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20 Karat Diamond Necklace

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20 Karat Diamond Accent Chain Necklace
By Coomi
Located in Secaucus, NJ
Chain necklace set in 20K yellow gold with 0.52cts diamond stations and paisley clasp detail
Category

21st Century and Contemporary Chain Necklaces

Materials

White Diamond, Yellow Gold

Vintage Purple Amethyst Diamond Necklace 14 Karat Gold Italian
By Harbor Diamonds
Located in New York, NY
14k made in Italy, approximately 10 g. 20" gold chain Amethyst 23 x 16.5 mm, approximately 25 cts
Category

Antique Early 1900s Italian Contemporary Pendant Necklaces

Materials

Amethyst, Diamond, Gold, 14k Gold

20 Karat Emerald and Diamond Sunburst Necklace
By Coomi
Located in Secaucus, NJ
20K Coomi X Muzo Sunburst Necklace with 41.29cts emerald and 7.71cts diamond
Category

21st Century and Contemporary More Necklaces

Materials

Emerald, Yellow Gold

20 Karat Lapis Flower Necklace
By Coomi
Located in Secaucus, NJ
Affinity flower necklace set in 20K yellow gold with 438.21cts blue lapis and 3.96cts diamond.
Category

21st Century and Contemporary Beaded Necklaces

Materials

Lapis Lazuli, Yellow Gold

20 Karat Five Sunsets Necklace
By Coomi
Located in Secaucus, NJ
Affinity five sunsets necklace set in 20K yellow gold with 160.78cts multi-gemstone inlay, 78.22cts
Category

21st Century and Contemporary Beaded Necklaces

Materials

Lapis Lazuli, Yellow Gold

5.40 Carat Natural Diamond Buttercup Necklace 14 Karat White Gold 20''
Located in Great Neck, NY
Brilliant and beautiful buttercup necklace, natural round-brilliant cut white diamonds clean and
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

5.40 Carat Natural Diamond Buttercup Necklace 14 Karat White Gold 20''
Located in Great Neck, NY
Brilliant and beautiful buttercup necklace, natural round-brilliant cut white diamonds clean and
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

1.50 Carat Diamond Mini Illusion Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Brilliant and beautiful mini illusion setting necklace, natural round-brilliant cut white diamonds
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

1.50 Carat Diamond Mini Illusion Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Brilliant and beautiful mini illusion setting necklace, natural round-brilliant cut white diamonds
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

12.20 Carat Round Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Natural round-brilliant cut white diamonds clean and Excellent shine. 14k yellow gold classic four
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

12.20 Carat Round Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Natural round-brilliant cut white diamonds clean and Excellent shine. 14k yellow gold classic four
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

12.27 Carat Round Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Natural round-brilliant cut white diamonds clean and Excellent shine. 14k yellow gold classic four
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

12.27 Carat Round Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Natural round-brilliant cut white diamonds clean and Excellent shine. 14k yellow gold classic four
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

4.63 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold 20''
Located in Great Neck, NY
4.63 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold. Diamond Link 4 inch, Length 20
Category

2010s American More Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

4.63 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold 20''
Located in Great Neck, NY
4.63 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold. Diamond Link 4 inch, Length 20
Category

2010s American More Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

20 Karat Aquamarine and Opal Statement Necklace
By Coomi
Located in Secaucus, NJ
Diamonds. Necklace measures at 16inches with a 2inch extender. 15.49cts Opals 126.85cts Aquamarine
Category

2010s Thai Contemporary More Necklaces

Materials

Aquamarine, Diamond, Opal, Gold, 18k Gold, 22k Gold

4.65 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold 20''
Located in Great Neck, NY
4.65 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold. Diamond Link 4 inch, Length 20
Category

2010s American More Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

4.65 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold 20''
Located in Great Neck, NY
4.65 Carats Mini Diamond Tennis Necklace Chain 14 Karat White Gold. Diamond Link 4 inch, Length 20
Category

2010s American More Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

36.50 Carats Diamonds Cuban Two-Tone Necklace Chain 14 Karats Gold 20''
Located in Great Neck, NY
36.50 Carats Total Weight Heavy Gold Cuban Necklace Chain 14 Karats Gold 20 inch, 15 mm wide
Category

2010s American Chain Necklaces

Materials

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

36.50 Carats Diamonds Cuban Two-Tone Necklace Chain 14 Karats Gold 20''
Located in Great Neck, NY
36.50 Carats Total Weight Heavy Gold Cuban Necklace Chain 14 Karats Gold 20 inch, 15 mm wide
Category

2010s American Chain Necklaces

Materials

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

20.30 Carats Diamonds Cuban Two-Tone Necklace Chain 14 Karats Gold 20''
Located in Great Neck, NY
20.30 Carats Total Weight Heavy Gold Cuban Necklace Chain 14 Karats Rose Gold Two Tone Rose and
Category

2010s American Chain Necklaces

Materials

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

20.30 Carats Diamonds Cuban Two-Tone Necklace Chain 14 Karats Gold 20''
Located in Great Neck, NY
20.30 Carats Total Weight Heavy Gold Cuban Necklace Chain 14 Karats Rose Gold Two Tone Rose and
Category

2010s American Chain Necklaces

Materials

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

6 Carat Buttercup Round Brilliant Diamond Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Brilliant and beautiful buttercup necklace, natural round-brilliant cut 14k yellow gold buttercup
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

3.85 Carat Round Brilliant Diamond Illusion Necklace 14 Karat White Gold 20''
Located in Great Neck, NY
Brilliant and beautiful illusion setting necklace, natural round-brilliant cut white diamonds clean
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

3.85 Carat Round Brilliant Diamond Illusion Necklace 14 Karat White Gold 20''
Located in Great Neck, NY
Brilliant and beautiful illusion setting necklace, natural round-brilliant cut white diamonds clean
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

Deep Blue Aquamarine and Diamond Necklace Set in 20 Karat Yellow Gold
By Coomi
Located in Secaucus, NJ
Affinity Aquamarine and Diamond Necklace Set In 20 Karat Yellow Gold With 12.70 Carat Aquamarine
Category

21st Century and Contemporary Thai Contemporary Chain Necklaces

Materials

Aquamarine, Diamond, Yellow Gold

14 Karat Yellow Gold Hammered Link Necklace 31.24 Grams
By Harbor Diamonds
Located in New York, NY
14 Karat Yellow gold hammered link necklace weighing 31.24 grams, 20 inches long. Match bracelet
Category

2010s Contemporary Link Necklaces

Materials

14k Gold, Yellow Gold

8.05 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat yellow Gold 20''
Located in Great Neck, NY
Beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent shine
Category

2010s American Chain Necklaces

Materials

Diamond, Yellow Gold

8.05 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat yellow Gold 20''
Located in Great Neck, NY
Beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent shine
Category

2010s American Chain Necklaces

Materials

Diamond, Yellow Gold

22.35 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
High beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent
Category

2010s American Chain Necklaces

Materials

Diamond, Yellow Gold

22.35 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
High beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent
Category

2010s American Chain Necklaces

Materials

Diamond, Yellow Gold

6 Carat Buttercup Round Brilliant Diamond Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
Brilliant and beautiful buttercup necklace, natural round-brilliant cut 14k yellow gold buttercup
Category

2010s American Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

8.10 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat yellow Gold 20''
Located in Great Neck, NY
Beautiful quality tennis necklace, round-brilliant cut white diamonds and Excellent shine. 14k
Category

2010s American Chain Necklaces

Materials

Diamond, Yellow Gold

8.10 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat yellow Gold 20''
Located in Great Neck, NY
Beautiful quality tennis necklace, round-brilliant cut white diamonds and Excellent shine. 14k
Category

2010s American Chain Necklaces

Materials

Diamond, Yellow Gold

8.12 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat yellow Gold 20''
Located in Great Neck, NY
Beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent shine
Category

2010s American Chain Necklaces

Materials

Diamond, Yellow Gold

5.47 Carat Diamond Lemon Tree Necklace Set in 20 Karat Yellow Gold
By Coomi
Located in Secaucus, NJ
One Of A Kind Tree Necklace with Rose-Cut Diamonds, Lemon Quartz, and 20K Yellow Gold. The Necklace
Category

21st Century and Contemporary Thai Modern Drop Necklaces

Materials

Diamond, Yellow Gold

$20 1904 Liberty Coin in 14 Karat Yellow Gold Diamond Bezel Necklace
Located in Scottsdale, AZ
Designer: custom Material: 14K/24K yellow gold Diamonds: 40 round brilliant cut = 1.50cttw Color: H
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, 24k Gold, Yellow Gold

Lapis Lazuli Diamond 14 Karat Gold Pendant Necklace
Located in Wallkill, NY
14K gold Lapis Lazuli Pendant featuring 1 Carat of Brilliant cut accent diamonds surrounding the 3
Category

Vintage 1980s Italian Necklace Enhancers

Materials

Diamond, Lapis Lazuli, 14k Gold

Maharaja 20 Carat Fancy Cut Diamond Necklace Pendant
By Mehnaz Durrani
Located in Richmond, BC
Maharaja inspired, diamond necklace. Handcrafted contemporary fancy cut, tabular cut 20 carats
Category

21st Century and Contemporary Canadian Contemporary Pendant Necklaces

Materials

Diamond, Gold Plate, Silver

8.12 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat yellow Gold 20''
Located in Great Neck, NY
Beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent shine
Category

2010s American Chain Necklaces

22.46 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
High beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent
Category

2010s American Chain Necklaces

22.46 Carat Brilliant Cut Diamond Tennis Necklace 14 Karat Yellow Gold 20''
Located in Great Neck, NY
High beautiful quality tennis necklace, round-brilliant cut white diamonds clean and Excellent
Category

2010s American Chain Necklaces

Coomi 20 Karat Gold Luminosity Diamond Pendant
By Coomi
Located in Secaucus, NJ
strategically set in 20-karat yellow gold to reflect light while radiating the positive energy of the wearer
Category

Antique 15th Century and Earlier Thai Artisan Pendant Necklaces

Materials

White Diamond, Gold

Rose De France Diamond Halo Paperclip Pendant Necklace 22.60 Carats 14KT Gold
By Harbor Diamonds
Located in New York, NY
14 Karat Rose gold pendant featuring one Rose De France emerald cut weighing 22.11 carats flanked
Category

2010s Contemporary Pendant Necklaces

Materials

Amethyst, Diamond, Gold, 14k Gold, Rose Gold

20 Carat SI Clarity HI Color Marquise Pear Diamond Necklace 18 Karat White Gold
Located in IN
Diamond Necklace. Meticulously crafted in 18 Karat White Gold, this exquisite piece of fine jewelry is
Category

21st Century and Contemporary Indian Modern Drop Necklaces

Materials

Diamond, 18k Gold, White Gold

20 Carat SI Clarity HI Color Marquise Pear Diamond Necklace 14 Karat White Gold
Located in IN
This diamond necklace is a true statement piece, embodying luxury and extravagance. Whether worn
Category

21st Century and Contemporary Indian Modern Drop Necklaces

Materials

Diamond, White Gold, 14k Gold

4.75 Carats Sapphire Tennis Necklace 14 Karat White Gold 20''
Located in Great Neck, NY
SAPPHIRE TENNIS NECKLACE WHITE GOLD 14K, 20 INCH, 1.5 MM WIDE. All sapphire are natural, not
Category

2010s American More Necklaces

Materials

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

4.75 Carats Sapphire Tennis Necklace 14 Karat White Gold 20''
Located in Great Neck, NY
SAPPHIRE TENNIS NECKLACE WHITE GOLD 14K, 20 INCH, 1.5 MM WIDE. All sapphire are natural, not
Category

2010s American More Necklaces

Materials

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

Rough Diamond Necklace in 18 Karat Yellow Gold
By Artisan NYC
Located in New York, NY
Wear this subtle looking rough diamond two row necklace in 18K Yellow Gold and look gorgeously
Category

21st Century and Contemporary Indian Modern Beaded Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

Diamond Necklace 18 Karat White Gold
Located in Geneva, CH
Diamond Pendant Necklace 18 Katat Add a touch of sparkle and shine to any outfit with this
Category

Early 2000s Drop Necklaces

Materials

Diamond, White Gold

1.50 Carat Diamond by The Yard Necklace G SI 14 Karat White Gold 20 Pointers
Located in New York, NY
1.50 Carat Diamond by the Yard Necklace G SI 14K White Gold 20 pointers 18 inch 100% Natural
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Diamond, 14k Gold, White Gold

9.60 Carat Diamond by the Yard Necklace G SI 14 Karat White Gold 20 Pointers
Located in New York, NY
9.60 Carat Diamond by the Yard Necklace G SI 14K White Gold 18 inches 100% Natural Diamonds, Not
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Diamond, 14k Gold, White Gold

21 Carats Pink Sapphire Tennis Necklace 14 Karat White Gold 20''
Located in Great Neck, NY
21 CARATS NATURAL PINK SAPPHIRE TENNIS NECKLACE WHITE GOLD 14K 20 INCH. 3.2MM WIDE. All sapphire
Category

2010s American More Necklaces

Materials

Pink Sapphire, Diamond, 14k Gold, White Gold

14 Karat White Gold Diamond Station Necklace
Located in Washington Depot, CT
Vintage 14 Karat White Gold Diamond Station Necklace- This elegant station necklace features 20
Category

20th Century Link Necklaces

Materials

Diamond, White Gold

Exquisite 161.53 Carat Rose Quartz Necklace Set in 20 Karat Yellow Gold
By Coomi
Located in Secaucus, NJ
. The Necklace and Individual Stones Are Designed On A 20 Karat Yellow Gold Chain With A Clasp.
Category

21st Century and Contemporary Thai Contemporary Chain Necklaces

Materials

Aquamarine, Diamond, Quartz, Yellow Gold

18 Karat White Gold Diamond Snowflake Necklace
Located in Los Angeles, CA
This snowflake inspired necklace is crafted in 18-karat white gold, featuring 34 round white
Category

2010s American Chain Necklaces

Materials

Diamond, White Gold

Bulgari Bvlgari 20 Karat Yellow Gold Diamond Heart Pendant
By Bulgari
Located in Sherman Oaks, CA
Baguette Diamonds Total Mass = 5.9 grams Width = 24 mm Length = 20 mm (25 mm w/ Bail) Signed "BULGARI 20K
Category

20th Century Pendant Necklaces

Materials

Diamond, 18k Gold, 22k Gold

14 Karat White Gold Diamond Pendant Necklace
Located in Washington Depot, CT
14 Karat White Gold Diamond Pendant Necklace- This sparkling pendant necklace features 25 round
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

14 Karat White Gold Diamond Pendant Necklace
Located in Washington Depot, CT
14 Karat White Gold Diamond Pendant Necklace- This sparkling pendant necklace features seven
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

14 Karat White Gold Diamond Pendant Necklace
Located in Washington Depot, CT
14 Karat White Gold Diamond Pendant Necklace- This sparkling pendant features three round
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

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20 Karat Diamond Necklace For Sale on 1stDibs

On 1stDibs, you can find the most appropriate 20 karat diamond necklace for your needs in our varied inventory. Every item for sale was constructed with extraordinary care, often using Gold, Yellow Gold and 18k Gold. 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 20 karat diamond necklace may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 15th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. For this particular accessory, there are many different carat weights to choose from, but .5 Carat and 1 Carat versions are of considerable interest. Finding an appealing 20 karat diamond necklace — no matter the origin — is easy, but LB Exclusive, Cartier and Coomi each produced a popular version that is worth a look. A 20 karat diamond necklace can be a stylish choice for most occasions, but Diamond rings, from our inventory of 1332, can add a particularly distinctive touch to your look, day or night. 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 brilliant cut and oval cut alternatives. There aren’t many items for men if you’re seeking a 20 karat diamond necklace, as most of the options available are for women and unisex.

How Much is a 20 Karat Diamond Necklace?

The price for a 20 karat diamond necklace starts at $89 and tops out at $190,000 with these necklaces, on average, selling for $2,004.

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.