pink Color Diamond Ring
NALLY  GIA  Fancy Pink Color Diamond Ring

NALLY GIA Fancy Pink Color Diamond Ring

Located in New York, NY

Natural GIA Certified Fancy Light Purplish Pink Diamond Ring This rectangular mixed cut diamond weighs 4.03 carat (Color: Fancy Light Purplish Pink, Clarity: SI1, GIA# ) set in 18k...

Category

21st Century and Contemporary American Artist Solitaire Rings

Materials

Diamond, Pink Diamond, Platinum

Boucheron Ruby and Diamond Cocktail Ring, French, circa 1940
Boucheron Ruby and Diamond Cocktail Ring, French, circa 1940

Boucheron Ruby and Diamond Cocktail Ring, French, circa 1940

By Boucheron

Located in London, GB

Boucheron ruby and diamond cocktail ring. Centrally set with two rows of square step cut natural unenhanced rubies in open back rubover and channel settings, fourteen in total with a...

Category

Vintage 1940s French Cocktail Rings

Materials

Diamond, Ruby, Yellow Gold, Platinum

NALLY  Intense Fancy Yellow Color GIA Certified Diamond Ring
NALLY  Intense Fancy Yellow Color GIA Certified Diamond Ring

NALLY Intense Fancy Yellow Color GIA Certified Diamond Ring

Located in New York, NY

Nally Jewels Intense Fancy Yellow GIA certified Diamond Ring Diamond, Gold and Platinum Mounting. This ring has 18 step cut diamonds weighing a total of 1.87 tcw all bezel set in pl...

Category

21st Century and Contemporary American Artist Solitaire Rings

Materials

Diamond, Platinum

Art Deco Colombian Insignificant Emerald Diamond Engagement Ring
Art Deco Colombian Insignificant Emerald Diamond Engagement Ring

Art Deco Colombian Insignificant Emerald Diamond Engagement Ring

Located in Banbury, GB

Date Circa 1920 __________________________________ Metal Platinum Stone Diamond: approx o.6ct ...

Category

Vintage 1920s British Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

Antique 0.25ct Emerald and Diamond Cluster Ring, c.1930s
Antique 0.25ct Emerald and Diamond Cluster Ring, c.1930s

Antique 0.25ct Emerald and Diamond Cluster Ring, c.1930s

Located in London, GB

Gemstone: Emerald Stone Shape: Square Cut Carat Weight: 0.25 Metal: 18ct Yellow Gold, Platinum Age: 1930s Size: P

Category

Vintage 1930s British Art Deco Cluster Rings

Materials

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

  • 1
Get Updated with New Arrivals
Save "Square Platinum Ring", and we’ll notify you when there are new listings in this category.

Square Platinum Ring For Sale on 1stDibs

Surely you’ll find the exact square platinum 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 platinum, gold and 18k 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 square platinum 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. 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 square platinum ring has been a part of the legacy of many jewelers, but those produced by Tiffany & Co., EMD Diamonds and Antinori Fine Jewels are consistently popular. While most can agree that any square platinum ring from our collection can easily elevate most outfits, but the choice of a diamond version from the 954 available is guaranteed to add a special touch to your ensemble. Today, if you’re looking for a square cut version of this piece and are unable to find the perfect match, our selection also includes emerald cut and old european cut alternatives. Finding a square platinum ring for sale for women should be easy, but there are 411 pieces available to browse for unisex as well as men, too.

How Much is a Square Platinum Ring?

The price for a square platinum ring starts at $151 and tops out at $2,200,000 with these rings, on average, selling for $6,696.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And 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

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.  

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.