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12 Carat Solitaire Diamond Ring

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TYPE IIA Golconda GIA Certified 12 Carat Oval Diamond Platinum Solitaire Ring
By Antinori Fine Jewels
Located in Rome, IT
carat oval diamond platinum solitaire ring. Experience the epitome of luxury and rarity that transcends
Category

2010s Contemporary Solitaire Rings

Materials

Diamond, Platinum

Diamond Solitaire Ring
By Vitale 1913
Located in Monte-Carlo, MC
beautiful ring is created from natural white diamonds in total of 0.17 Carat and 12 diamonds on the shank
Category

2010s Italian Contemporary Solitaire Rings

Materials

Diamond, White Diamond, 18k Gold, White Gold

Antique 1.18 Carat Diamond and Yellow Gold Solitaire Ring
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive 1.18 carat diamond, 12 karat yellow gold and platinum set
Category

Vintage 1920s Unknown Solitaire Rings

Materials

Diamond, Yellow Gold

IGI Certified 1.01 Carat Solitaire Diamond Ring
Located in Palermo, IT
Certified 1,01 ct Solitaire Diamond Ring colour E ,Si2 round cut.Italian manifacture 1960 ca. 18kt
Category

Vintage 1950s Italian Modern Solitaire Rings

18 carat yellow gold solitaire round brillant cut diamond ring
Located in Monte-Carlo, MC
18 carat yellow gold solitaire ring designed with 1 round brillant cut diamond weighing 0.34 carat
Category

2010s Solitaire Rings

Materials

Diamond, Yellow Gold

IGI Certified 3.00 Carat Natural Diamond 18k Gold Solitaire Ring
Located in Massafra, IT
[Custom Size Available] Diamond Weight : 4.20 Carats [3 Carats Center + 12 pcs x 0.10 Cts Side] Diamond
Category

21st Century and Contemporary Italian Contemporary Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Oval 12 Carat Treated Ruby and 1 Carat Diamond 14 Karat Yellow Gold Ring
Located in New York, NY
16 X11 Oval Cut Approximately 12.28 Carat Treated Ruby 14 Karat Yellow Gold Ring Size 6
Category

2010s Solitaire Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

1.65 Carat Padparadscha Sapphire Solitaire & Baguette Diamond 18 Karat Gold Ring
Located in METAIRIE, LA
Containing 1 Central Bezel set 1.65 carat Oval cut Natural Padparadscha Sapphire solitaire at 7.7mm
Category

Vintage 1970s Solitaire Rings

Materials

Diamond, Sapphire, Yellow Gold, 18k Gold

Alex Jona 9.9 Carat Tanzanite White Diamond Gold Solitaire Cocktail Ring
By Alex Jona
Located in Torino, IT
Alex Jona one-of-a-kind collection, hand crafted in Italy, 18 karat white gold solitaire ring
Category

21st Century and Contemporary Italian Solitaire Rings

Materials

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

18ct Gold Diamond Solitaire Ring circa 1920s
Located in London, GB
18ct gold ring featuring a lovely diamond solitaire. Ring size UK Q 1/2 / US 8 1/4, and inside
Category

Early 20th Century Solitaire Rings

Materials

Diamond, 18k Gold

3 Carat Round Cut Natural Diamond Solitaire Mens Ring in 14K Gold Two Tone
By Gad & Co.
Located in Miami, FL
Solitaire men's ring, crafted in 14k gold. Weighing 9.4 grams, and ring size 7 1/4, ideal as a
Category

2010s North American Modern Solitaire Rings

Materials

Diamond, Yellow Gold, 14k Gold

1 Carat Ruby and Black Diamond Solitaire Ring Set in 18 Karat Yellow Gold
Located in London, GB
other rings from our collection. Ring Size: UK - O, US - 7 1 Carat Ruby (Centre) 12/0.49 Carat Black
Category

2010s British Contemporary Solitaire Rings

Materials

Black Diamond, Ruby, 18k Gold, Yellow Gold

Alex Jona Emerald White Diamond Platinum Solitaire Ring
By Alex Jona
Located in Torino, IT
Alex Jona design collection, hand crafted in Italy, platinum solitaire ring centering a certified
Category

21st Century and Contemporary Italian Contemporary Solitaire Rings

Materials

White Diamond, Emerald, Platinum

Alex Jona White Diamond Yellow Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
Alex Jona design collection, hand crafted in Italy, 18k yellow gold solitaire ring centering a
Category

2010s Italian Contemporary Solitaire Rings

Materials

White Diamond, 18k Gold, Yellow Gold

Art Deco Mine Diamond White Gold Ring Solitaire
Located in Firenze, FI
gorgeous central 0.90 Carat Old Mine Diamond . The central Diamond surrounded by 12 smaller Old Mine Cut
Category

Early 20th Century French Art Deco Solitaire Rings

Materials

Diamond, White Gold

Alex Jona Aquamarine White Diamond White Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
Alex Jona design collection, hand crafted in Italy, 18k white gold solitaire ring, centering a 1.72
Category

2010s Italian Contemporary Solitaire Rings

Materials

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

Alex Jona Emerald White Diamond White Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
Alex Jona design collection, hand crafted in Italy, 18k white gold solitaire ring, centering a 0.55
Category

2010s Italian Contemporary Solitaire Rings

Materials

Emerald, White Diamond, White Gold, 18k Gold

Natural Diamond 0.06CT 18Karat Rose Gold Baguette Cut Solitaire Ring
Located in Antwerpen, BE
Behold the 18kt Rose Gold Natural Diamond Solitaire Baguette Ring, a masterpiece of grace and
Category

2010s Belgian Modern Solitaire Rings

Materials

Diamond, Rose Gold

Natural Diamond 0.06CT 18Karat White Gold Baguette Cut Solitaire Ring
Located in Antwerpen, BE
Behold the 18kt White Gold Natural Diamond Solitaire Baguette Ring, a masterpiece of grace and
Category

2010s Belgian Modern Solitaire Rings

Materials

Diamond, White Gold

Natural Diamond 0.06CT 18Karat Yellow Gold Baguette Cut Solitaire Ring
Located in Antwerpen, BE
Behold the 18kt Yellow Gold Natural Diamond Solitaire Baguette Ring, a masterpiece of grace and
Category

2010s Belgian Modern Solitaire Rings

Materials

Diamond, Yellow Gold

Delightful Cabochon Ruby and Diamond Solitaire Ring in 18 Karat
Located in Wailea, HI
Delightful Cabochon Ruby and Diamond Solitaire Ring in 18k One Cabochon Ruby weighing 1.12 carats
Category

Late 20th Century American Modern Solitaire Rings

Materials

White Diamond, Ruby

Alex Jona White White Diamond Yellow Gold Solitaire Band Ring
By Alex Jona
Located in Torino, IT
centering a 0.38 carats, F Color, VVS2 Clarity brilliant round cut white diamond. Ring Size: 12 EU/6 US
Category

2010s Italian Contemporary Solitaire Rings

Materials

White Diamond, 18k Gold, Yellow Gold

Antique Platinum 1.08ctw GIA European Diamond Solitaire Sapphire Engagement Ring
Located in Montclair, NJ
art deco period. This ring features a, GIA certified, old European cut diamond neatly set at the
Category

Early 20th Century Unknown Art Deco Solitaire Rings

Materials

Diamond, Sapphire, Platinum

2.01 ct HRD Classic Solitaire Diamond Ring in 18k White Gold
Located in KAATSHEUVEL, NL
HRD (Antwerp diamond high council) certified 2.01 carat H-VS2 round diamond engagement ring. Round
Category

21st Century and Contemporary Italian Contemporary Solitaire Rings

Materials

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

Elegant 0.72 Carat Round Diamond Ring
Located in רמת גן, IL
carat cut: Round Brilliant color: D clarity: VVS2 cut grade: EX 12 diamond side stones of total: 0.1
Category

2010s Israeli Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Amethyst and Diamond 10 Karat Yellow Gold Ring, Solitaire Prong Setting
Located in Milford, DE
/4 Hallmarks: 10K Amethyst size: 8 x 6 mm Diamond (12) total carat weight approx .23 ct
Category

Late 20th Century Solitaire Rings

Materials

Amethyst, Diamond, 10k Gold

18KT White Gold Natural Diamonds The Radiant Emerald Cut Solitaire Ring
Located in Antwerpen, BE
Embodying celestial elegance, this exquisite Emerald Cut Solitaire Ring in 18K White Gold boasts a
Category

2010s European Modern Solitaire Rings

Materials

Diamond, Emerald, White Gold

Natural Diamond Ring 0.11 Carats 18 Karat Rose Gold Engagement Ring
Located in Antwerpen, BE
At the heart of the ring lies a stunning baguette diamond, radiating a sleek and modern allure. The
Category

2010s Belgian Modern Solitaire Rings

Materials

Diamond, 18k Gold, Rose Gold

Natural Diamond Ring 0.11 Carats 18 Karat Yellow Gold Engagement Ring
Located in Antwerpen, BE
At the heart of the ring lies a stunning baguette diamond, radiating a sleek and modern allure. The
Category

2010s Belgian Modern Solitaire Rings

Materials

Diamond, 18k Gold, Yellow Gold

Natural Diamond Ring 0.11 Carats 18 Karat White Gold Engagement Ring
Located in Antwerpen, BE
At the heart of the ring lies a stunning baguette diamond, radiating a sleek and modern allure. The
Category

2010s Belgian Modern Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Georgios Collections 18 Karat Yellow Gold Solitaire Blue and White Diamond Ring
By Georgios Collections Inc
Located in Astoria, NY
This is a stunning S.Georgios designer Solitaire Ring in Yellow Gold 18 Karat all decorated with a
Category

21st Century and Contemporary Greek Byzantine Solitaire Rings

Materials

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

Alex Jona Blue Sapphire White Diamond 18 Karat Yellow Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
0.16 carats in total. Ring size US. 6/EU size 12, can be sized to any specification. Dimensions: 0.82
Category

2010s Italian Solitaire Rings

Materials

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

18 Carat Gold Hoop Ring with Diamonds
Located in Amsterdam, NL
An 18 carat yellow gold ring with a white gold loop set with 19 diamonds (app. 0.76 carat) set in
Category

Early 2000s European Solitaire Rings

Materials

Diamond, Gold, 18k Gold

Diamond and Ruby Art Deco Style Solitaire Ring in 18K White Gold
Located in Bangkok, TH
Diamond and ruby ring showcases one round cut diamond weighing approximately 0.4 carat, having H
Category

21st Century and Contemporary Thai Art Deco Solitaire Rings

Materials

Ruby, Diamond, White Gold, 18k Gold

London Blue Topaz Ring Diamond Halo 3.89 Carats
Located in Laguna Niguel, CA
= 3.80 Carat 12 Diamonds = 0.09 Carats Metal: Rhodium Plated Sterling Silver Ring Size: 7* US *It can be
Category

21st Century and Contemporary Contemporary Solitaire Rings

Materials

Diamond, White Diamond, Topaz, Blue Topaz, Silver, Sterling Silver

Alex Jona Pink Sapphire White Diamond 18 Karat Rose Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
sapphire weighing 0.69 carats. The shoulders are set with 18 white diamonds, F color, VVS1 clarity
Category

2010s Italian Solitaire Rings

Materials

White Diamond, Pink Sapphire, 18k Gold, Rose Gold

Vintage 12 Ct Natural Carved Emerald & 1.5 Ct Diamond Ring 18 Kt Yellow Gold
Located in New York, NY
Vintage 18 Karat Yellow Gold Ring Size 6.5 featuring a single solitaire natural carved emerald
Category

Early 2000s Solitaire Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

1.7 carat oval ring
Located in Dublin, IE
Specifications ( RING ) Weight: 2.0493 DWT (3.19 grams) Primary Stone Count: 1-stone Diamond
Category

2010s Irish Modern Solitaire Rings

Materials

Diamond, 14k Gold, White Gold

1.7 carat oval ring
1.7 carat oval ring
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Luxurious 18 Karat White Gold Ring with Large Emerald and 12 Diamonds
Located in Berlin, DE
Luxurious 18 Karat white gold ring with large emerald and 12 diamonds The diamonds are of very
Category

20th Century Solitaire Rings

Materials

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

Antique Victorian 9K Gold Round Opal Solitaire w/ Old Cut Diamond Halo Ring
Located in Montclair, NJ
Nice Green, Violet and Orange Play of Colors- 5.8mm (approx.) (12) Natural Genuine Diamonds - Old Mine
Category

Antique 1890s Victorian Solitaire Rings

Materials

Diamond, Opal, 9k Gold, Yellow Gold

Exquisite 2.53-carat Heart Brilliant Natural Diamond Ring
Located in רמת גן, IL
This exquisite ring features a dazzling 2.53-carat heart brilliant natural diamond as its
Category

2010s Israeli Solitaire Rings

Materials

Diamond, White Gold

GIA Certified 3.50 Carat Royal Blue Sapphire Round Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
An Iconic Style and VERY ELEGANT Ceylon Natural Gorgeous Deep Blue Sapphire & Diamond Cluster Ring
Category

2010s Italian Modern Solitaire Rings

Materials

Diamond, Blue Sapphire

Emerald Cut London Blue Topaz and Diamond Solitaire Ring in 14K Yellow Gold
Located in Bangkok, TH
. This ring features a beautiful emerald cut London blue topaz with a glittering white diamonds on its
Category

21st Century and Contemporary Thai Art Deco Solitaire Rings

Materials

Blue Topaz, Topaz, Diamond, Yellow Gold, 14k Gold

12 Ct Natural Marquis Ruby & 0.75 Ct Diamond 18 Kt White Gold Ball Ring Size 6
Located in New York, NY
12 Ct Natural Marquis Ruby & 0.75 Ct Diamond 18 Kt White Gold Ball Ring Size 6 Introducing our
Category

2010s Solitaire Rings

Materials

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

Natural 8 Carat Emerald Cut Zambian Emerald & Diamond Ring in Platinum, Estate
Located in New York, NY
Natural 8 Carat Emerald Cut Zambian Emerald & Diamond Ring in Platinum, Estate A classic design
Category

2010s Solitaire Rings

Materials

Diamond, Emerald, Platinum

Alex Jona Aquamarine Rose & Yellow Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
centering 1.05 carats of aquamarine. Ring shoulders are in rose & yellow gold. Ring Size: 12 EU/6.5 US
Category

2010s Italian Contemporary Solitaire Rings

Materials

Aquamarine, 18k Gold, Rose Gold, Yellow Gold

14K Yellow Gold Organic Round Salt and Pepper Diamond Ring 'Center: 1.28 Carat'
Located in San Francisco, CA
on its crown gallery. In the center of the ring is set 1.28 Carat Salt and Pepper round diamond. If
Category

21st Century and Contemporary American Solitaire Rings

Materials

Diamond, 14k Gold, Yellow Gold

3 carat pear shaped engagement ring.
Located in Dublin, IE
A beautiful custom made to order 3 carat diamond engagement ring. Two tone in colour white gold and
Category

2010s Irish Modern Solitaire Rings

Materials

White Diamond, White Gold, Yellow Gold

Alex Jona Aquamarine Blue Sapphire White Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
Alex Jona design collection, hand crafted in Italy, 18k white gold solitaire ring, centering a 1.03
Category

2010s Italian Contemporary Solitaire Rings

Materials

Blue Sapphire, Aquamarine, Gold, White Gold, 18k Gold

Alex Jona Aquamarine Blue Sapphire White Gold Solitaire Ring
By Alex Jona
Located in Torino, IT
Alex Jona design collection, hand crafted in Italy, 18k white gold solitaire ring, centering a 1.61
Category

2010s Italian Contemporary Solitaire Rings

Materials

Blue Sapphire, Aquamarine, White Gold, 18k Gold, Gold

GIA Certified 3.48 Carat Natural Color Change Alexandrite Ruby Diamond Ring
Located in New York, NY
natural diamonds. G color vs2 clarity. 14 karat white gold 12 grams Deck of ring measures 15 x 13 mm
Category

2010s American Solitaire Rings

Materials

Diamond, Ruby, Alexandrite, 14k Gold, White Gold

GIA Certified Blue 7.2 Carat Aquamarine Diamond 18 Karat Gold Ring
Located in Wallkill, NY
cut, Surrounded by 12 Diamonds Approximately 1/2 Carat, 3 on each angle. Ring is a size 8-3/4 and can
Category

Vintage 1950s Unknown Solitaire Rings

Materials

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

GIA Platinum Diamonds and Sapphire Ring
Located in New York, NY
Platinum diamonds and sapphire ring , set with 18 round brilliant cut diamonds. Total weight
Category

21st Century and Contemporary American Artist Solitaire Rings

Materials

Diamond, Sapphire, Platinum

Large 43 Carat Yellow Topaz Emerald Step Cut and Diamond Ring in 14k Yellow Gold
Located in Honolulu, HI
Diamond Count: 12 single cut diamonds Diamond Weight: 0.35 carats Diamond Color: I-J Diamond Clarity
Category

21st Century and Contemporary Unknown Modern Solitaire Rings

Materials

Diamond, Topaz, 14k Gold, Yellow Gold

7.20 Ct. Natural Aquamarine Vintage Style Filigree Solitaire Ring in 14K Gold
Located in Bangkok, TH
and diamonds. GEMMA FILIGREE custom ring box and certificate of authenticity are included with every
Category

21st Century and Contemporary Thai Edwardian Solitaire Rings

Materials

Aquamarine, 14k Gold, White Gold

2.26ct GIA Certified Natural Purple Pink Sapphire Diamonds Ring 14kt
Located in New York, NY
& Transparent 1.20ct. natural Diamonds. Rounds Full cuts G-color Vs-2 clarity. 14kt. white gold Ring
Category

2010s American Solitaire Rings

Materials

Diamond, Sapphire, 14k Gold, White Gold

Diamond Ring 18K White Gold Engagement Old European Cut 2.05 TDW
By Estate Jewelry
Located in East Brunswick, NJ
cut diamond is .75 carat by calculation of VS1 clarity and K color. 12 princess cut diamonds total
Category

20th Century Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Stunning 0.60ct Moonstone with Side Diamonds Ring
Located in רמת גן, IL
brilliant natural diamonds, collectively weighing 0.10 carats, and 12 taper-shaped diamonds totaling 0.12
Category

2010s Singaporean Solitaire Rings

Materials

Diamond, Moonstone, White Gold

14K Yellow Gold Men's Diamond Ring 0.35ct
Located in Laguna Beach, CA
Men's 14k yellow ring with diamond. Stamped 14k and weighs 12.8 grams. The diamond is a round
Category

Mid-20th Century Solitaire Rings

Materials

Diamond, 14k Gold, Yellow Gold

12.49 Carat Australian Black Opal Certified "Lightening Ridge" Mine 18K Ring
By Malpani Jewels
Located in Hung Hom, HK
jewellery. A wonderful cocktail of colors form on the body of this certified 12 carat black opal from
Category

2010s Hong Kong Art Nouveau Solitaire Rings

Materials

White Diamond, Opal, Black Opal, 18k Gold

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12 Carat Solitaire Diamond Ring For Sale on 1stDibs

You are likely to find exactly the 12 carat solitaire diamond ring you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from Gold, Platinum and 14k Gold — can elevate any look. Our collection of these items for sale includes 15 vintage editions and 32 modern creations to choose from as well. You’re likely to find the perfect 12 carat solitaire 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. For this particular piece, .5 Carat and 1 Carat are consistently popular carat weights. There have been many well-made iterations of the classic 12 carat solitaire diamond ring over the years, but those made by Tiffany & Co., Antinori Fine Jewels and Boucheron are often thought to be among the most beautiful. A round cut version of this piece has appeal, but there are also oval cut and cushion cut versions for sale. Most of our 12 carat solitaire diamond ring for sale are for women, but there are 23 pieces available to browse for men.

How Much is a 12 Carat Solitaire Diamond Ring?

Prices for a 12 carat solitaire diamond ring can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $350 and can go as high as $1,275,000, while this accessory, on average, fetches $9,519.

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.