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48 Carat Diamond Necklace

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GIA Certified 48 Carat Riviera Diamond Platinum Necklace
By Antinori Fine Jewels
Located in Rome, IT
An exquisite 17' Tennis necklace in platinum with basket prong set 17' Tennis necklace in
Category

2010s Italian Modern Chain Necklaces

Materials

Diamond, Platinum

GIA Certified 48 Carat Riviera Diamond Platinum Necklace
By Antinori Fine Jewels
Located in Rome, IT
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Category

2010s Italian Modern Chain Necklaces

Materials

Diamond, Platinum

Necklace in 18 Carat White Gold 48 Multicolored Sapphires 53 Carat and Diamonds
Located in Paris, FR
Necklace in 18 Carat white Gold composed of 48 Beautiful Multicolored Sapphires alternated with
Category

Early 2000s French More Necklaces

Materials

Blue Sapphire, Pink Sapphire, Yellow Sapphire, Green Sapphire, Sapphire,...

0.67 Carat Natural Diamond Pear Shape Necklace
Located in New York, NY
100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond Necklace with 18'' chain 0.67CT
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Diamond, 14k Gold, White Gold

0.67 Carat Natural Diamond Pear Shape Necklace
0.67 Carat Natural Diamond Pear Shape Necklace
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H 0.38 in W 0.32 in L 18 in
Contemporary 57 Carat Diamond Cluster Necklace
Located in New York, NY
A timeless emblem of luxury, this Contemporary Diamond Cluster Necklace boasts an unparalleled
Category

21st Century and Contemporary American Contemporary Choker Necklaces

Materials

Diamond, 18k Gold

1 Carat Diamond 18 Carat White Gold Tire Necklace
Located in Paris, FR
Pendant necklace in white gold with an old-cut diamond in a tire setting. Estimated diamond weight
Category

Vintage 1980s French Modern Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

1 Carat Diamond 18 Carat White Gold Tire Necklace
1 Carat Diamond 18 Carat White Gold Tire Necklace
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D 0.18 in Dm 0.38 in
14K White Gold 2.00 Carat Diamond Journey Pendant Necklace
Located in New York, NY
Features: Diamond Type: Natural White Diamonds Diamond Count: Total 56 Diamonds Includes 8 Princess and 48
Category

21st Century and Contemporary Indian Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

14K White Gold 2.00 Carat Diamond Journey Pendant Necklace
14K White Gold 2.00 Carat Diamond Journey Pendant Necklace
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H 0.2 in W 0.28 in L 1.38 in
1.36 Carat Diamond White Gold Rectangular Modern Pendant Necklace
Located in Stamford, CT
Diamond pendant necklace. This rectangle shaped setting has three rows for 21 straight baguette
Category

Late 20th Century Pendant Necklaces

Materials

Diamond, Gold, 14k Gold, White Gold

.87 Carat Sapphire Pave Diamond Gold Heart Pendant Necklace
Located in Stamford, CT
Sapphire and diamond heart pendant necklace. 19 round sapphires with a heart shaped 18k white gold
Category

Late 20th Century Pendant Necklaces

Materials

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

0.44+0.35 Carats Diamonds 1.10 Carats Emeralds White Gold Pendant Necklace
Located in BARI, IT
with matching earrings. The necklace is 48 cm long, the pendant is 6 cm long.
Category

21st Century and Contemporary Italian Chain Necklaces

Materials

Diamond, Emerald, White Gold

Black Enamel Marquise Diamond Gold Platinum Bow Pendant Necklace
Located in Stamford, CT
Bow style Diamond and enamel platinum and white gold pendant necklace. 1 Marquise diamond with a
Category

Early 20th Century Necklace Enhancers

Materials

Diamond, Enamel, Platinum, White Gold, Gold, 14k Gold

Peter Suchy .64 Carat Pear Diamond Halo Platinum Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Domed antique style pear shaped Platinum slide pendant. .50ct pear shaped diamond, mounted in a
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, Platinum

9.00 Carat Aqua Ruby Diamond Rose Gold Pendant
Located in Stamford, CT
Retro Art Deco Aqua, diamond and ruby pendant. 9.00ct oval natural aqua set in 14k rose gold
Category

Early 20th Century Necklace Enhancers

Materials

Aquamarine, Diamond, Ruby, Rose Gold, Gold, 14k Gold

Important Diamond Necklace in 18k 28.41 Carats Total Weight
Located in Wailea, HI
Introducing a truly exquisite piece of jewelry: the Important Diamond Necklace in 18k with a
Category

Late 20th Century American More Necklaces

Materials

Diamond, 18k Gold

50 Carat Heart Shape Diamond Pendant Necklace Certified B
Located in New York, NY
unique and valuable piece of jewelry. Remy 50 Carat Brown Heart Necklace Brilliant Diamond Pendant
Category

2010s American Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

Peter Suchy 2.38 Carat Opal Diamond Halo Rose Gold Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Opal and diamond pendant necklace. Oval cabochon center opal with a halo of 18 round brilliant cut
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Opal, Gold, 14k Gold, Rose Gold

AGL Certified 3.481 Carat Pink Diamond Necklace
Located in Kowloon, HK
**100% NATURAL FANCY COLOUR DIAMOND JEWELRY** ✪ Jewelry Details ✪ ♦ MAIN STONE DETAILS ➛ Stone
Category

2010s Asian Multi-Strand Necklaces

Materials

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

Russian Antique Cross Necklace Diamonds 12.50 Carats Circa 1700’s
Located in Carlsbad, CA
Diamond = 12.50 Carats (Cut: Round, Color: F-G, Clarity: VS) Circa 1700 Made in russia Metal = Gold
Category

Antique 18th Century Russian Art Deco Pendant Necklaces

Materials

Diamond, White Diamond, Gold, Silver

Russian Antique Cross Necklace Diamonds 12.50 Carats Circa 1700’s
Located in Carlsbad, CA
Diamond = 12.50 Carats (Cut: Round, Color: F-G, Clarity: VS) Circa 1700 Made in russia Metal = Gold
Category

Antique 18th Century Russian Art Deco Pendant Necklaces

Materials

Diamond, White Diamond, Gold, Silver

Peter Suchy EGL Certified .69 Carat Diamond White Gold Slide Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Custom made oval Diamond halo slide pendant necklace. EGL certified near colorless, 69ct pear
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

18 carat white gold ruby and diamonds necklace
Located in Monte-Carlo, MC
18 carat white gold necklace designed with 1 oval ruby weighing 3.31 carat and 16 round brillant
Category

2010s Pendant Necklaces

Materials

Ruby, White Gold

Important Harry Winston Diamond 23 Carat Certified Emerald Pendant Necklace
By Harry Winston
Located in New York, NY
Important Harry Winston Diamond 23 Carat Certified Emerald Pendant Necklace An 18k gold and
Category

Vintage 1960s American Pendant Necklaces

Materials

Diamond, Emerald, 18k Gold, Platinum

0.80 Carat Natural Diamond Pendant Necklace 14 Karat White Gold G SI Chain
By David Morris
Located in New York, NY
0.80 Carat Natural Diamond Pendant Necklace 14K White Gold G SI 18'' chain 100% Natural Diamonds
Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

4, 1 Carat Amethyst 0, 86 Carats VS G Color Diamonds White Gold Necklace
By Leo Milano
Located in Milano, MI
boasts a central cabochon amethyst of 4.1 carat and VS G color diamonds 0,86 carats. the necklace is
Category

21st Century and Contemporary Italian Contemporary Pendant Necklaces

Materials

Amethyst, Diamond, White Gold, 18k Gold

William Goldberg 63 Carat Spectacular Diamond Infinity Necklace
By William Goldberg
Located in New York, NY
quality analysis: 48 of the diamonds were graded by GIA. Exceptional sparkle and brilliance! Total carat
Category

21st Century and Contemporary American Modern Multi-Strand Necklaces

Materials

Diamond, Platinum

Retro Gold 14.5 Carat Natural Diamond & Ruby Sapphire Emerald Cabochon Necklace
Located in Los Angeles, CA
Cabochon necklace set in 18k Yellow Gold. The piece is set with 48 colorless Round Brilliant diamonds
Category

Vintage 1980s North American Retro Chain Necklaces

Materials

Diamond, Emerald, Ruby, Sapphire, Gold

18 Carats VS E Quality Diamond 18 Karat White Gold Necklace Bridal Brand New
Located in New York, NY
18.5 Carats VS, E Diamond Necklace made in 18 Karat white gold . One of our premium necklace
Category

2010s Drop Necklaces

Materials

Diamond, 18k Gold, White Gold

9 Carat Baguette Brilliant Cut Princess Cut Diamond Drop Lariat Necklace
By Antinori Fine Jewels
Located in Rome, IT
Diamonds Halo Drop/Dangle Lariat Necklace. The necklace weighs 48.5 grams, 16.5" long, 3" Drop/Dangle, 7
Category

2010s Italian Modern Multi-Strand Necklaces

Materials

White Diamond, Diamond, 14k Gold, 18k Gold

8.41 Carat Round Brilliant Diamond Station Necklace 18 Karat in Stock
Located in Boca Raton, FL
18k Rose Gold 8.41ctw Round Brilliant Diamond Station Necklace Material: 18k Rose Gold Diamond
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, Rose Gold

Faye Kim Platinum Diamond Station Necklace
By Faye Kim
Located in Westport, CT
Classic and versatile, Faye Kim's Platinum and Diamond Station Necklace is a must have for every
Category

2010s American Contemporary Chain Necklaces

Materials

Diamond, Platinum

Opal Diamond Necklace, 14k Gold, 1 Carat Opal Diamond Halo Pendant w Cable Chain
By Five Star Jewelry
Located in Austin, TX
Diamond Number: 48 Diamond Shape: Round Brilliant Diamond Total Weight: .11 carat Diamond Clarity: VS2
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Opal, 14k Gold

GIA Certified Natural 42.02 Carat Blue Aquamarine Diamonds Necklace 14 Karat
Located in New York, NY
GIA Certified 42.02ct. Natural Aquamarine Necklace #2201404089 Oval Cut, Clean Clarity
Category

2010s American Pendant Necklaces

Materials

Aquamarine, Diamond, 14k Gold, White Gold

2.06 Carat Natural Purple Pink Sapphire Cluster Diamond Necklace 14 Karat
Located in New York, NY
1.16ct. Natural Sapphire Necklace Fine Purple Pink Color clean clarity & transparent Brilliant
Category

2010s American Pendant Necklaces

Materials

Diamond, Pink Sapphire, 14k Gold, White Gold

TJD 1.50 Carat Morganite & Diamond 14KT Gold Cushion Frame Halo Pendant Necklace
By TJD
Located in New York, NY
This beautiful halo pendant necklace is studded with 48 single cut, brilliant cut natural diamonds
Category

2010s Indian Contemporary Pendant Necklaces

Materials

Diamond, Morganite, 14k Gold, Gold, Rose 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

0.38 Carat Natural Diamond Star or David Pendant Necklace 14 Karat Gold G SI 18
Located in New York, NY
100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond Necklace 0.38CT G-H SI 14K
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Diamond, 14k Gold, White Gold

3.63 Carat Lavender Sapphire and Diamond Necklace in 18k White and Yellow Gold
By Sarosi By Timeless Gems
Located in Los Angeles, CA
measures 18 inches in length Lavender sapphire, 3.63 carats Round brilliant cut diamonds, .48 carat total
Category

21st Century and Contemporary American Artisan Drop Necklaces

Materials

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

TJD 0.15 Carat Black & White Diamond 14 Karat White Gold Circle Pendant Necklace
By TJD
Located in New York, NY
cut 48 white and black treated diamonds pave set, H-I color I2 clarity and a high polish finish
Category

2010s Indian Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

TJD 0.50 Carat Round & Baguette Diamond 14 Karat White Gold Scatter Bar Necklace
By TJD
Located in New York, NY
White gold and features Round Brilliant 48 and 20 baguette-cut white diamonds in Prong set, H-I color I2
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, White Gold

115 Ct Natural Carved Drop Emerald & 4 Ct Diamond Necklace 18 Kt Gold Necklace
Located in New York, NY
115 carats and 4 carats of solitaire diamonds. Crafted in 18 karat gold, the necklace showcases three
Category

2010s Drop Necklaces

Materials

Diamond, Emerald, 18k Gold

Platinum Large Dangling Baguette Round Diamond Pendant Double Tennis Necklace
Located in Boca Raton, FL
weight of diamonds: Apprx. 53.81 carat all F-G color, VS1 clarity. 463 total round diamonds. 48 straight
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, White Diamond, Platinum

Two beautiful Haute Joaillerie 18 carat white gold necklaces
Located in Monte-Carlo, MC
Two beautiful Haute Joaillerie 18 carat white gold necklaces designed with 138 round brillant cut
Category

2010s More Necklaces

Materials

Diamond, White Gold

Faye Kim 18 Karat Gold and Diamond Station Necklace
By Faye Kim
Located in Westport, CT
Diamonds .48 tcw Custom lengths available and the necklace can be made in other metals and finishes (see
Category

2010s American Contemporary Chain Necklaces

Materials

Diamond, Gold, 18k Gold

Antique 48 Carat Carnelian Jasper and 18k Yellow Gold Pendant
Located in Jesmond, Newcastle Upon Tyne
An exceptional, fine and impressive antique 1880s 48 carat carnelian jasper and 18 karat yellow
Category

Antique 19th Century Unknown Pendant Necklaces

Materials

Carnelian, Jasper, 18k Gold, Yellow Gold

1.35 Ct Diamond Leaf Necklace in 18K Gold
By Oshi Jewels
Located in Bangkok, TH
Diamond tree branch necklace, 18k gold, genuine diamond necklace, Nature lover necklace, unique
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

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

1.35 Ct Diamond Leaf Necklace in 18K Gold
1.35 Ct Diamond Leaf Necklace in 18K Gold
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H 0.26 in W 0.72 in
1.35 Ct Diamond Leaf Necklace in 14K Gold
By Oshi Jewels
Located in Bangkok, TH
Diamond tree branch necklace, 14k gold, genuine diamond necklace, Nature lover necklace, unique
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

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

1.35 Ct Diamond Leaf Necklace in 14K Gold
1.35 Ct Diamond Leaf Necklace in 14K Gold
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H 0.26 in W 0.72 in
2.42 Carat, 14 Karat Gold Diamond Cross Pendant
By Sebastian Bernard
Located in Los Angeles, CA
Diamonds with total weight of 2.42 Ct . Size 38 mm x 48 mm . Metal: 14K White Gold 9.9 gr. Round diamonds
Category

2010s American Neoclassical Pendant Necklaces

Materials

Diamond, 14k Gold

100 Carat Aquamarine Platinum and Diamond Pendant Tassle
Located in Stamford, CT
’). Suspended between platinum caps with leaf motif top and bottom and set with 48 diamonds weighing 1.31 total
Category

Antique Mid-19th Century Kenyan Pendant Necklaces

Materials

Aquamarine, Diamond, Platinum

GIA Certified 3 Stone Drop Diamond Necklace
Located in New York, NY
Stunning line up of super bright Diamonds beginning with a perfectly round brilliant cut diamond.48
Category

2010s American Pendant Necklaces

Materials

Diamond, Platinum

Gorgeous Retro Amethyst Diamond 18 KT Necklace
Located in Napoli, IT
work design set with round cut Amethyst and Diamond connecting each link Approx. 8.00 Carats of fine
Category

Vintage 1940s European Retro Link Necklaces

Materials

Amethyst, Diamond, 18k Gold

CARTIER Diamond White Gold Heart Pendant Necklace
By Cartier
Located in New York, NY
enhancer pendant set with 48 brilliant-cut round D-E-F VVS1-VVS2 diamonds weighing an estimated 0.70 carats
Category

1990s French Pendant Necklaces

Materials

Diamond, White Gold

Diamond Cross Necklace .68cttw 14k White Gold
Located in Sugar Land, TX
♥ Product Summary ♥ Main Stone: Diamond Approx. Diamond Carat Weight: .68cttw Diamond Color: G
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

Yellow Sapphire Diamond Necklace Pendant 18K White Gold 1.85 TDW
By Estate Jewelry
Located in East Brunswick, NJ
Yellow Sapphire Diamond Necklace Pendant 18K White Gold 1.85 TDW This amazing necklace is finely
Category

Late 20th Century Choker Necklaces

Materials

Diamond, Yellow Sapphire, 18k Gold, White Gold

Dalben Australian Opal Rose Cut Diamond Gold Necklace
By Laura Dalben
Located in Como, IT
Dalben design Opal pendant necklace with 5 blue-green Australian Opals and 2 rose cut Diamonds
Category

21st Century and Contemporary Italian Contemporary Drop Necklaces

Materials

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

Suzy Levian 14K White Gold White Diamond Interlocking Circle Solitaire Necklace
By Suzy Levian
Located in Great Neck, NY
diamonds totaling .48 cttw. This interlocking circle necklace can be perfect to wear alone or to stack with
Category

21st Century and Contemporary Chinese Contemporary Chain Necklaces

Materials

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

Diamond 18 Karat Gold Riviera Pendant Necklace
By Meghna Jewels
Located in Hoffman Estate, IL
Cast from 18-karat gold, this pendant necklace is hand set with .48 carats of sparkling diamonds on
Category

21st Century and Contemporary Unknown Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold

Unisex Akoya Pearl & Chain Necklace with Diamond New
Located in Southbury, CT
pieces. This 26" necklace is composed of 48 approximately 6.5 mm vintage cultured Akoya pearls. The
Category

2010s Artisan Beaded Necklaces

Materials

Diamond, Pearl

Necklace Two Rows of Pearls with 18 Carat Yellow Gold Clasp
Located in Paris, FR
Necklace two Rows of Pearls Diameter 8.5 mm to 9 mm with 18 Carat yellow Gold Clasp Paved with
Category

1990s Unknown Beaded Necklaces

Materials

Diamond, Cultured Pearl, 18k Gold

45.98ctw GIA Certified Cushion Cut Yellow & White Diamond Necklace in 18KT Gold
Located in New York, NY
Weight: 8.05ctw • Number of Marquise Diamonds: 48 • Carat Weight: 8.95ctw • Number of Oval Diamonds: 12
Category

2010s American Modern Choker Necklaces

Materials

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

Vintage Natural Green Emerald and Diamond Chain Necklace
Located in Denver, CO
color, VS-SI clarity. The necklace measures 48 inches long and the clasp is studded with diamonds
Category

Late 20th Century Unknown Contemporary Chain Necklaces

Materials

Diamond, Emerald, 18k Gold, White Gold

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48 Carat Diamond Necklace For Sale on 1stDibs

You are likely to find exactly the 48 carat diamond necklace you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using gold, white gold and 18k gold. In our selection of items, you can find a vintage example as well as a contemporary version. If you’re looking for a 48 carat diamond necklace from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 18th Century while another version may have been produced as recently as the 21st Century. There have been many well-made iterations of the classic 48 carat diamond necklace over the years, but those made by Cartier, Meghna Jewels and Alberto are often thought to be among the most beautiful. See these pages for a round cut iteration of this accessory, while there are also oval cut cut and brilliant cut cut versions available here, too. When shopping for a 48 carat diamond necklace, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a 48 Carat Diamond Necklace?

The price for a 48 carat diamond necklace starts at $1 and tops out at $1,650,000 with these necklaces, on average, selling for $5,338.

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 48 Carat Diamond Necklace
  • 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.