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Diamond Necklaces

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Item Ships From: USA
Gemstone: Diamond
Rachel Koen 18k Yellow Gold Diamond Hamsa Pendant 0.30cttw
Located in New York, NY
This majestic Hamsa pendant features 0.30cttw brilliant round white diamonds in micro pave setting. At the center evil eye symbol bezel set with a tiny dia...
Category

2010s American Modern Diamond Necklaces

Materials

Diamond, Yellow Gold

Vintage Diamonds and Sapphires 18k White Gold Enhancer
Located in Surfside, FL
Vintage diamonds and sapphires enhancer, with over 4.50 carats marquise, round and pear brilliant cut diamonds set in 18K white gold, GIA certified center brilliant Marquise cut diam...
Category

20th Century Diamond Necklaces

Materials

Diamond, White Gold

White Diamond Pave Pendant Necklace in 14k White Gold
Located in Los Angeles, CA
Gorgeous 1.50 ct. of good quality, white, and bright diamonds in this modern yet classy pendant necklace. Handmade in 14k white gold. Length is 18".
Category

21st Century and Contemporary Diamond Necklaces

Materials

White Diamond, White Gold

Tanzanite Cabochon Pendant 21 Carats Diamonds 18 Karat
Located in North Hollywood, CA
This Tanzanite Cabochon Pendant with a Diamond surround is done in 18K White Gold and is brand new and never been worn. This tanzanite is a...
Category

2010s American Modern Diamond Necklaces

Materials

White Diamond, Tanzanite, 18k Gold

Gurhan 24 Karat Yellow Gold and Silver Diamond Necklace
Located in West Palm Beach, FL
A, beautiful 24K & Silver Diamond necklace by Gurhan, this listing is for the necklace but you can buy this as a suite with the pair of earrings. This is a beautiful necklace with a ...
Category

21st Century and Contemporary Art Nouveau Diamond Necklaces

Materials

Diamond, Yellow Gold, Silver

Roman Malakov, Round Diamond Cross Pendant Necklace
Located in New York, NY
A brilliant pendant necklace showcasing six round diamonds bezel set in an 18 karat white gold cross design. Suspended on a diamond by the yard chain. Diamonds weigh 1.27 carats tota...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

14 Karat White Gold Pear Diamond Halo Necklace
Located in Scottsdale, AZ
Designer: custom Material: 14K white gold Diamonds: 1 pear cut = 1.10cttw Color: I Clarity: SI2 Diamonds: 28 round cut = 0.30cttw Color: H Clarity: SI1 Dimensions: necklace measures...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

Diamond Necklace
Located in New Orleans, LA
Art Deco Diamond Necklace Circa 1920-1930’s.. Platinum, all European cut diamonds (G-H color / VV1 to VS1) Approx. 4 cts in the pendent and approx. 6 cts. in the necklace
Category

1920s Art Deco Vintage Diamond Necklaces

Materials

Diamond

Diamond Necklace
Diamond Necklace
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Chopard Diamond Pave Heart Pendant
Located in Greenwich, CT
Truly beautiful Diamond Pave Heart Pendant by Chopard. Happy Diamonds collection, combining the feminine style with jewelry excellence. This heart...
Category

21st Century and Contemporary Swiss Modern Diamond Necklaces

Materials

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

14 Karat Yellow Gold Diamond E Necklace
Located in Scottsdale, AZ
Designer: custom design Material: 14K yellow gold Diamond: 14 round brilliant cut = 0.11cttw Color: G Clarity: VS2 Dimensions: necklace measures 18-inches in length Weight: 3.09 grams
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

4 Carat Ruby, 3.75 Carat Diamond and Gold Necklace
Located in New York, NY
The front plaque with three curved round diamond channels accented by graduated rectangular rubies, joined to a twin fancy linking back chain gathered by ruby and diamond stations, m...
Category

Early 20th Century Contemporary Diamond Necklaces

Materials

Diamond, Ruby, 18k Gold

Vintage Victorian Style Apx 3.20ct Rose Cut Diamond Drop Necklace Platinum
Located in BEVERLY HILLS, CA
Stunning vintage rose cut diamond drop pendant necklace. Approximately 3.20 carats of oval and round rose cut diamonds. Approximately I/J color and SI clarity. Missing two smaller st...
Category

1960s Unknown Victorian Vintage Diamond Necklaces

Materials

Diamond, Platinum

Picture Pendant Heart with Diamond Bale on White Topaz by the Yard Chain
Located in New York, NY
Personalized Picture Pendant Heart with a Diamond Bale on White Topaz by the Yard Chain with Diamond enhancer, 18kt yellow gold. Make beautiful jewelr...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, Topaz, 18k Gold, Yellow Gold, 14k Gold, Rose Gold, Silver

Oval Shaped Black Onyx and Diamond Pendant Set in 18 Karat White Gold
Located in Sherman Oaks, CA
Women's 18k White Gold Oval Shaped Black Onyx & Diamond Pendant Large oval black onyx is 34 mm wide 44 mm in length Small oval black onyx is 15mm wide 20 mm in length Diamond bail i...
Category

2010s Diamond Necklaces

Materials

Diamond, Onyx, 18k Gold, White Gold

Caboshon Sapphire with Around Diamonds Pendant
Located in New York, NY
The pendant finely crafted in 18k yellow gold with center caboshon sapphire weighing approximately total of 3.00 carat and diamonds around weighing approximately total of 1.30 carat....
Category

1980s American Vintage Diamond Necklaces

Materials

Diamond, Sapphire, 18k Gold

Galt AGL Graded Ceylon No Heat Pear Shape Sapphire Approximately 4 Carats
Located in Bay Harbor Islands, FL
Galt Approximately 4 Carat AGL Graded Ceylon No Heat Pear Shape Sapphire and Diamond Pendant featuring a 4.27 carat pear shaped sapphire with an American Gemological Laboratories (AG...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, Blue Sapphire, Platinum

Roman Malakov 2.01 Carat Total Oval Cut Diamond Fashion Pendant Necklace
Located in New York, NY
A unique and chic fashion necklace showcasing 2.01 carat total made with 6 pieces of oval cut brilliant diamonds, H-I Color, VS-SI in Clarity, single drilled and attached by 18K Whit...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Faye Kim 18 Karat Gold and Diamond French Bulldog Charm Necklace
Located in Westport, CT
For the Frenchie lover, this Faye Kim 18 Karat Gold French Bulldog Charm is full of personality and complete with diamond eyes. The cable chain is...
Category

2010s American Contemporary Diamond Necklaces

Materials

Diamond, Gold, 18k Gold

Nouvelle Bague Rose Necklace with Enamel and Diamond C2871GP
Located in Wilmington, DE
Nouvelle Bague Rose Necklace with Enamel and Diamonds in 18k White Gold Chain Length 16" C2871GP
Category

2010s Diamond Necklaces

Materials

Diamond, Enamel

0.28 Carat Natural Diamond Peace Sign Necklace Pendant 14 Karat White Gold Chain
Located in New York, NY
0.28 Carat Natural Diamond Peace Sign Necklace 14K White Gold 18'' Chain 100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond ...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, White Gold

Roberto Coin Love Letter L Pendent with Diamonds 001634AWCHXL
Located in Wilmington, DE
18kt White Gold Diamonds 0.03 total carat weight L 18″ Chain 001634AWCHXL
Category

2010s Diamond Necklaces

Materials

Diamond

1.00 Carat Natural Diamond Cross Pendant 14 Karat White Gold G SI Chain
Located in New York, NY
1.00 Carat Natural Diamond Cross Necklace 14K White Gold G SI 18 inches chain 100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond Necklace 1.01CT G-H SI 14K White Gold ...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

1.33 Carat 14 Karat Gold Pave Set Multi Heart Diamond Necklace
Located in Los Angeles, CA
14K Gold Beautiful Multi Heart (6 hearts) P with total weight of 1.33 Ct Pave Set Diamond necklace with 16" double chain. Total Diamond Weig...
Category

2010s American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold

1.00 Carat Natural Diamond Bezel Necklace 14 Karat White Gold
Located in New York, NY
1.00 Carat Diamond Bezel Necklace G SI 14K White Gold 18 inches 100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond Necklace 1.00CT G-H SI 14K White Gold, Bezel style, ...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

Badgley Mischka Lapis Lazuli Diamond Blue Iolite 18 Karat White Gold Necklace
Located in Sherman Oaks, CA
Gorgeous, Unique 18k White Gold Necklace Showcasing a Large Blue Lapis with Diamonds and Iolite Features 18k White Gold Rolo Chain w/ Diamonds Micr...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, Iolite, Lapis Lazuli, White Gold, 18k Gold

Platinum Diamond Coral Bead Necklace
Located in New York, NY
Platinum clasp, adorned with approx. 1.20ctw in diamonds, featuring 3 strands of coral beads. Necklace is 27" long, coral beads range from 8mm x 7mm to 12mm x 11.5mm. Weight - 203.3...
Category

20th Century Diamond Necklaces

Materials

Coral, Diamond, Platinum

Handcrafted 14 Karat Yellow Gold Cross Pendant
Located in Great Neck, NY
14 Karat Yellow Gold Hand-Crafted Matte-Finish Cross Pendant, Imprinted with the Word "Jerusalem" on the Front and Enhanced with 0.05 Carats of a Pave Set Diamond Bale Sliding on a 1...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

14 Karat White Gold Diamond Cluster Flower Necklace
Located in Scottsdale, AZ
Designer: custom design Material: 14K white gold Diamonds: 9 round brilliant cut = .48cttw Color: G Clarity: SI1 Dimensions: necklace measures 18-inches in length Weight: 2.47 grams
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

Diamond Beaded Necklace 34.15 Tcw 18k Gold Certified
Located in Brooklyn, NY
Natural Finely Faceted Quality Diamond Beaded Necklace 34.15 TCW 18k Gold 16 Inches Certified $7,950 920472 This is a Unique Custom Made Glamorous Piece of Jewelry! Nothing says, “...
Category

2010s American Modern Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

18 Karat Yellow Gold Diamond Tennis Necklace
Located in Scottsdale, AZ
Designer: custom design Material: 18K yellow gold Diamond: 134 round brilliant cut = 13.01cttw Color: G / H Clarity: VS2 Dimensions: necklace measures 17-inches in length Weight: 2...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

6.43 Carat Green Tourmaline and Diamond Pendant Halo Necklace in 18 karat Gold
Located in Miami, FL
6.43 Carat Green Tourmaline and Diamond Pendant Necklace in 18 karat Gold This is a handmade, one of a kind creation by H&H Jewels. It features a 6.43 carat of tourmaline surroun...
Category

2010s Diamond Necklaces

Materials

Diamond, Tourmaline, Gold, 18k Gold, White Gold

3.50 Carat Natural Sapphire and Diamond Necklace Pendant 14 Karat White Gold
Located in New York, NY
3.52 Carat Natural Diamond and Sapphire Necklace 14K White Gold 100% Natural Diamonds and Sapphire 3.52CT G-H SI 14K White Gold Prong style 5.30 gram 3...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, Sapphire, 14k Gold, White Gold

14 Karat Yellow Gold Diamond Channel Set Diamond Heart Pendant
Located in Scottsdale, AZ
Designer: custom Material: 14K yellow gold Diamonds: 20 round brilliant cut = 1.00cttw Color: I Clarity: SI1-2 Dimensions: pendant measures 26.75 X 20.50mm Weight: 2.96 grams
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

7.50 Carat Diamond Station Tennis Necklace 14 Karat In Stock
Located in Boca Raton, FL
Material: 14k white gold Diamond Details: Approx. 7.50ctw of round cut Diamonds. Diamonds are G/H in color and VS in clarity Clasps: Tongue in box Total Weight: 14.7g (9.4dwt) Length...
Category

21st Century and Contemporary American Diamond Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

18 Karat White Baguette and Emerald Diamond Necklace 5.25 Carat
Located in Great Neck, NY
18K white gold diamond necklace set with baguette and round diamonds that create the illusion of a single emerald cut. The total carat weight of the necklace is 5.25 carats. The clar...
Category

21st Century and Contemporary Thai Modern Diamond Necklaces

Materials

Diamond, Emerald, 18k Gold

Vintage Estate 14 Karat White Gold Diamond Pendant
Located in Great Neck, NY
Beautifully designed diamond drop pendant with dazzling square-cut diamonds. Metal: 14K White Gold Weight: 4.4 Grams Diamond Weight: Approximately 1.75 ct Diamond Color: H Dia...
Category

Early 2000s Modern Diamond Necklaces

Materials

Diamond, 14k Gold

5.28 Yellow Sapphire with Diamond Tree Inspired Pendant Necklace 18k White Gold
Located in BEVERLY HILLS, CA
Beautiful tree motif yellow sapphire and diamond necklace pendant. 4.80 carats of round yellow sapphire. 0.48ct of round brillian...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

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

1.31 Ct 18 Karat Gold Invisible Set Heart Necklace
Located in Los Angeles, CA
18K Gold Beautiful Heart Necklace with 14 Natural Round Diamonds with total weight of 1.31 Ct Invisible Set (No Prong, No metal to obstruct the view of diamonds) Diamond necklace. To...
Category

2010s American Neoclassical Diamond Necklaces

Materials

Diamond, 18k Gold

Marina B Yellow Gold Pendant Necklace with Blue Topaz and Diamond, 1980s
Located in Beverly Hills, CA
Chic articulated necklace created by Marina B in 1980s. Elegant and wearable, the necklace is a great addition to your jewelry collection. The necklace is made of 18 karat yellow go...
Category

1980s Italian Vintage Diamond Necklaces

Materials

Diamond, Topaz, 18k Gold, Yellow Gold, Base Metal

White and Fancy Yellow Diamond Choker Necklace Set in 18 Karat White Gold
Located in Los Gatos, CA
This Beautiful Geometric Design is so flexible. This exquisite 16" choker necklace set features a luxurious combination of white and fancy yellow d...
Category

20th Century Italian Art Deco Diamond Necklaces

Materials

White Diamond, Yellow Diamond, 18k Gold

14 Karat White Gold Graduated Diamond Tennis Necklace
Located in Scottsdale, AZ
Designer: custom design Material: 14K white gold Diamond: 107 round brilliant cut = 10.39cttw Color: G / H Clarity: SI1 Dimensions: necklace measures 15-inches in length Weight: 41....
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

3.40 Carats Total Round Blue Sapphire & Diamond Reversible Pendant Necklace
Located in New York, NY
A unique circle pendant necklace showcasing round brilliant diamonds weighing 1.60 carats total on one side, and reverses to round blue sapphires weighing 1.80 carats total on the ot...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

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

Roman Malakov, 0.79 Carat Round Diamond Bezel Solitaire Pendant Necklace
Located in New York, NY
A simple and versatile solitaire pendant necklace showcasing a single round diamond in a 14 karat white gold bezel. Attached to a 16 inch white gold chain. Style available in diffe...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

Sapphire and Diamond Tassel Necklace
Located in New York, NY
Magnificent Sapphire and Diamond Tassel Necklace Approximately 77 carats of oval cut sapphires & 28 carats of round cut diamonds all set in pl...
Category

2010s American Diamond Necklaces

Materials

Diamond, Sapphire, Platinum

Diamond Tourmaline Garnet Pendant Necklace 9.13 TCW GIA Certified
Located in Brooklyn, NY
Diamond Tourmaline Garnet Pendant Necklace 17" 9.13 TCW GIA Certified $9,795 213257 This is a Unique Custom Made Glamorous Piece of Jewelry! Nothing says, “I Love you” more than Di...
Category

2010s American Diamond Necklaces

Materials

Diamond, Garnet, Tourmaline, 14k Gold

Elegant Diamond and Gold pendant
Located in New York, NY
An intricately designed pendant with 0.25Ct of diamonds set in white gold.
Category

2010s Diamond Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

GIA Sphalerite and White Diamond Pendant in 18k Yellow Gold
Located in Los Angeles, CA
Gorgeous GIA certified 89.38 ct. sphalerite pear shape with 1.50 ct. white diamond rounds. Handmade in 18k yellow gold. Unique and rare piece. GIA certificate included.
Category

21st Century and Contemporary Diamond Necklaces

Materials

White Diamond, Yellow Gold

Natural Sapphire Diamond Necklace 14k Gold 1.51 TCW Certified
Located in Brooklyn, NY
Natural Sapphire Diamond Necklace 18" 14k Gold 1.51 TCW Certified $4,950 215426 MADE IN ITALY Nothing says, “I Love you” more than Diamonds and Pearls! This Sapphire necklace has ...
Category

2010s American Diamond Necklaces

Materials

Diamond, Sapphire, 14k Gold

Irene Neuwirth Labradorite Diamond Rose Gold Pendant Necklace
Located in Stamford, CT
Irene Neuwirth 18k rose gold necklace. 5 cabochon color change marquise Labradorites, each with a halo of round diamonds. 1 round cabochon labradorite. 18.5 inches long. 5 cabochon...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, Labradorite, Gold, 18k Gold, Rose Gold

1.0 Carat Diamond Cluster Diamond Station Necklace 18 Karat in Stock
Located in Boca Raton, FL
18k White Gold 1.0ctw Diamond Cluster Diamond Station Necklace Material: 18k White Gold Diamond Details: Approximately 1.0ctw of Round Cut Diamonds Diamond Stations: There are 8 bez...
Category

21st Century and Contemporary American Diamond Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

Handcrafted 14 Karat Yellow Gold Hammered Leaf Pendant, Accented with Diamonds
Located in Great Neck, NY
14 Karat Yellow Gold Hand-Crafted Matte and Hammer-Finished Leaf Pendant, Enhanced with 0.27 Carats of Pave Set Diamonds, Sliding on a 16" Rolo Chain.
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

Diana M Jewels 15.00 Carat Pink Sapphire and Diamond Riviera Necklace
Located in New York, NY
18k Rose Gold, Diamond & Pink Sapphire Necklace, Oval design nautural unheated roze cut sapphires Tab insert with safety clasp Necklace length: 26" This product comes with a certifi...
Category

21st Century and Contemporary American Diamond Necklaces

Materials

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

1990's South Sea Pearl 27.30cts Diamond Platinum Dangle Necklace
Located in Miami, FL
Be the center of attention with this stunning South Sea Pearl Diamond Platinum Dangle Choker Necklace weighing approximately 88.2 grams. Expertly crafted in solid luxurious Platinum...
Category

1990s Contemporary Diamond Necklaces

Materials

Diamond, South Sea Pearl, Platinum

6.83 Carats Total Pear & Round Shape Diamond Halo Diamonds by the Yard Necklace
Located in New York, NY
A unique diamond by the yard necklace showcasing a pear shape diamonds, set in a row of round brilliant diamonds in a halo design. Each diamond halo is spaced evenly with more round ...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Moonlight Cluster Necklace: 1.1 Carat Diamonds in 18k Yellow Gold
Located in New York, NY
Carat Weight: A total of 1.1 carats of dazzling diamonds grace this necklace, promising to mesmerize. Diamonds: Meticulously arranged, the necklace features 45 exquisite diamonds, e...
Category

21st Century and Contemporary Hong Kong Modern Diamond Necklaces

Materials

Diamond, Yellow Gold, 18k Gold

Diamond Freshwater Pearl Necklace Baroque 14k Gold Italy Certified
Located in Brooklyn, NY
Fine Quality Baroque Freshwater Pearl Diamond Necklace 14k Gold Italy Certified $3950 914368 This is a Unique Custom Made Glamorous Piece of Jewelry! MADE IN ITALY Nothing says, “...
Category

2010s Italian Modern Diamond Necklaces

Materials

Diamond, Pearl, Freshwater Pearl, 14k Gold, White Gold

20 Carat Antique Edwardian Style Rivera Diamond Gold Necklace
Located in New York, NY
Introducing our Antique Diamond Double Line Necklace, a timeless and elegant piece that transports you to a bygone era of opulence and glamour. This exquisite necklace boasts a stunn...
Category

21st Century and Contemporary American Edwardian Diamond Necklaces

Materials

Diamond, Gold

Roman Malakov, 1.75 Total Carat Three Stone Heart Shape Diamond Pendant Necklace
Located in New York, NY
A simple but elegant diamond pendant necklace showcasing a row of three heart shape fancy intense yellow diamonds that elegantly drop on a platinum chain. Accented by 54 bright round...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, Platinum

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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