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21 Inch Diamond Necklace

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21 Inch Diamond Tennis Necklace In White Gold , 4 , 6 TCW
Located in Miami, FL
Beautiful white gold tennis necklace with 4.6 tcw of white round brilliant diamonds ( color J-K
Category

21st Century and Contemporary Unknown Choker Necklaces

Materials

Diamond, White Gold

Golden South Seas Pearl Necklace with Diamond and Gold Accents, 21 Inches
By Sarosi By Timeless Gems
Located in Los Angeles, CA
this luxurious necklace that will turn heads wherever you go! Finished length 21 inches Round
Category

21st Century and Contemporary Artisan Beaded Necklaces

Materials

Diamond, White Diamond, South Sea Pearl, Cultured Pearl, Gold, 14k Gold,...

21 Carats + Fancy Shape Diamond By the Yard Necklace in Platinum 36 inches
Located in La Jolla, CA
) apart. Necklace measures 36 inches long and weighs 21.7 grams. Total diamond weight is 21 carats
Category

21st Century and Contemporary North American Chain Necklaces

Materials

Diamond, Platinum

AJD Elegant faceted Ruby beaded necklace with goldy accents 21 Inches.
By Aria Jewelry Design
Located in Raleigh, NC
21 Inch necklace of faceted ruby, 9.5mm, with goldy accents. The gorgeous necklace is just perfect
Category

21st Century and Contemporary American Artisan Beaded Necklaces

Materials

Diamond, Ruby, 14k Gold, Yellow Gold, Vermeil

AJD 21 Inch Green Beryl/Emerald Graduated Faceted Necklace Perfect Gift!
By Aria Jewelry Design
Located in Raleigh, NC
21 Inch sparkling green Green Beryl/Emerald necklace. Green enhances everything and this necklace
Category

21st Century and Contemporary American Artisan Beaded Necklaces

Materials

Beryl, Diamond, Emerald, Lapis Lazuli, Green Beryl, 14k Gold, Vermeil

AJD 21 Inch Iridescent Deep Blue/Green 10MM Pearl necklace Great Gift!
By Aria Jewelry Design
Located in Raleigh, NC
10MM Blue/Green Iridescent Pearl necklace with flashes of purple. This 21-inch gorgeous pearl
Category

21st Century and Contemporary American Artisan Beaded Necklaces

Materials

Diamond, Pearl, Sterling Silver, Mixed Metal

Tiffany & Co. 21 Station Hinged Diamond Necklace
By Tiffany & Co.
Located in Bethesda, MD
From Tiffany & Co. thier 21 station diamond necklace. The diamonds are bezel set with slightly
Category

21st Century and Contemporary Choker Necklaces

Materials

Diamond, Platinum

14K Yellow Gold .21 CTW Diamond Hamsa Necklace
Located in Stuart, FL
14k yellow gold .21 CTW diamond hamsa necklace. The pendant comes on a cable chain, the diamonds
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

AJD 21 Inch 2 Strand Graduated Light Pink Pearl Necklace Great Gift
By Aria Jewelry Design
Located in Raleigh, NC
21 Inch traditional 2 strand pearl necklace. These soft pink pearls are complementary to all skin
Category

21st Century and Contemporary American Artisan Multi-Strand Necklaces

Materials

Diamond, Pearl, Brass

.71 Carat Total Diamond and Diamond Halo Necklace in Platinum, 17 Inches
By Sarosi By Timeless Gems
Located in Los Angeles, CA
with a halo of 21 round brilliant cut diamonds for even more sparkle! This necklace was handmade by our
Category

21st Century and Contemporary American Artisan Chain Necklaces

Materials

Diamond, White Diamond, Platinum

14K Two Toned .21 CTW Diamond Open Square Necklace
Located in Stuart, FL
14k two toned .21 CTW diamond open square necklace. The diamonds in this necklace are all round
Category

21st Century and Contemporary Drop Necklaces

Materials

Diamond, 14k Gold, White Gold, Yellow Gold

18K Rose Gold 21 Carat Diamond Link Chain Necklace
Located in New York, NY
18K Rose Gold 21 Carat Diamond Link Chain Necklace. Crafted out of 18K rose gold, every paperclip
Category

20th Century American Modern Chain Necklaces

Materials

Diamond, 18k Gold, Rose Gold

18K Yellow Gold 21 Carat Diamond Link Chain Necklace
Located in New York, NY
18K Yellow Gold 21 Carat Diamond Link Chain Necklace. Crafted out of 18K rose gold, every paperclip
Category

20th Century American Modern Chain Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

AJD Double Strand of Bronzy Pearl Necklace Goldy Accents 21 Inches Great Gift
By Aria Jewelry Design
Located in Raleigh, NC
overtones of blue, pink, green, and yellow. Wow! The double strands are 25 inch and 21 inches in length
Category

21st Century and Contemporary American Artisan Multi-Strand Necklaces

Materials

Diamond, Pearl, Vermeil, Mixed Metal

14K White Gold .21 CTW Diamond Star of David Pendant Necklace
Located in Stuart, FL
14k white gold .21 CTW diamond Star of David pendant necklace. The diamonds in the pendant are all
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

21 Carat Tennis Necklace in with 3-Prong Set Round Diamonds
By Antinori Fine Jewels
Located in Rome, IT
This stunning and impressive Riviera Necklace features substantial Diamond weight of 21 Carats in
Category

2010s Italian Modern Link Necklaces

Materials

Diamond, White Diamond, 18k Gold, White Gold

TJD 0.15Carat Diamond 18 Karat Rose Gold Flowery Key Necklace with 18 inch Chain
By TJD
Located in New York, NY
in 18 KT rose gold and accentuated with 21 round diamonds. This pendant suspends along with 18-inch
Category

2010s Indian Modern More Necklaces

Materials

Diamond, Rose Gold

7.05 Carat Natural Diamond Necklace 14 Karat White Gold G-H SI 21 Grams
Located in New York, NY
7.05 Carat Natural Diamond Necklace 14K White Gold G SI 16 inches 100% Natural Diamonds, Not
Category

21st Century and Contemporary American Contemporary Chain Necklaces

Materials

Diamond, 14k Gold, White Gold

25.00ct Diamond Necklace
Located in New York, NY
measures 21 1/2 inches in length and 4mm in width. The necklace is stamped 14K and weighs 38.2 grams
Category

20th Century More Necklaces

Materials

Diamond, 14k 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

Akoya Pearl Necklace 21" 14k Gold 8 mm AAA Certified
Located in Brooklyn, NY
Fine Quality Akoya Pearl Necklace 21" 14k Gold 8 mm AAA Certified $3,950 215644 Custom-made
Category

2010s American Beaded Necklaces

Materials

Pearl, 14k Gold

Diamond Starburst Cultured Pearl White Gold Pendant Necklace
Located in Boca Raton, FL
Beautiful starburst diamond cultured pearl pendant fashioned in 14 karat white gold. The round
Category

21st Century and Contemporary Unknown Modern Pendant Necklaces

Materials

Diamond, Cultured Pearl, White Gold

Diamond Starburst Cultured Pearl White Gold Pendant Necklace
Diamond Starburst Cultured Pearl White Gold Pendant Necklace
Free Shipping
W 0.75 in Dm 0.75 in L 0.75 in
Pink Sapphire and Diamond Square Pendant Necklace in 18K Gold
Located in Towson, MD
, and forty-eight (48) brilliant cut diamonds, approximately 1.00-carat total weight with matching H/I
Category

21st Century and Contemporary Italian Contemporary Pendant Necklaces

Materials

Diamond, Pink Sapphire, 18k Gold, White Gold

Akoya Pearl Diamond Gold Necklace
Located in Stamford, CT
82 round Akoya pearl Necklace with an 18k white gold ball accented with 21 round diamonds. 30
Category

21st Century and Contemporary More Necklaces

Materials

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

13.96ct Diamond by the Yard Necklace
Located in New York, NY
measures 4.5mm in width and 21 inches in length. The necklace weighs 14.7 grams. Inventory #14538OEBS
Category

20th Century More Necklaces

Materials

Diamond, Platinum

Ruby & Diamond Bar Necklace in Gold
Located in Bloomington, MN
clarity diamonds. The necklace features a radiant, modern bar design measuring 1.6x.75 inches, elegantly
Category

21st Century and Contemporary Modern Drop Necklaces

Materials

Diamond, Ruby, Gold, 14k Gold

Raymond Yard Aquamarine Diamond Pendant Necklace
By Raymond C. Yard
Located in New York, NY
Raymond Yard necklace featuring a stunning emerald-cut aquamarine, weighing approximately 21 carats
Category

20th Century Pendant Necklaces

Materials

Aquamarine, Diamond, Platinum

Golden South Sea and Diamond Necklace
Located in Great Neck, NY
. The size of the pearls is 10.2-14.8 mm. The length of this necklace is 21 inches total, adjustable
Category

21st Century and Contemporary American Modern Rope Necklaces

Materials

Diamond, Pearl, Cultured Pearl, 18k Gold

Magnificent Colombian Emerald and Diamond Necklace
Located in Lucerne, CH
, embellished with 21 briolette-cut diamonds totalling approximate 29 carats. Finished with 336 diamond
Category

Late 20th Century Unknown Art Deco Drop Necklaces

Materials

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

Edwardian Sapphire and Diamond Platinum Necklace
Located in Seattle, WA
to all the pieces. This platinum Edwardian 2.78ctw sapphire and 4.87ctw diamond necklace is unique
Category

Early 20th Century Edwardian Pendant Necklaces

Materials

Diamond, Sapphire, Platinum

Diamond by The Yard Gold Necklace
Located in Beverly Hills, CA
A unique styled “Diamonds by the Yard” necklace featuring large fancy cut diamonds! The 35-inch
Category

21st Century and Contemporary American Chain Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

Gubelin Baroque Pearl 6.00ct Diamond Gold Necklace
Located in New York, NY
. The color of these diamonds is E-F with VS clarity. The necklace measures 21 inches in length and
Category

20th Century Drop Necklaces

Materials

Diamond, Pearl, 18k Gold

Pink Sapphire Faceted Bead and Diamond Necklace
Located in Miami, FL
set with diamonds weighing 0.75 carat. The gross weight of the necklace is 21 grams, with a length of
Category

Late 20th Century American Modern Beaded Necklaces

Materials

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

Antonini Gem Peridot Diamond Platinum Pendant Necklace
By Antonini Gioielli
Located in New York, NY
set with 21 brilliant cut diamonds. The pendant is extended from a platinum link chain measuring 27
Category

2010s Italian Contemporary Pendant Necklaces

Materials

Diamond, Peridot, Platinum

Cultured Baroque Pearl and Diamond Lariat Necklace
Located in Chicago, IL
diamond clasp, allowing the necklace to be worn at different lengths. Can be worn with a casual button up
Category

1990s Beaded Necklaces

Materials

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

9.40ct. Natural Emeralds Diamonds Yard Necklace 14kt
Located in New York, NY
G-color Vs-2 Clarity 4.4 grams / 14kt yellow gold. 21 inches long (we may adjust at request
Category

2010s American Chain Necklaces

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

Antique Important Diamond Silver on Gold Necklace
Located in New York, NY
contrast in brilliance, color and fire in this exquisite necklace. The 21 larger Old European cut diamonds
Category

Antique 1870s British Early Victorian Drop Necklaces

Materials

Diamond, Gold, Silver

Gemlok Diamond Mother of Pearl Gold Necklace
By Gemlok
Located in Stamford, CT
Authentic Gemlok diamond and mother of pearl 18k yellow gold necklace made exclusively for Spitzer
Category

Late 20th Century More Necklaces

Materials

Diamond, Gold, 18k Gold, Yellow Gold

.91 Carat Diamond White Gold Pendant Necklace
Located in Stamford, CT
Four trilliant diamond clustered pendant necklace. Center diamonds surrounded with a halo of round
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Gold, 14k Gold, White Gold

10 Karat White Gold and Diamond Pendant Necklace
Located in Washington Depot, CT
diamond weight: .15 ct. Diamond color: I Diamond clarity: I2 Size: 17.5 inches (necklace) 21 mm x 3 mm
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

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

20th Century Pendant Necklaces

Materials

Diamond, White Gold

14 Karat Yellow Gold and Diamond Pendant Necklace
Located in Washington Depot, CT
Vintage 14 Karat Yellow Gold and Diamond Pendant Necklace- This sparkling pendant features 3
Category

20th Century Pendant Necklaces

Materials

Diamond, Yellow Gold

14 Karat White Gold Diamond Cross Pendant Necklace
Located in Washington Depot, CT
14 Karat White Gold Diamond Cross Pendant Necklace- This sparkling cross features 47 round
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

14 Karat White Gold Diamond Pendant Necklace #15501
Located in Washington Depot, CT
Vintage 14 Karat White Gold Diamond Pendant Necklace- This sparkling pendant features ten round
Category

20th Century Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

1.05ct Open Heart Natural Diamonds Necklace 14 Karat
Located in New York, NY
clarity Pendant Measurements: 21 x20mm 18 inch necklace Total 4.8 grams 14kt. white gold
Category

2010s American Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

Vintage Pearl Necklace with Jade and Diamond Clasp
Located in London, GB
Length: 21" inches Pearls: 59 (9.5mm - 6.5mm) Jade Dimensions: 4mm Total Diamond Weight: Approx. 0.02ct
Category

20th Century Pendant Necklaces

Materials

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

Cameo, Pearl and Diamond 14 Karat Gold Bohemian Necklace
By Vicki Orr Designs
Located in Naples, FL
and antique cameos, freshwater Pearls and white Diamonds. Collar necklace is 19 inches in length, and
Category

2010s American Contemporary Link Necklaces

Materials

Freshwater Pearl, Pearl, White Diamond, Diamond, Carnelian, Gold, Yellow...

27 Carat Combined Mix Shape Diamond Necklace Certified
Located in New York, NY
Looking for a luxurious and elegant diamond necklace for that special person in your life? Look no
Category

2010s American Beaded Necklaces

Materials

Diamond, 14k Gold, White Gold

14 Karat White Gold Diamond Pendant Necklace #16749
Located in Washington Depot, CT
Size: 17 inches (necklace) 21 mm x 9 mm (pendant) Weight: 6.6 gr./ 4.1 dwt. Stamped: 14KT
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Diamond, Gold, 14k Gold, White Gold

14 Karat White Gold and Diamond Pendant Necklace
Located in Washington Depot, CT
. Diamond color: J Diamond clarity: I1 Size: 17.5 inches 21 mm x 24 mm (pendant) Weight
Category

20th Century Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

18 Karat White Gold and Diamond Starburst Necklace
Located in Washington Depot, CT
ct. Diamond color: I-J Diamond clarity: I1-I2 Size: 15-18 inches (adjustable) 21 mm x
Category

20th Century Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Vintage Ruby, Sapphire and Diamond Love Heart Necklace
Located in London, GB
Dimensions: 33mm x 31mm x 5.5mm Chain Length: 21 inches Chain Width: 3.3mm Box: Plain Gift Box
Category

20th Century Pendant Necklaces

Materials

Diamond, Ruby, Blue Sapphire, Gold, Yellow Gold

10kt Yellow Gold Ruby Diamond Necklace 17.5 In, 1.75cttw Rubies, .05cttw Diamond
Located in Rancho Santa Fe, CA
10kt Yellow Gold Ruby Diamond Necklace 17.5 In, 1.75cttw Rubies, .05cttw Diamond. This is a
Category

2010s Taiwanese Modern Pendant Necklaces

Materials

Diamond, Ruby, 10k Gold, Yellow Gold

14K Tourmaline & Diamond Pendant Necklace - Pear Shaped Pink Tourmaline
Located in Holtsville, NY
* Diamonds: * Carat Weight: 0.14 * Stone Count: 21 * Shape: Single Cut * Color Grade: Near Colorless
Category

2010s American Artist Pendant Necklaces

Materials

Diamond, Tourmaline, 14k Gold

14 Karat Two Tone Diamond Butterfly Pendant Necklace #13784
Located in Washington Depot, CT
: SI1-SI2 Size: 21 mm x 16 mm (pendant) 16 inches (necklace) Weight: 4.2 dwt. / 6.5 gr. Tested 14K
Category

20th Century Pendant Necklaces

Materials

Diamond, 14k Gold

18 Karat Yellow Gold and Diamond Cross Pendant Necklace
Located in Washington Depot, CT
. Approximate total diamond weight: .21 ct. Diamond color: F Diamond clarity: VS1 Size: 18 inches (necklace
Category

20th Century Pendant Necklaces

Materials

Diamond, Yellow Gold

18 Karat White Gold and Diamond Pendant Floral Necklace
Located in Washington Depot, CT
Vintage 18 Karat White Gold and Diamond Pendant Necklace- This sparkling 18K white gold necklace
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

14 Karat White Gold and Graduated Diamond Pendant Necklace
Located in Washington Depot, CT
inches (necklace) 21 mm x 3 mm (pendant) Weight: 1.9 dwt. / 3.0 gr. Stamped: JTW 14K Very good
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

14 Karat Yellow Gold Pearl and Diamond Pendant Necklace
Located in Washington Depot, CT
clarity: VS1 Size: 21 mm x 8 mm (pendant) 16.75 inches (necklace) Weight: 2.5 dwt. / 4.0 gr. Stamped
Category

20th Century Pendant Necklaces

Materials

Diamond, Pearl, Yellow Gold

14K Two Toned Diamonds By The Yard Necklace .75 CTW
Located in Stuart, FL
diamonds are set in a white gold bezel. The length of the necklace measures 21 inches, and the weight of
Category

21st Century and Contemporary Chain Necklaces

Materials

Diamond

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21 Inch Diamond Necklace For Sale on 1stDibs

Find the exact 21 inch diamond necklace you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using gold, 14k gold and white 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 21 inch 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 18th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. Finding an appealing 21 inch diamond necklace — no matter the origin — is easy, but Aria Jewelry Design, Sarosi By Timeless Gems and Tiffany & Co. each produced a popular version that is worth a look. While most can agree that any 21 inch diamond necklace from our collection can easily elevate most outfits, but the choice of a diamond version from the 469 available is guaranteed to add a special touch to your ensemble. 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 mixed cut alternatives. Most of our 21 inch diamond necklace for sale are for women, but there are 168 pieces available to browse for men.

How Much is a 21 Inch Diamond Necklace?

On average, a 21 inch diamond necklace at 1stDibs sells for $3,995, while they’re typically $140 on the low end and $500,000 for the highest priced versions of this item.

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 21 Inch Diamond Necklace
  • 1stDibs ExpertNovember 1, 2023
    There is no set number of diamonds on a 16-inch tennis necklace. The number of diamonds that make up a tennis chain often depends on the size of the gemstones. Generally, the larger the diamonds are, the fewer there are on a tennis necklace. On 1stDibs, explore a variety of tennis necklaces.