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12 Carat Necklaces

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12 Carat Riviera Diamond Necklace
By Belfiore Jewelry
Located in Great Neck, NY
Graduated 3 prong diamond necklace set in 14K white gold. The center stone weighs 0.75 carats. The
Category

21st Century and Contemporary American Modern More Necklaces

Materials

Diamond, 14k Gold

12 Carat Riviera Diamond Tennis Necklace
By Antinori Fine Jewels
Located in Rome, IT
White Gold Karat 14K Four-prong setting riviera tennis necklace Graduated tennis necklace with
Category

2010s Italian Modern Chain Necklaces

Materials

Diamond, White Diamond, 18k Gold, White Gold

12 Carat Diamond Platinum Necklace
Located in Bay Harbor Islands, FL
12 carats. It is further set with a natural color yellow diamond weighing approximately 0.50 carats
Category

Vintage 1940s Unknown More Necklaces

Materials

Diamond, Yellow Diamond, Platinum

12 Carat Diamond Platinum Necklace
12 Carat Diamond Platinum Necklace
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L 15.63 in
Opera Tennis Necklace 12 Carats 36 Inch
By Belfiore Jewelry
Located in Great Neck, NY
Opera necklace 36 inch set in 14K white gold. Each stone weighs 0.06 carats. The total weight is
Category

2010s Italian Modern More Necklaces

Materials

Diamond, 14k Gold

.12 Carat Diamond Pearl White Gold Necklace
Located in Stamford, CT
1970's 8.5mm, 18-Inch cultured pearl necklace with double sided 18k white gold diamond catch
Category

Late 20th Century More Necklaces

Materials

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

12 Carat Opera Length Diamond Line Necklace
Located in Aspen, CO
Dramatic opera length double wire necklace adorned with approximately 12.12 carats of princess cut
Category

2010s American Contemporary More Necklaces

Materials

Diamond, 14k Gold

12 Carat Diamond White Gold 750 Necklace
Located in Lucerne, CH
Beautiful unique white gold 750 necklace with a safety clasp, bezel set with a stunning number of
Category

21st Century and Contemporary Italian Contemporary More Necklaces

Materials

White Diamond, Diamond, 18k Gold, White Gold

.12 Carat Diamond White Gold Open Heart Pendant Necklace
Located in Stamford, CT
Open heart diamond pendant necklace. 18k white gold open heart pendant with three floating diamonds
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

11 Carat Oval Tanzanite and 12 Carat Diamonds Necklace 18 Karat Gold Estate
Located in New York, NY
This extraordinary Necklace is consist of 7 Fine oval Tanzanite weighing approximately 11 Carats
Category

20th Century Drop Necklaces

Materials

Diamond, Tanzanite, 18k Gold

Tiffany & Co Paloma Picasso .12 Carat Diamond Platinum Heart Pendant Necklace
By Paloma Picasso for Tiffany & Co.
Located in Stamford, CT
Iconic Tiffany & Co Paloma Picasso diamond heart pendant necklace. 17 round brilliant cut diamonds
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Platinum

12 Carat Round Brilliant Diamonds By The Yard Necklace Certified
Located in New York, NY
Our Earth Mined Diamonds By The Yard Necklace for Ladies is the perfect way to add a touch of
Category

2010s American Link Necklaces

Materials

Diamond

Dainty Diamond Daisy Necklace .12 Carats in 14K Rose Gold, April Birthstone LV
By Gabriel & Co.
Located in Austin, TX
! The diamond is 0.12 carats at the center of the just over 1/4-inch (7 mm) diameter rose gold pendant
Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, Rose Gold

12 Carat Yellow and White Diamond Station Drop Necklace 18K Gold
Located in New York, NY
This luxurious design diamond drop necklace is simple but elegant. features Just under 4 carat
Category

Mid-20th Century Contemporary Pendant Necklaces

Materials

White Diamond, Yellow Diamond, 18k Gold

18-carat yellow gold necklace with a pendant 12 diamonds of 0.12 carats in total
Located in Monte-Carlo, MC
A necklace composed of a chain in 18-carat yellow gold and a rectangular pendant in 18-carat yellow
Category

20th Century Pendant Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

87.12 Carat Amethyst Necklace in 18 Karat Rose Gold with Diamonds
By Sunita Nahata
Located in Hong Kong, HK
amethyst necklace in 18K rose gold with diamonds. Amethyst: 61.040 carat octagon briollete shape - 12x10
Category

21st Century and Contemporary Hong Kong Contemporary Necklace Enhancers

Materials

Amethyst, Diamond, 18k Gold, Rose Gold

2.00 Carat Diamond Necklace G SI 14 Karat Yellow Gold 140 Diamonds 12 Grams
Located in New York, NY
2.00 Carat Natural Diamond Necklace G SI 14K Yellow Gold 16 inches 100% Natural Diamonds, Not
Category

21st Century and Contemporary American Contemporary Drop Necklaces

Materials

Diamond, Yellow Gold, 14k Gold

Vintage 12 Carat NO HEAT GIA Sapphire and Diamond Gold Brooch Pendant Necklace
Located in Montreal, QC
approx. 12 Carats. GIA report #2235104643. Surrounded by RBC Diamonds, weighing approx. 2.85tcw
Category

21st Century and Contemporary Modern Pendant Necklaces

Materials

Diamond, Sapphire, Gold, 14k Gold, White Gold, Platinum

12 Carat Tanzanite Cabochon and Diamond Drop Necklace in Yellow and White Gold
By Sarosi By Timeless Gems
Located in Los Angeles, CA
This pendant features a beautiful 12.56 carat tanzanite cabochon with the rich, lavendar-blue color
Category

21st Century and Contemporary American Artisan Drop Necklaces

Materials

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

12 Carat Citrine and Diamond Gold Slide Pendant Necklace Estate Fine Jewelry
Located in Montreal, QC
Simply Fabulous, Timeless and Finely detailed Citrine and Diamond Gold Slide Pendant. Centering a securely nestled 12Carat Citrine, accented by Diamonds weighing approx. 0.15tcw. Han...
Category

21st Century and Contemporary Modern Pendant Necklaces

Materials

Citrine, Diamond, Gold, 14k Gold, Yellow Gold

14k Brilliant '0.3 Carat' White Gold Necklace with Red Colored Stone
Located in Berlin, BE
Adorn yourself with this dazzling 14k white gold necklace that exudes pure elegance and
Category

20th Century Necklace Enhancers

Materials

White Gold

Tahiti 14/12 Beaded Necklace, 31 AAA Pearls
Located in Vannes, FR
. Each pearl, measuring 14 to 12 mm, represents a masterpiece of nature. The 18-carat white gold clasp
Category

21st Century and Contemporary French Modern Beaded Necklaces

Materials

Pearl, 18k Gold, 9k Gold, White Gold

1.65 Carat Diamond Platinum Art Deco Pendant Necklace
Located in Stamford, CT
Art Deco 1930's diamond pendant necklace. 22 transitioanl and baguette cut diamonds on a 16 inch
Category

Mid-20th Century Pendant Necklaces

Materials

Diamond, Platinum

.83 Carat Tanzanite Diamond Halo Platinum Pendant Necklace
Located in Stamford, CT
Tanzanite and diamond pendant necklace. Triangular shape tanzanite with a halo of round beaded
Category

21st Century and Contemporary Italian Pendant Necklaces

Materials

Diamond, Tanzanite, Platinum

1.30 Carat Diamond Platinum Retro Style Pendant Necklace
Located in Stamford, CT
Retro style 1960’s diamond platinum pendant necklace with round, pear and baguette cut diamonds
Category

Mid-20th Century Pendant Necklaces

Materials

Diamond, Platinum

Roman Malakov 12 millimeter South Sea Pearl and Round Diamond Pendant Necklace
By Roman Malakov
Located in New York, NY
This beautiful pearl necklace showcasing an 12 millimeter south sea pearl of golden color. Accented
Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Diamond, Pearl, South Sea Pearl, 18k Gold, White Gold

0.40 Carat Diamond/1.30 Carat Ruby 18 Karat Gold Hearts Pendant Necklace
By Sebastian Bernard
Located in Los Angeles, CA
18K Gold Heart shaped Pendant with 12 Invisible Set Princess Cut Rubies (Total Gem Weight 1.30 Ct
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold

12 Ct Emerald Cut Amethyst Pendant /Necklace + 14 Kt Yellow Gold Chain Vintage
Located in New York, NY
Approximately 12 Ct Emerald Cut Amethyst Pendant /Necklace + 14 Kt Yellow Gold Chain Vintage Chain
Category

Early 2000s Pendant Necklaces

Materials

Amethyst, 14k Gold, Yellow Gold

14 Karat Yellow Gold 1.06 Carat Diamond Bar Necklace
Located in Great neck, NY
features 12 Natural Round White Diamonds weighing 1.06 carats. Chain length is 18" inches. -14K Gold -12
Category

21st Century and Contemporary Chinese Contemporary Chain Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

334.50 Carats Multi Tourmaline Necklace Beaded Jewelry Natural Gemstone AAA+ gem
Located in Jaipur, RJ
12 MM Weight : 334.50 Carats Strand - 1
Category

2010s Nigerian Beaded Necklaces

Materials

Tourmaline

0.12 Carat Diamond 14K Gold Khanda Religious Sikhism Necklace
By Oshi Jewels
Located in Bangkok, TH
spirituality. We guarantee top-notch quality with 0.12-carat diamond beautifully set in this necklace. This
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

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

0.12 Carat Diamond 18K Gold Khanda Religious Sikhism Necklace
By Oshi Jewels
Located in Bangkok, TH
spirituality. We guarantee top-notch quality with 0.12-carat diamond beautifully set in this necklace. This
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

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

9.92 Carat Beryl Heliodor Amethyst Yellow Gold Pendant Necklace
Located in Stamford, CT
Beryl Heliodor and amethyst Art Deco style pendant necklace. Made from two bright yellow genuine
Category

21st Century and Contemporary Pendant Necklaces

Materials

Beryl, Amethyst, Gold, 14k Gold, Yellow Gold

1.65 Carat Diamond Round Emerald Cut Dangle Drop Necklace
Located in Stamford, CT
Round and Emerald cut diamond drop necklace. Emerald center stone with two dangle rows of round
Category

21st Century and Contemporary Drop Necklaces

Materials

Diamond, Gold, 14k Gold, White Gold

Peter Suchy .53 Carat Round Diamond Platinum Halo Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Antique inspired domed round diamond Slide pendant necklace. .53ct round cut center diamond in a
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Platinum

2.21 Carat Natural Multi Color Sapphire Rose Gold Chain Necklace
By DGI
Located in Los Angeles, CA
This necklace has 12 Multi Color Natural Sapphires that weigh 2.21 carats. They are Round Cut
Category

2010s American Contemporary Chain Necklaces

Materials

Sapphire, 14k Gold, Rose Gold

Natural Diamond 0.44 carats 18 Karat White Gold Chain Necklace
Located in Antwerpen, BE
full brilliance, adding a touch of magic to your ensemble. With a total carat weight of 0.44 carats
Category

2010s Belgian Modern Chain Necklaces

Materials

Diamond, White Gold

0.29 Carat Baguette Bar Chain Necklace 14 Karat White Gold
By Roshe Jewels
Located in Los Angeles, CA
Carats and 12 Round Cut Diamonds that weigh 0.16 Carats. The total carat weight is 0.29 Carats. (Clarity
Category

Early 2000s American Modern Chain Necklaces

Materials

Diamond, 14k Gold, White Gold

0.29 Carat Baguette Bar Chain Necklace 14 Karat Yellow Gold
By Roshe Jewels
Located in Los Angeles, CA
Carats and 12 Round Cut Diamonds that weigh 0.16 Carats. The total carat weight is 0.29 Carats. (Clarity
Category

Early 2000s American Modern Chain Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

0.29 Carat Baguette Bar Chain Necklace 14 Karat Rose Gold
By Roshe Jewels
Located in Los Angeles, CA
Carats and 12 Round Cut Diamonds that weigh 0.16 Carats. The total carat weight is 0.29 Carats. (Clarity
Category

Early 2000s American Modern Chain Necklaces

Materials

Diamond, Rose Gold, 14k Gold

5.46 Carat Pear Emerald Diamond Pearl Onyx Pendant Necklace
Located in Stamford, CT
cabochon pear emerald Approximate 5.46 carats 12 rose cut diamonds Approximate .12 carats 19 Old European
Category

Early 20th Century Pendant Necklaces

Materials

Onyx, Pearl, Diamond, Emerald, Gold, 14k Gold, Yellow Gold

.925 Sterling Silver 1/6 Carat Diamond Heart Pendant Necklace
Located in New York, NY
Show her just how much you love her with this sweet sterling silver, 1/6 carat total weight diamond
Category

21st Century and Contemporary Indian Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Sterling Silver

.925 Sterling Silver 1/6 Carat Diamond Heart Pendant Necklace
.925 Sterling Silver 1/6 Carat Diamond Heart Pendant Necklace
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H 0.79 in W 0.6 in L 0.99 in
Chopard 1.98 Carats Total Happy Spirit Collection Diamond Pendant Necklace
By Chopard
Located in New York, NY
This gorgeous Chopard necklace is from the Happy Spirit Collection. The pendant is decorated with 2
Category

Early 2000s Swiss Modern Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

.925 Sterling Silver 1/10 Carat Diamond Heart Pendant Necklace
Located in New York, NY
necklace features a heart-shaped design, symbolizing love and affection. Twelve natural, round-cut diamonds
Category

21st Century and Contemporary Indian Modern Pendant Necklaces

Materials

Diamond, White Diamond, Sterling Silver

.925 Sterling Silver 1/10 Carat Diamond Heart Pendant Necklace
.925 Sterling Silver 1/10 Carat Diamond Heart Pendant Necklace
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H 0.12 in W 0.87 in L 0.99 in
14 Karat White Gold 1.06 Carat Diamond Curved Bar Necklace
Located in Great neck, NY
features 12 Natural Round White Diamonds weighing 1.06 carats. Chain length is 18" inches. -14K Gold -12
Category

21st Century and Contemporary Chinese Contemporary Chain Necklaces

Materials

Diamond, 14k Gold, White Gold

.925 Sterling Silver 1/10 Carat Diamond Heart Pendant Necklace
Located in New York, NY
Twelve delicate, sparkling diamonds adds extra twinkle to this beautiful heart pendant necklace
Category

21st Century and Contemporary Indian Modern Pendant Necklaces

Materials

Diamond, White Diamond, Silver, Sterling Silver

.925 Sterling Silver 1/10 Carat Diamond Heart Pendant Necklace
.925 Sterling Silver 1/10 Carat Diamond Heart Pendant Necklace
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H 0.91 in W 0.04 in L 0.71 in
.66 Carat Diamond Rose Gold Diamond by the Yard Necklace
Located in Stamford, CT
Round brilliant cut bezel set diamond by the yard 14k rose gold necklace. 16 inches. 12 round
Category

21st Century and Contemporary Chain Necklaces

Materials

Diamond, 14k Gold, Rose Gold, Gold

54 Carat Bezel Set Amethyst Gold Swirl Link Chain Necklace
Located in Stamford, CT
Early 1900's handmade 14k yellow amethyst necklace. 12 natural oval bezel set amethysts. 14k yellow
Category

Early 20th Century Link Necklaces

Materials

Amethyst, 14k Gold, Yellow Gold, Gold

Peter Suchy .58 Carat Oval Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Antique style diamond slide pendant necklace. Created in the Peter Suchy Workshop, antique inspired
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Platinum

0.11 Carat Diamonds 14K Gold Crescent Moon Islamic Pendant Necklace
By Oshi Jewels
Located in Bangkok, TH
quality with 0.11 carat diamonds which gives us a statement necklace. This Islam necklace can be
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

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

0.11 Carat Diamonds 18K Gold Crescent Moon Islamic Pendant Necklace
By Oshi Jewels
Located in Bangkok, TH
quality with 0.11 carat diamonds which gives us a statement necklace. This Islam necklace can be
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

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

Peter Suchy 36.16 Carat Amethyst Diamond White Gold Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Pear shape 36.16 carat amethyst and diamond pendant necklace. Pear shaped center amethyst with a
Category

21st Century and Contemporary Pendant Necklaces

Materials

Amethyst, Diamond, Gold, 14k Gold, White Gold

.85 Carat Yellow White Diamond Two-Tone Gold Drop Necklace
Located in Stamford, CT
carats 12 round diamonds .04 carats Star: 4 round diamonds .12 carats 4 yellow round diamonds .12 carats
Category

21st Century and Contemporary Drop Necklaces

Materials

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

2.00 Carat Diamond Necklace G SI 14 Karat White Gold
Located in New York, NY
2.00 Carat Natural Diamond Necklace G SI 14K White Gold 16 inches 100% Natural Diamonds, Not
Category

21st Century and Contemporary American Contemporary Drop Necklaces

Materials

Diamond, 14k Gold, White Gold

11 Carat Pear Shape Colombian Emerald and Diamond Pendant Necklace Enhancer
Located in New York, NY
Introducing our extraordinary pendant necklace enhancer featuring an approximately 11 carat pear
Category

2010s Pendant Necklaces

Materials

Diamond, Emerald, 18k Gold

1.85 Carat Sapphire Diamond Bar Chain Necklace 14 Karat White Gold
By Roshe Jewels
Located in Los Angeles, CA
Beautiful Yellow and Pink Sapphire and Diamond Necklace that sits perfectly! 12 Pink and Yellow
Category

2010s American Modern Chain Necklaces

Materials

Diamond, Sapphire, 14k Gold, White Gold

Natural Diamond 0.17 carats 18 KT Yellow Gold Chain Pendant Necklace
Located in Antwerpen, BE
Step into a world of enchantment with our "Radiant Cluster" pendant necklace, a breathtaking
Category

2010s Belgian Modern Chain Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

14K White Gold 2.0 Carat Diamond Double Loop Pendant Necklace
Located in New York, NY
White Diamonds Diamond Count: Total 25 Diamonds Includes 13 Baguette and 12 Princess-Cut Diamonds
Category

21st Century and Contemporary Indian Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

14K White Gold 2.0 Carat Diamond Double Loop Pendant Necklace
14K White Gold 2.0 Carat Diamond Double Loop Pendant Necklace
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H 0.79 in W 0.6 in L 0.79 in
21.77 Carat Pear Shape Emerald and 25.04 Carat Diamond Vine Necklace
Located in Houston, TX
This absolutely exquisite necklace features 21.77ct total weight in stunning pear shape, richly
Category

21st Century and Contemporary American Drop Necklaces

Materials

Diamond, Emerald, Platinum

Estate 3.6 Carat Diamond 12.9 Carat Blue Sapphire Bib Style Platinum Necklace
Located in Miami, FL
. -Diamond and sapphire bib-style estate necklace -11 Pear shaped blue sapphires 12.90 carats (estimated) -12
Category

21st Century and Contemporary Choker Necklaces

Materials

Diamond, Blue Sapphire, Platinum

.50 Carat Round Cabochon Ruby Diamond Pierced Engraved Platinum Pendant Necklace
Located in Stamford, CT
1930's Art Deco ruby and diamond pendant necklace. 1 beautiful round cabochon 14k yellow gold bezel
Category

Early 20th Century Pendant Necklaces

Materials

Diamond, Ruby, Platinum

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12 Carat Necklaces For Sale on 1stDibs

On 1stDibs, there are many options to choose from in our inventory of 12 carat necklaces. These distinct designs — crafted with great care and often made from Gold, 18k Gold and White Gold — can elevate any look. Our collection of these items for sale includes 70 vintage editions and 228 modern creations to choose from as well. Our inventory is broad and distinctive, with accessories on offer that were made as long ago as the 19th Century to those produced as recently as the 21st Century. There are many different pieces in our collection of 12 carat necklaces to choose from, but Contemporary and Modern 12 carat necklaces are of considerable interest. LB Exclusive, TJD and Alberto each produced beautiful examples of these items that are worth considering. While most can agree that any pick from our collection easily elevates most outfits, but the choice of Diamond versions from the 233 available is guaranteed to add a special touch to your ensemble. A selection of round cut, oval cut and pear cut can be found today on these pages. When shopping our range of 12 carat necklaces, you’ll find that there are less available pieces for men today than there are for women.

How Much are 12 Carat Necklaces?

Prices for 12 carat necklaces can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $222 and can go as high as $357,500, while 12 carat necklaces, on average, fetch $6,500.

Finding the Right Necklaces for You

We are fortunate to know much of the world’s long and dazzling history of necklaces, as this type of jewelry was so treasured that it was frequently buried with its owners.

Lapis lazuli beads adorned necklaces unearthed from the royal graves at the ancient Iraqi civilization of Sumer, while the excavation of King Tut’s burial chamber revealed a sense of style that led to a frenzy of Art Deco designs, with artisans of the 1920s seeking to emulate the elegant work crafted by Ancient Egypt’s goldsmiths and jewelry makers. 

In ancient times, pendant necklaces worn by royalty and nobles conferred wealth and prestige. Today, wearing jewelry is about personal expression: Luxury diamond necklaces exude confidence and can symbolize the celebratory nature of a deep romantic relationship, while paper-clip chain-link necklaces designed by the likes of goldsmith Faye Kim are firmly planted in the past as well as the present. Kim works exclusively with eco-friendly gold, and these fashionable, fun accessories owe to the design of 19th-century watch fobs. 

For some, necklaces are thought of as being a solely feminine piece, but this widely loved accessory has been gender-neutral for eons. In fact, just as women rarely took to wearing a single necklace during the Renaissance, men of the era layered chains and valuable pendants atop their bejeweled clothing. In modern times, the free-spirited hippie and counterculture movements of the 1960s saw costume-jewelry designers celebrating self-expression through colorful multistrand necklaces and no shortage of beads, which were worn by anyone and everyone. 

Even after all of these years, the necklace remains an irrefutable staple of any complete outfit. Although new trends in jewelry are constantly emerging, the glamour and beauty of the past continue to inform modern styles and designs. In a way, the cyclical history of the necklace differs little from its familiar looped form: The celebrated French jewelry house Van Cleef & Arpels found much inspiration in King Tut, and, now, their Alhambra collection is a go-to for modern royals. Vintage necklaces designed by David Webb — whose work landed him on the cover of Vogue in 1950, two years after opening his Manhattan shop — were likely inspired by the ornamental styles of ancient Greece, Mesopotamia and Egypt

On 1stDibs, browse top designers like Cartier, Tiffany & Co. and Bulgari, or shop by your favorite style, from eye-catching choker necklaces to understated links to pearl necklaces and more. 

Questions About 12 Carat Necklaces
  • 1stDibs ExpertFebruary 22, 2021
    The size of a 12 carat diamond is dependent on diamond cut. A 12 carat round diamond is roughly 15 mm in size.
  • 1stDibs ExpertNovember 1, 2023
    How many carats a tennis necklace is depends on the size and number of diamonds that it features. For example, a tennis necklace with 100, 0.1 carat diamonds would have a total weight of 100 carats, while one with 60, 0.2 carat diamonds would be 120 carats in total. Generally, the longer a tennis necklace is and the larger its gemstones are, the higher the total carat weight will be. Shop a range of tennis necklaces on 1stDibs.
  • 1stDibs ExpertNovember 6, 2023
    There is no hard-and-fast rule for how many carats a diamond necklace should be. On average, solitaire diamond necklaces range from 0.5 to 1 carat, but you can find pieces with larger and smaller stones. Tennis chains that feature continuous diamonds set into links usually have much higher total carat weights. For example, one might feature 60 individual diamonds, each 0.20 carats in size, for a total carat weight of 12.0 carats. Shop a wide range of diamond necklaces on 1stDibs.