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Diamond Necklaces

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32,363
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to
5,611
22,735
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2
82
689
5,315
26,576
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336
509
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40
897
494
442
404
338
22,162
10,328
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29,739
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10,125
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Gemstone: Diamond
Returnable Items Only
Antique 0.37 Carat Diamond and 14k Yellow Gold Pendant circa 1910
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive antique 0.37 carat diamond and 14 karat yellow gold, platinum set pendant; part of our antique jewellery collections. This fine and impressive antique diamond ...
Category

1910s Vintage Diamond Necklaces

Materials

Diamond, Yellow Gold

Yellow Gold Diamond Coffin Necklace
Located in SUFFOLK PARK, AU
our unique Yellow Gold Diamond Coffin Pendant, is crafted from solid 9k Yellow Gold and a natural White star set Diamond., and hangs from a dainty 45cm 9k yellow gold cable chain, Th...
Category

2010s Australian Contemporary Diamond Necklaces

Materials

Diamond, 9k Gold, Yellow Gold

18 Karat Rose Gold Emerald and Marquise Cut Diamond Lariat Necklace
Located in Scottsdale, AZ
Designer: custom design Material: 18K rose gold Diamond: 1 emerald cut = 0.41ct Color: G Clarity: SI1 Diamond: 1 marquise cut = 0.42cttw Color: H Clarity: SI1 Dimensions: necklace me...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, Rose Gold

0.95 Carat Round Amethyst & Diamond Yellow Gold Pendant Necklace
Located in Great Neck, NY
This Amethyst & Diamond Pendant is a stunning and timeless accessory that can add a touch of glamour and sophistication to any outfit. This pendant features a 0.95 Carat Round Purp...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Amethyst, Diamond, 14k Gold, Yellow Gold

Victorian Gem-set Dragonfly Platinum and Gold Pendant / Brooch
Located in Beverly Hills, CA
One gem-set dragonfly motif platinum and 18K yellow gold pendant / brooch featuring one bezel set, square cushion cut pink sapphire weighing 2 ct. and two bezel set, round brilliant ...
Category

1910s Vintage Diamond Necklaces

Materials

Diamond, Pink Sapphire, Gold, 18k Gold, Platinum

GIA Certified White Gold Emerald Cut Diamond Pendant 0.92 Carat G/SI1
Located in London, GB
An elegant 18k white gold diamond pendant. The pendant features an emerald cut diamond weighing 0.92ct, G colour and SI1 clarity freely moving below a diamond set bail. The bail is p...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

2.07 Carat Emerald Diamond Pendant
Located in New York, NY
2.07 carats oval Zambian Emerald, framed with 12 round diamonds with pointer 12.0, totaling a diamond weight of 1.44 carats. This stunning Emerald Diamond Pendant...
Category

2010s American Diamond Necklaces

Materials

Diamond, Emerald, 18k Gold

Luxury 14K Diamond Pendant Necklace - Exquisite Statement Piece in White Gold
Located in Holtsville, NY
Experience the enchanting beauty of winter with our Snowflake Soirée Diamond Necklace, a masterpiece from our exquisite collection. Each piece in this collection features sparkling w...
Category

2010s Indian Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

Rose Gold Diamond Coffin Necklace
Located in SUFFOLK PARK, AU
Our unique Rose Gold Diamond Coffin Pendant, is crafted from solid 9k Rose Gold and a natural White star set Diamond, and hangs from a dainty 45cm 9k rose gold cable chain, This exqu...
Category

2010s Australian Contemporary Diamond Necklaces

Materials

Diamond, 9k Gold, Rose Gold

The Kim Pendant with Diamonds in 22k Gold by Tagili
Located in New York, NY
The Kim Pendent is hand made in 22k gold and features a string of diamonds running through it for added glamour. The unique shape stands out on its own and organically set diamonds...
Category

21st Century and Contemporary American Artisan Diamond Necklaces

Materials

Diamond, Gold, 22k Gold

4.50ct Diamond Gold Necklace
Located in New York, NY
This is a gorgeous 18k yellow gold necklace. The necklace is set with sparkling baguette and round cut diamonds that weigh approximately 4.50ct. The color of these diamonds is F-G wi...
Category

20th Century Diamond Necklaces

Materials

Diamond, 18k Gold

14K White Gold Channel Set Princess and Round Cut Diamond Slide Pendant
Located in Scottsdale, AZ
Designer: custom design Material: 14K white gold Diamond: 16 round brilliant cut = 0.16cttw Color: H Clarity: SI1 Diamond: 24 princess cut = 0.72cttw Color: H Clarity: SI1 Dimension...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

1.41 Carat Round Blue Topaz & Diamond White Gold Pendant Necklace
Located in Great Neck, NY
This Blue Topaz & Diamond Pendant is a stunning and timeless accessory that can add a touch of glamour and sophistication to any outfit. This pendant features a 1.41 Carat Round Bl...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, Blue Topaz, 14k Gold, White Gold

Elegante pendente ottocentesco con diamanti "a rosa"
Located in Sežana, SI
Raffinato pendente circolare di produzione ottocentesca, area Impero Austroungarico. Realizzato con struttura in oro e castoni in argento, reca diamanti naturali tagliati "a rosa", p...
Category

Late 19th Century Italian Romantic Antique Diamond Necklaces

Materials

Diamond, 18k Gold, Silver

Diana M . Custom Platinum, Diamond Tennis Necklace Containing 36.56 ct
Located in New York, NY
Custom platinum 16.5" 3 prong diamond tennis necklace containing 36.56 cts of round diamonds 72 stones 0.50 each FG color SI clarity. Excellent cut.
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, Platinum

Roman Malakov 1.27 Carat Emerald Cut Green Emerald and Diamond Pendant Necklace
Located in New York, NY
A charming color rich pendant necklace showcasing an emerald cut green emerald weighing 1.27 carats total, set in a four prong 18K white gold basket, accented by a single asscher cut...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

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

18k Rose Gold Chalcedony Necklace with a White Diamond Halo
Located in Greenville, SC
An 18k rose gold pendant featuring one double prong set cushion cut cabochon blue chalcedony 22.14 carats and accented by a halo of white F color VS clarity diamonds 0.30 total carat...
Category

2010s American Contemporary Diamond Necklaces

Materials

Chalcedony, White Diamond, 14k Gold, 18k Gold, Rose Gold

Diana M. 1.00 Carat Oval Cut Ruby and Diamond Halo Pendant
Located in New York, NY
1.00ct oval ruby surrounded by 0.70 cts round diamonds creating a halo pendant
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, Ruby, 18k Gold, White Gold

Messika 0.38Cttw Sultane Diamond Pendant Necklace 18K White Gold 17 Inches
Located in New York, NY
Embrace the beautiful Messika Sultane diamond pendant chain necklace. Perfect accent for every day and evening looks. It features a center bezel set round brilliant cut diamond with ...
Category

2010s Modern Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Tanzanite Necklace With Diamond Halo 2.84 Carats 14K White Gold
Located in Laguna Niguel, CA
It comes with the Gemological Appraisal by GIA GG/AJP All Gemstones are Natural Trillion Tanzanite = 2.54 Carat 33 Round Diamonds = 0.30 Carats Metal: 14K White Gold Pendant Dimensio...
Category

21st Century and Contemporary Contemporary Diamond Necklaces

Materials

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

Topaz and Diamond Heart Pendant, 5.00 Carat
Located in London, GB
A topaz and diamond heart pendant, central heart shaped orange topaz weighing an estimated 9.00ct, with a three row border of round brilliant cut diamonds and three baguette cut diam...
Category

Early 2000s Modern Diamond Necklaces

Materials

Diamond, Topaz, White Gold

Messika 0.59Ctw Sautoir Kate Diamond Bar pendant Necklace 18K White Gold 29.5 in
Located in New York, NY
This gorgeous Messika Sautoir Kate diamond vertical bar pendant necklace is crafted in highly polished 18K white gold. Featuring pave set round br...
Category

2010s Modern Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Stunning 18 kt. White Gold Necklace with 1.11 ct Natural Diamonds - IGI Cert
Located in רמת גן, IL
This stunning necklace is a must-have for any woman who loves diamonds. The necklace features a dazzling 0.25 carat round brilliant natural diamond in an E-F color, VVS2-VS1 clarity,...
Category

2010s Israeli Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

0.26 Carat Vs G Diamonds on 18 Carat Rose Gold necklace
Located in Milano, MI
This wonderful Leo Milano necklacefrom our Palestro collection shows in every detail a very complicate yet perfectly done workmanship. The necklace is in 18 carat Rose gold .The nec...
Category

21st Century and Contemporary Italian Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, Rose Gold

Edwardian 1.35 Carat Sapphire and Diamond Pendant, C.1910s
Located in London, GB
A strikingly beautiful pendant featuring a single natural, unheated blue sapphire delicately mil grained in the centre. It has a weight of 1.35 carat and is an old cushion cut shape....
Category

1910s Unknown Edwardian Vintage Diamond Necklaces

Materials

Diamond, Sapphire, 18k Gold, Platinum

14K Rubellite & Diamond Drop Pendant Necklace - Exquisite Gemstone Statement
Located in Holtsville, NY
Evoke the fiery passion of nature's blooms with our exquisite Blooms of Passion Ruby Lite and Diamond Necklace. This radiant masterpiece from Jeweltique's Ruby Lite collection is a t...
Category

2010s Indian Diamond Necklaces

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Handcrafted Turtle Back Emerald Pendant in 14kt Gold
Located in Fukuoka City, Fukuoka
Introducing our exquisite Turtle Back Shaped Emerald Pendant, a stunning vintage-style piece meticulously handcrafted in 14kt gold. This pendant captures t...
Category

2010s Diamond Necklaces

Materials

Diamond, Emerald, Gold

Diamond Necklace in 18 Carat White Gold and 10.3 Carats of Diamonds
Located in Paris, FR
18-carat white gold necklace composed of a line of 121 round brilliant-cut diamonds. Weighing approximately 0.1 carat each. Each diamond is set with 3 prongs. Total weight of 121 dia...
Category

Early 2000s French Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

14.69 Carat Diamond Scalloped Tennis Necklace 18 Karat In Stock
Located in Boca Raton, FL
18k White Gold 14.69ctw Baguette & Round Brilliant Cut Diamond Scalloped Tennis Necklace Product: Baguette & Round Brilliant Diamond Necklace Material: 18k White Gold Diamond Detail...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

Single Ant Pendant Necklace Yellow Gold Black Rhodium Diamonds
Located in Los Angeles, CA
This stunning pendant features a unique design inspired by the queen ant, symbolizing strength and leadership. The combination of 14k yellow gold and black ...
Category

2010s North American Diamond Necklaces

Materials

Diamond, Rhodium, Yellow Gold

Natural Yellow Sapphire and Diamond Halo Pendant 14k Yellow Gold
Located in Laguna Niguel, CA
It comes with the appraisal by GIA GG/AJP Sapphire = 1.60 Carat ( 8 x 6 mm ) Cut: Oval Total Quantity of Sapphire: 1 Primary Stone Color: Yellow Diamonds = 0.20 Carats Total Quantity...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, White Diamond, Sapphire, Yellow Sapphire, Gold, 14k Gold, Yello...

Green Diamond Strand with a 14 Karat Yellow Gold Clasp
Located in Greenville, SC
A 16 inch, 17 total carat weight dark green diamond necklace with a 14k yellow gold clasp. This necklace was made and designed by llyn strong.
Category

2010s American Contemporary Diamond Necklaces

Materials

Diamond, Yellow Gold

Maria Kotsoni Contemporary 18k Gold XO Pink Enamel Diamond Pendant Necklace
Located in Nicosia, CY
The XO, pendant necklace is crafted in 18K gold hallmarked in Cyprus. This cool pendant necklace, comes in a highly polished finish and features 0.23 Cts...
Category

2010s Cypriot Contemporary Diamond Necklaces

Materials

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

Antique 1.77 Carat Diamond and 14 Karat White Gold Art Deco Pendant
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive antique 1.77 carat diamond and 14 karat white gold and platinum set Art Deco pendant; part of our diverse antique jewellery and estate jewelry collect...
Category

1930s Unknown Art Deco Vintage Diamond Necklaces

Materials

Diamond, White Gold, Platinum

Rachel Koen Diamond Triangle Necklace 14K Rose Gold 0.03Cttw
Located in New York, NY
Beautiful and delicate this precious diamond necklace will leave everyone speechless the moment they see it. Crafted in high polished solid 14k rose gold this necklace is pave set wi...
Category

2010s American Modern Diamond Necklaces

Materials

Diamond, 14k Gold, Rose Gold

Small Dragonfly Diamond Necklace / Rose Gold
Located in Los Angeles, CA
Elevate your style with our Small Dragonfly Diamond Necklace in Rose Gold. Inspired by the mesmerizing beauty and adaptability of dragonflie...
Category

2010s American Modern Diamond Necklaces

Materials

Diamond, Rose Gold

Memoire Diamond Circle Pavé Necklace 62 Round Brilliant Diamond 1.01ctw 18k Whit
Located in Los Gatos, CA
This Memoire Diamond Circle Pavé Pendant necklace features a total of 62 Round Brilliant Diamonds, amounting to 1.01ctw, set in an 18K White Gold 18" A...
Category

2010s Chinese Modern Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Antique Edwardian Diamond Pendant Necklace Platinum Brooch in 4cts of Diamond
Located in Kendal, GB
This extraordinary antique Edwardian necklace displays a fabulous, open-worked pendant adorned with a dazzling array of old European cut dia...
Category

1910s European Edwardian Vintage Diamond Necklaces

Materials

Diamond, Platinum

Transcendence Necklace 2.5gms 2.95ctw Tourmaline, Quartz, and Diamond
Located in New Orleans, LA
Go beyond yourself. Transcend the constructs of space and time and return to your true nature. This statement necklace features a uniquely included rutilated quartz stone, which enco...
Category

2010s American Diamond Necklaces

Materials

Diamond, Quartz, Tourmaline, Gold, 14k Gold, Yellow Gold

Small Butterfly Diamond Necklace Side View White Gold
Located in Los Angeles, CA
Capture the essence of delicate beauty with our Small Butterfly Diamond Necklace. This enchanting piece is a true treasure, radiating elegance and grace. Crafted in 14k White Gold, i...
Category

2010s American Artist Diamond Necklaces

Materials

Diamond, White Gold

Adamas Cornicello Diamond Onyx Necklace
Located in New York, NY
Everyone could use a little extra good luck, especially when it comes in such a lovely form as a charm necklace. This Adamas Cornicello Diamond Onyx Necklace features 7 cornicelli (singular, cornicello or corno portafortuna), or Italian horns, in various sizes and elegant treatments. The cornicello is an Italian amulet...
Category

21st Century and Contemporary Italian Contemporary Diamond Necklaces

Materials

Diamond, Onyx, 18k Gold

TIFFANY & Co. Platinum 18K Gold Diamond Cruciform Cross Pendant Necklace
Located in Los Angeles, CA
TIFFANY & Co. Platinum 18K Gold Diamond Cruciform Cross Pendant Necklace Metal: Platinum and 18K gold Chain: 16" gold chain Pendant: 7mm wi...
Category

2010s American Diamond Necklaces

Materials

Diamond, 18k Gold, Platinum

23 Carat Round Brilliant Diamond Riviera Necklace Certified
Located in New York, NY
Introducing the Earth Mined Diamond Necklace for Ladies. This beautiful necklace features a stunning round brilliant cut diamond weighing in at 2...
Category

2010s American Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

14 Karat White Gold Amethyst and Diamond Necklace
Located in Scottsdale, AZ
Designer: custom Material: 14K white gold Diamond: 3 round brilliant cut = 0.03cttw Color: H Clarity: SI1 Dimensions: necklace measures 20-inches long Weight: 4.54 grams
Category

21st Century and Contemporary Diamond Necklaces

Materials

Amethyst, Diamond, 14k Gold, White Gold

18k Yellow Gold Crystal Opal Necklace with White Diamond Halo
Located in Greenville, SC
An 18k yellow gold necklace featuring one double prong set free formed Australian crystal opal 3.72 carats and accented by a halo of white diamonds 0.31 total carat weight on a 1.5mm...
Category

2010s American Contemporary Diamond Necklaces

Materials

White Diamond, Opal, Yellow Gold

14 Karat Yellow Gold Diamond “S” Necklace
Located in Scottsdale, AZ
Designer: custom design Material: 14K yellow gold Diamond: round brilliant cut = 0.10cttw Color: G Clarity: SI1 Dimensions: necklace measures 18-inches in length Weight: 3.26 grams
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

Stunning 14K Emerald & Diamond Pendant Necklace Elegant Gemstone Sparkle
Located in Holtsville, NY
Product Description: Immerse yourself in the enchanting allure of our Forest Ferns Emerald and Diamond Earrings, a mesmerizing creation from Jeweltique's prestigious collection. Insp...
Category

2010s Indian Diamond Necklaces

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

Heart Shape Pink Gemstone Necklace Diamond 18 Karat White Gold Handmade Jewelry
Located in IN
Presenting this exquisite heart-shaped pink gemstone necklace, adorned with diamond accents, crafted in 18 karat white gold. This stunning handm...
Category

21st Century and Contemporary Indian Modern Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Sunray Crystal Diamond Pendant In 18k White Gold
Located in New York, NY
Sunray Crystal Diamond PendantIn 18k White Gold Beautiful One of a Kind Art-Deco Style Pendant, with Diamond border and a Baguette Diamond Center Setting on top of a Sunray Crystal ...
Category

20th Century Art Deco Diamond Necklaces

Materials

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

Luxurious 14K 32.23ctw Diamond Pendant Necklace - Exquisite Statement Jewelry
Located in Holtsville, NY
Introducing the Magma Blaze Black Diamond Pendant, a masterpiece from Jeweltique's captivating collection that channels the fierce energy of a volcanic eruption. Meticulously crafted...
Category

2010s Indian Diamond Necklaces

Materials

Black Diamond, 14k Gold, Yellow Gold

1 Carat Diamond Pave Butterfly Necklace
Located in Boca Raton, FL
Material: 18k Yellow gold Diamond Details: 1ctw of Round and Marquise cut Diamonds. Diamonds are G/H in color and VS in clarity Pendant Measurements: 20mm x 20mm x 5mm. Necklace is...
Category

21st Century and Contemporary American Diamond Necklaces

Materials

Diamond, White Diamond, 18k Gold, Yellow Gold

0.92 Carat Pave Diamond Butterfly Necklace 18 Karat
Located in Boca Raton, FL
18k White Gold 0.92ctw Pave Diamond Butterfly Necklace Material: 18k White Gold Diamond Details: Approximately 0.92ctw of Round Brillia...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

0.62 Carat Vs G Diamonds on 18 Carat White Gold Onyx Pendant
Located in Milano, MI
This wonderful Leo Milano pendant from our Brera collection shows in every detail a very complicate yet perfectly done workmanship. The pendant and the chain are in 18 carat white g...
Category

21st Century and Contemporary Italian Contemporary Diamond Necklaces

Materials

Diamond, Onyx, 18k Gold, White Gold

Ravishing 14k White Gold Necklace w/ 8.36 ct Natural Diamonds IGI Certificate
Located in רמת גן, IL
A stunning necklace with dazzling 8.36-carat round brilliant diamonds. The jewelry is made of 14K White Gold with a high-quality polish. It comes with an IGI certificate and a nice j...
Category

2010s Israeli Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

18 Karat White Gold Pave Diamond Oval Disc Necklace
Located in Scottsdale, AZ
Material: 18K white gold Diamond: 234 round brilliant cut = 3.51cttw Color: G / H Clarity: VS2 Dimensions: necklace measures 18-inches in length Weight: 19.00 grams
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Medium Pendant with Chain Crafted in 18K Rose Gold & White Diamonds 0.31 ct.
Located in Paris, IDF
Pendant crafted in 18K Rose Gold ; 82 handset stones: White Diamonds 0.31 ct. 18K Rose Gold 3.5 gr. Total weight with chain 5.69 gr. Hand crafted and made in Italy. Gemstones are...
Category

2010s Italian Contemporary Diamond Necklaces

Materials

Diamond, White Diamond, 18k Gold, Rose Gold

Roberto Coin Small Diamond Dot Necklace 111476AJCHX0
Located in Wilmington, DE
Roberto Coin Siena Small Diamond Dot Necklace in 18k White & Yellow Gold. Diamonds :- 0.08 total carat weight 111476AJCHX0
Category

2010s Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold, Yellow Gold

4 Carat Pave Diamond Rectangular Shape Pendant Necklace 18 Karat In Stock
Located in Boca Raton, FL
18k White Gold 4ctw Pave Diamond Rectangular Shape Pendant Necklace Material: 18k White Gold Diamond Details: There are approximately 4 carats of invisible set diamonds. There are Pr...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

Shop Vintage and Antique Diamond Necklaces on 1stDibs

Whether you're pairing an elegant drop necklace with an evening gown for a fancy dinner or layering a solitaire pendant with your favorite gold or silver chains, you can count on the fact that antique diamond necklaces will elevate any ensemble.

Pendant necklaces worn by royalty and nobles conferred wealth and prestige in ancient times. Wearing jewelry has since become far more widespread, and today, personal adornment is all about expression: Luxury diamond necklaces — Cartier diamond necklaces, Harry Winston diamond necklaces and other iterations — exude confidence and can symbolize the celebratory nature of a deep romantic relationship. (Diamond lockets, for example, which feature a motif that first emerged in the 1800s, are frequently shaped like a heart.) 

Diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands. From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone.

In the late 19th century, "King of Diamonds" Charles Lewis Tiffany — founder of famed luxury house Tiffany & Co. — purchased a 287-carat yellow diamond discovered in the Kimberely Mine in South Africa. The stone was the largest yellow diamond ever mined, and was fashioned by gemologist George Kunz into a cushion-cut brilliant of 128 carats. Kunz gave it a total of 90 facets: 48 on the pavilion, 40 on the crown, plus the table and culet. Breakfast at Tiffany’s fans may recognize the stone from promotional photos for the film — actress Audrey Hepburn wore it as part of the Jean Schlumberger-designed Ribbon Rosette necklace.

But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality. 

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

Grading aside, a beloved diamond necklace is going to deliver the perfect amount of sparkle and joy every time you put it on, whether it's an emerald and diamond necklace, a classic diamond choker or some other similar accessory.  

Find antique and vintage diamond necklaces today on 1stDibs.

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