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12 Carat Platinum Engagement Ring

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.45 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 8.95 Metal Type: Platinum Weight: 4.9 grams Center Diamond Details Shape: Old European
Category

Vintage 1930s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

.70 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 8 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3 grams Center Diamond
Category

Vintage 1940s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

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

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

.90 Carat Diamond Old European Cut Platinum Engagement Ring
Located in Stamford, CT
.90ct diamond Platinum antique style engagement ring. Old European cut diamond set in a triple
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

5.89 Carat Natural Oval Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
5.89ct Oval brilliant cut white sapphire and diamond engagement ring. In a handmade platinum
Category

Late 20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

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

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

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

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

2.78 Carat Purple Octagon Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
platinum setting. GIA Certified# 2135241870 1 octagonal Emerald cut purple Sapphire, approx. total weight
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

Antique 1920s Platinum Diamond Engagement Ring .74 Carat
Located in Boston, MA
Antique 1920s Platinum Diamond Engagement Ring - The center old European Cut diamond weighs .74ct
Category

Vintage 1920s American Art Deco Engagement Rings

Materials

Diamond, Platinum

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

Mid-20th Century Engagement Rings

Materials

Blue Sapphire, Sapphire, Diamond, Platinum, Enamel

.40 Carat Art Deco Diamond Platinum Engagement Ring
Located in Atlanta, GA
Item Details: Ring Size: 7 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.1 grams Center
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

1.17 Carat Old European Cut Diamond Edwardian Platinum Engagement Ring
Located in Stamford, CT
1900-1910 Edwardian Diamond Platinum engagement ring. 1 original old European cut, approx. total
Category

Vintage 1910s Engagement Rings

Materials

Diamond, Platinum

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

21st Century and Contemporary Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

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

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

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

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

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

1990s Engagement Rings

Materials

Diamond, Sapphire, Yellow Sapphire, Platinum

GIA Certified 1.82 Carat Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Art Deco cornflower blue sapphire and diamond engagement ring. GIA certified oval sapphire in a
Category

Early 20th Century Engagement Rings

Materials

Sapphire, Blue Sapphire, Diamond, Platinum

9.60 Carat Oval Light Yellow Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
1950’s oval faint yellow sapphire an diamond engagement ring. Very light yellow oval Sapphire
Category

Mid-20th Century Engagement Rings

Materials

Diamond, Yellow Sapphire, Sapphire, Platinum

Peter Suchy GIA 1.00 Carat Princess Cut Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Diamond engagement ring. GIA certified princess cut diamond center stone set in platinum with 12
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

1.20 Carat Cabochon Chrysoberyl Cat's Eye Diamond Platinum Engagement Ring
Located in Stamford, CT
Chrysoberyl cat’s eye and diamond Art Deco engagement ring. Chrysoberyl cabochon oval center stone
Category

Early 20th Century Engagement Rings

Materials

Chrysoberyl, Diamond, 18k Gold, White Gold, Platinum

1.21 Carat Natural Yellow Orange Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
diamond engagement ring. Original old European cut sapphire with raised crown and small table accented
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Yellow Sapphire, Platinum

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

21st Century and Contemporary Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

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

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

12 Carats Round Brilliant Diamond Engagement Ring Certified I VVS1 IGI Report
Located in New York, NY
Clarity: SI1 Style: Round Brilliant Cut Setting: Three Stone & 4 claw prong Metal: Platinum Total Carat
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.25 Carat Yellow Diamond Platinum Engagement Ring
Located in Atlanta, GA
Ring Size: 8 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.5 grams Center Diamond
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Yellow Diamond, Platinum

Platinum Art Deco Baguette Diamond 2.58 Carat Colombian Emerald Engagement Ring
Located in Los Angeles, CA
- Emerald Cut Colombian Emerald 2.58 Carats, 24 Round Diamonds F-G Color VS2 Clarity, 12 Tapered Baguette
Category

21st Century and Contemporary American Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

2.68 Carat GIA Old European Cut Diamond Platinum Deco Engagement Ring
Located in Tampa, FL
2.68 Carat GIA Old European Cut Diamond Platinum Deco Engagement Ring This immaculate example of a
Category

Vintage 1920s American Art Deco Engagement Rings

Materials

Diamond, Platinum

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

21st Century and Contemporary Contemporary Engagement Rings

Materials

Diamond, Platinum

12 Carat Oval Cut Diamond Engagement Ring GIA Certified F IF
Located in New York, NY
MACY OVAL HALO DIAMOND ENGAGEMENT RING PLATINUM BY MIKE NEKTA GIA CERTIFIED Center Diamond Carat
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

GIA Certified Art Deco 4.51 Carat Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
Periwinkle blue sapphire and diamond engagement ring. GIA certified oval natural no heat untreated
Category

Early 20th Century Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 2.71 Carat Chrysoberyl Cat’s Eye Diamond Platinum Engagement Ring
Located in Stamford, CT
Art Deco 2.71ct Chrysoberyl Cat’s Eye and diamond Platinum engagement ring. 1920-1930 ring. GIA
Category

Early 20th Century Engagement Rings

Materials

Chrysoberyl, Diamond, Cat’s Eye, Platinum

12 Carat Radiant Cut Diamond Engagement Ring GIA Certified J SI1
Located in New York, NY
ISLA DIAMOND ENGAGEMENT PLATINUM RING BY MIKE NEKTA GIA CERTIFIED Center Diamond: Carat Weight
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

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

Early 20th Century Engagement Rings

Materials

Diamond, White Diamond, Yellow Diamond, Platinum

GIA Certified 2.40 Carat Diamond Platinum Art Deco Engagement Ring
Located in Beverly Hills, CA
One GIA certified 2.40 ct. diamond platinum Art Deco engagement ring centering one prong set, old
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

GIA Certified 2.69 Carat Art Deco Diamond Platinum Engagement Ring
Located in Atlanta, GA
Item Details: Ring Size: 7.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.5 grams
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

Vintage 1.61 Carats European Cut Diamond Sapphire Platinum Engagement Ring
Located in Miami, FL
This Vintage art Deco Ring ring is crafted in solid Platinum With a geometric, mill-grain deco
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

12 Carats Cushion Cut Diamond Engagement Ring GIA Certified D VS1
Located in New York, NY
color Ring: Metal: Platinum & 18 Metal Weight: 10.40 Grams Diamonds: 2.17 Carats Color: Yellow Setting
Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, Platinum

Art Deco Platinum Halo Diamond Oval 3.75 Carat Blue Sapphire Engagement Ring
Located in Los Angeles, CA
!!!! Handmade Platinum Sapphire and Diamond Engagement Ring Featuring a Halo Sri Lankan Oval Shaped 3.75 Carat
Category

21st Century and Contemporary American Art Deco Engagement Rings

Materials

Sapphire, Blue Sapphire, Platinum

Modern Platinum 3.46 Carat Natural Royal Blue Sapphire & Diamond Engagement Ring
Located in Los Angeles, CA
Modern Platinum 3.46 Carat Natural Royal Blue Sapphire & Diamond Engagement Ring Stunning Ring set
Category

2010s North American Modern Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

Natural Diamond Ring Platinum Engagement Band 1.10 TDW
By Estate Jewelry
Located in East Brunswick, NJ
Natural Diamond Ring Platinum Engagement Band 1.10 TDW This stunning estate engagement ring is
Category

Late 20th Century Engagement Rings

Materials

Diamond, Platinum

Emerald Cut 1.20 carat D VVS2 GIA Platinum Ring with 12 Diamonds 0.42 carat
Located in Miami, FL
Crafted from Platinum, the magnificent engagement ring comes enriched with 1.20 carats Color D
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Emerald, Platinum

6 carat engagement ring
Located in Dublin, IE
colour of the ring. Yellow gold - Platinum -white gold everything is possible. And like all custom
Category

2010s Irish Modern Engagement Rings

Materials

White Diamond, 18k Gold, Yellow Gold

Platinum Diamond GRS 1.76 Carat Emerald Cut Blue Sapphire Engagement Ring
Located in Los Angeles, CA
Emerald Cut Blue Sapphire, 12 Round Diamonds, 6 Marquise Diamonds F-G Color VS2 Clarity 0.46 Carats. GRS
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

11.89 Carat Emerald Cut Diamond I/VS1 GIA Platinum Engagement Ring
Located in New York, NY
Absolutely stunning and certainly impressive 11 carat diamond engagement ring! This baby is made to
Category

20th Century American Modern Engagement Rings

Materials

Diamond, Platinum

Tacori 1.13 Carat GIA Cushion Diamond Platinum Three-Stone Engagement Ring
By Tacori
Located in Miami, FL
This minimal yet glam engagement ring is crafted in solid platinum, weighing 6.5 grams and
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

Antique 2.05 Carat F Si1 Old Cut Diamond Platinum Engagement Ring, circa 1920s
Located in London, GB
This absolutely stunning 1920's engagement ring is set with a GIA certified old cut diamond graded
Category

Vintage 1920s English Art Deco Engagement Rings

Materials

Diamond, Platinum

1.02 Carat Natural Ruby and Diamond Engagement Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring set in Platinum featuring a 1.02 Carat Natural Ruby and 0.94 Carat Diamonds
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Ruby, Platinum

1940s Art Deco Platinum 1+ Carat Euro Cut Diamond Engagement Ring
Located in Lexington, KY
This is an absolutely gorgeous Art Deco ring in platinum with a stunning 1+ carat old Euro cut
Category

Vintage 1940s Art Deco Engagement Rings

Materials

Diamond, Platinum

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

2010s Irish Modern Engagement Rings

Materials

White Diamond, Platinum

Ladies Platinum Double Halo Diamond Engagement Ring
Located in Houston, TX
Weight: 5.30 grams Ladies 950 platinum diamond double-halo engagement ring with a half round shank
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Platinum Art Deco Pear Shape Diamond 8.59 Carat Blue Sapphire Engagement Ring
Located in Los Angeles, CA
Ring Metal- 90% Platinum, 10% Iridium. Stones- GIA Certified Ceylon/Sri Lanka Oval Blue Sapphire 8.59
Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

1.50 Carat Sapphire Diamond Platinum Ring
Located in Beverly Hills, CA
One 1.50 Carat Sapphire Diamond Platinum Ring. Featuring one oval mixed cut sapphire of 1.50 carats
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

1930s Art Deco .60 Carat Old European Cut Diamond Platinum Engagement Ring
Located in Atlanta, GA
Item Details: Ring Size: 7 Metal Type: Platinum Weight: 3.1 grams Center Diamond Details Shape
Category

Vintage 1930s Unknown Art Deco Engagement Rings

Materials

White Diamond, Platinum

GIA Certified Marquise Brilliant Cut Diamond Platinum Engagement Ring
By Antinori Fine Jewels
Located in Rome, IT
Exquisite 2.02 ct Total Weight Marquise Brilliant Cut Diamond Platinum Engagement Ring! Crafted
Category

2010s American Engagement Rings

Materials

Diamond, White Diamond, Platinum

Tiffany & Co. Round Circlet 0.64 Carat G VS Diamond Engagement Ring in Platinum
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. Style: Circlet Ring Style Number: 165-12-22413201 Metal: Platinum PT950 Ring Size
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

1925, Art Deco Diamond Platinum Engagement Ring
Located in Lexington, KY
This is a breathtaking Art Deco platinum diamond engagement ring. Featuring a stunning 1.25-carat
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

6.43 Carat Emerald Cut Diamond Engagement Ring VS1 J/K Color, Platinum Setting
Located in Stamford, CT
5.68 Ct Emerald Cut Diamond Engagement Ring VS1 J/K Color with Two .75 TDW Stones on Side. This
Category

Late 20th Century Engagement Rings

Materials

Diamond, Platinum

10.00 Carat Amethyst Platinum Ring
Located in Atlanta, GA
Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 8.8 grams Center Stone
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Amethyst, White Diamond, Platinum

Hand Engraved Platinum GIA E Color 2 Carat Princess Cut Diamond Engagement Ring
Located in Los Angeles, CA
4.96 A Breathtaking Art Deco Inspired Platinum Diamond Engagement Ring Made For Princess Cut Diamond
Category

2010s North American Art Deco Engagement Rings

Materials

Diamond, Platinum

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

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

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12 Carat Platinum Engagement Ring For Sale on 1stDibs

Surely you’ll find the exact 12 carat platinum engagement ring you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Platinum, Gold and 18k Gold. Our collection of these items for sale includes 86 vintage editions and 83 modern creations to choose from as well. If you’re looking for a 12 carat platinum engagement ring from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 20th Century while another version may have been produced as recently as the 21st Century. There have been many well-made iterations of the classic 12 carat platinum engagement ring over the years, but those made by Tiffany & Co., J. Birnbach and Antinori Fine Jewels are often thought to be among the most beautiful. Today, if you’re looking for a round cut version of this piece and are unable to find the perfect match, our selection also includes emerald cut and old european cut alternatives. Finding a 12 carat platinum engagement ring for sale for women should be easy, but there are 41 pieces available to browse for unisex as well as men, too.

How Much is a 12 Carat Platinum Engagement Ring?

Prices for a 12 carat platinum engagement ring can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $1,495 and can go as high as $1,350,000, while this accessory, on average, fetches $28,475.

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.