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Diamond Necklaces

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Item Ships From: USA
Gemstone: Diamond
Roman Malakov, 0.31 Carat Brilliant Round Cut Diamond Solitaire Pendant Necklace
Located in New York, NY
This simple and timeless pendant necklace showcases one brilliant round cut diamond. Diamond weighs 0.31 carats and mounted in a beautiful three prong setting. Made in 14 karat and 1...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

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

18 Karat White Gold Ruby and Diamond Slide Pendant
Located in Scottsdale, AZ
Designer: custom Material: 18K white gold Diamond: 16 round cut = .33cttw Color: G Clarity: VS2 Dimensions: pendant measures 15.76 X 10.5mm Weight: 3.8 grams
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, Ruby, 18k Gold, White Gold

18 Karat White Gold Diamond Butterfly Necklace
Located in Great Neck, NY
127 pieces of round diamonds weighing 1.98 carats 18K white gold Weighing 7.75 grams Butterfly Dimensions (27Wx21H) mm GH VS2-SI1
Category

2010s American Modern Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

14K Yellow Gold Tiger Eye Multi-Strand Bead Diamond Necklace
Located in New York, NY
The 14K Yellow Gold Tiger Eye Multi-Strand Bead Diamond Necklace is a truly exquisite piece of jewelry. The necklace features six strands of beautifully crafted tiger eye beads, each...
Category

20th Century Unknown Modern Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

Diamond Station Necklace, Yellow-White Gold, Two Strand Layered Necklace
Located in Austin, TX
Show off your elegance with the beauty of this necklace. This piece looks stunning on any neck with two strands of 14 karat yellow gold with eye clean, round brilliant diamonds attac...
Category

2010s American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold, Yellow Gold

Tiffany & Co Platinum Diamond Jade Coral Long Necklace
Located in New York, NY
Platinum Tiffany & Co diamond clasp long necklace, with 6-9.5mm jade beads and 4-9.5mm corals. Weight - 156.3 grams. Diamond is approx. 0.74ct. Necklace is 75" long.
Category

20th Century American Diamond Necklaces

Materials

Coral, Diamond, Jade, Platinum

Amethyst Pear and White Diamond Necklace in 14k Yellow Gold
Located in Los Angeles, CA
Gorgeous 15.00 ct. amethyst pear shape with 3.10 ct. good quality white diamond rounds and baguettes. Handmade in 14k yellow gold with an Omega style chain.
Category

21st Century and Contemporary Diamond Necklaces

Materials

Amethyst, White Diamond, Yellow Gold

Piaget Diamond Peridot Heart White Gold Pendant Necklace
Located in Holland, PA
18k White Gold Diamond And Peridot Heart Pendant Necklace by Piaget. With round brilliant cut diamonds VS1 clarity, G color total weight approxi...
Category

21st Century and Contemporary Swiss Diamond Necklaces

Materials

Diamond, Peridot, 18k Gold

1.35 Carat Natural Sapphire 0.08 Carat Diamond 14 Karat Gold Flower Necklace
Located in Los Angeles, CA
Type: Necklace Wearable Length: 16" Pendant:12.6 mm Metal: White Gold Metal Purity: 14K Stone Type:1.35 CT Blue Sapphire and 0.08 CT G VS2 Diamonds Hallmarks: 14K Total Weight: 4.5 G...
Category

Early 2000s Unknown Diamond Necklaces

Materials

Diamond, Blue Sapphire

14 Karat White Gold Single Diamond Necklace
Located in Scottsdale, AZ
Designer: The Estate Watch & Jewelry Material: 14k white gold Diamond: 1 round brilliant cut = 0.10ct Dimensions: necklace measures 16-inches in length We...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

1 Carat Round Diamond Small Cross Pendant Necklace Platinum in Stock
Located in Boca Raton, FL
Platinum: 1ctw Round Diamond Small Cross Pendant Necklace Material: 18k White Gold Diamond Details: Approx. 1ctw of round cut Diamonds. Diamonds ar...
Category

21st Century and Contemporary Unknown Diamond Necklaces

Materials

Diamond, White Diamond, Platinum

Rachel Koen Diamond Octagon Pendant Necklace 14K Yellow Gold 0.17Cttw
Located in New York, NY
Beautiful and delicate this diamond pendant necklace will leave everyone speechless the moment they see it. Crafted in high polished 14k yellow gold. Octagon shape cut out pendant wh...
Category

2010s American Modern Diamond Necklaces

Materials

Diamond, Yellow Gold, 14k Gold

18 Karat White Gold Heart / Religious Pendant with Diamond Accents
Located in Stamford, CT
18 Karat White Gold Heart / Religious Pendant with Diamond Accents 0.06 TDW. 2.41 grams total weight.
Category

2010s Contemporary Diamond Necklaces

Materials

Diamond

Roberto Coin Love Letter J Pendent with Diamonds 001634AWCHXJ
Located in Wilmington, DE
18kt White Gold Diamonds 0.06 total carat weight J 18″ Chain 001634AWCHXJ
Category

2010s Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

0.50Cttw Round Cut Diamond Heart Pendant Cuban Chain Necklace 14K Yellow Gold
Located in New York, NY
This beautiful diamond heart pendant necklace is a must have for your jewelry collection. Crafted in fine 14k yellow and white gold. It features 0.50 carat of prong set dazzling round brilliant cut diamonds encrusted in a heart shape shank giving an illusion of a bigger stone...
Category

2010s Modern Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

2.45Ct Natural Emerald and Diamond 14K Solid Yellow Gold Necklace
Located in Los Angeles, CA
2.45Ct Natural Emerald and Diamond 14K Solid Yellow Gold Necklace Amazing looking piece! Stamped: 14K Suggested Replacement Value: $4,50...
Category

2010s American Diamond Necklaces

Materials

Diamond, Emerald, Yellow Gold, 14k Gold

Round Diamond in 18 Karat White Gold with Toggle Clasp Leaf Necklace
Located in Miami, FL
Brilliance Jewels, Miami Questions? Call Us Anytime! 786,482,8100 Style: Diamond Leaf Necklace Metal Type: White Gold Metal Purity: 18k Stones: 45 Round Brilliant Cut Diamonds Diam...
Category

21st Century and Contemporary Diamond Necklaces

Materials

Diamond, White Gold, 18k Gold

0.66 Carat Round Brilliant Cut Diamond Station Necklace 14 Karat in Stock
Located in Boca Raton, FL
This 14 Karat Diamond Station Necklace is the perfect addition for your jewelry collection! This necklace can be worn with other item...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, Gold, 14k Gold, Yellow Gold

White Diamond Cluster Flower Pendant in 14k White Gold
Located in Los Angeles, CA
Beautiful 1.00 ct. white diamond flower cluster pendant handmade in 14k white gold. Length is 18". Easy to wear stacked with other necklaces or on it's own.
Category

21st Century and Contemporary Diamond Necklaces

Materials

White Diamond, White Gold

GIA Certified 1.50 Carat Emerald Cut Diamond Solitaire Pendant Necklace
Located in New York, NY
A simple and versatile pendant necklace featuring a solitaire GIA Certified 1.50 carat emerald cut diamond, H Color and SI in Clarity. Set horizontally, in an everlasting 18K white ...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Elizabeth Rand 18K Yellow Gold Diamond Necklace
By Elizabeth Rand
Located in Los Angeles, CA
100% Authentic, 100% Customer Satisfaction Width: 1.8 mm Pendant: 28 mm Size: 16 Inches Metal: 18K Yellow Gold Hallmarks: E Rand 750 Total Weight: 14.3 ...
Category

21st Century and Contemporary American Diamond Necklaces

Materials

Diamond, 18k Gold

Capucelli '5.50 ct. t.w.' Natural Diamonds Tennis Necklace, 14k Gold 4-Prongs
Located in Great Neck, NY
Handmade in New York of polished 14k white gold, CAPUCELLI's Tennis necklace showcases a delicate box chain embellished with dozens of shimmering white diamonds. Beautiful Diamond T...
Category

21st Century and Contemporary Art Nouveau Diamond Necklaces

Materials

Diamond, 14k Gold

Capucelli '7.50 ct. t.w.' Natural Diamonds Tennis Necklace, 14k Gold 3-Prongs
Located in Great Neck, NY
Description Beautiful Diamond Tennis Necklace. A staple in your jewelry collection. Handmade in New York City. This tennis necklace showcases a delicate 3 Prongs chain embellished wi...
Category

21st Century and Contemporary Art Nouveau Diamond Necklaces

Materials

Diamond, 14k Gold

14K White Gold Diamond Tennis Necklace, Features 3.13Cts of Round Diamonds
Located in New York, NY
"14K White Gold Diamond Tennis Necklace, Features 3.13Cts of Round Diamonds. FG color and SI calrity and Excellent cut 17" inche...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, White Gold

GIA Certified 18k Carved White Jade, Jade and Diamond Pendant and Chain Necklace
Located in New York, NY
18 & 14 kt., one carved white jade ap. 44.88 x 22.55 x 7.85 mm., one cabochon jade, round & marquise-shaped diamonds ap. .40 ct. With GIA report no. 5182480861, no indications of i...
Category

Early 20th Century Contemporary Diamond Necklaces

Materials

Diamond, Jade, White Gold

Roman Malakov, 0.23 Carat Total Round Diamond Illusion Pendant Necklace
Located in New York, NY
Showcasing a cluster of 15 brilliant round diamonds illusion-set in a round mounting. The illusion setting makes it look like one large diamond. Diamonds weigh 0.23 carats total, G c...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 18k Gold, White Gold

Capucelli '4.24 ct. t.w.' Natural Diamonds Tennis Necklace, 14k Gold 4-Prongs
Located in Great Neck, NY
Handmade in New York of polished 14k white gold, CAPUCELLI's Tennis necklace showcases a delicate box chain embellished with dozens of shimmering white diamonds. Beautiful Diamond T...
Category

21st Century and Contemporary Art Nouveau Diamond Necklaces

Materials

Diamond, 14k Gold

0.73 Carats Oval Cut Blue Sapphire and Diamond Halo Pendant Necklace
Located in New York, NY
A simple and timeless piece of jewelry showcasing a 0.73 carat oval cut blue sapphire, surrounding by a single row of brilliant round diamonds weighing 0.23 carats total, G color and...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

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

Rachel Koen Green Colombian Emerald Diamond Cross Pendant Necklace Platinum
Located in New York, NY
This gorgeous necklace features timeless beauty and superlative craftsmanship with a striking stylized cross beautifully crafted in platinum and placed on a diamond by the yard chain. A romantic jewel for your neck with glorious green and white precious high-quality genuine gems. Diamonds are G-H color and VS1-VS2 clarity. Cherry-picked oval cut green Colombian emerald...
Category

2010s American Modern Diamond Necklaces

Materials

Emerald, Diamond, Platinum

AJD Magnificent Rubelite and Diamond Collar in Rich 18 Karat Yellow Gold
Located in Raleigh, NC
Beautiful Brazilian Handmade 18K Yellow Gold Collar with Trillion Red Brazilian Rubelite (13x13mm) surrounded, est 7.5 ct, with pave diamond est 0.65ctw H/I color, SI clarity, work....
Category

1980s Brazilian Artisan Vintage Diamond Necklaces

Materials

Diamond, Rubelite, Tourmaline, 18k Gold, Gold, Yellow Gold

Topaz and Diamond Drop Necklace
Located in New York, NY
Topaz & Diamond Drop Necklace 18K White Gold Topaz Weight: 147.50 Cts Diamond Weight: .45 Cts Length: 15.5 Inches
Category

1980s American Vintage Diamond Necklaces

Materials

Diamond, Topaz, 18k Gold

Roman Malakov 0.51 Carats Trillion Cut Diamond Solitaire Pendant Necklace
Located in New York, NY
A fashionable yet simple pendant necklace showcasing a single 0.51 carat trillion diamond, set in a 14K White Gold mounting. Suspended on a 16 inches white gold chain. Perfect for yo...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

Diamond Lavalier Necklace by Tiffany6 & Co, 45.64 Carats
Located in New Orleans, LA
Six diamond-encrusted fans are suspended from a pearl and diamond bead chain in this elegant lavalier necklace from Tiffany & Co. Round diamonds tot...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

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

14 Karat White Gold Sapphire and Diamond Pendant Necklace
Located in Stamford, CT
14 Karat White Gold 15 Inch Sapphire and Diamond Pendant Necklace 0.25 total diamond weight 2.04 grams total weight.
Category

2010s Modern Diamond Necklaces

Materials

Diamond, Blue Sapphire, 14k Gold

Roman Malakov GIA Certified 0.92 Carat Pear Shape Diamond Bezel Pendant Necklace
Located in New York, NY
A simple pendant necklace showcasing a GIA Certified 0.92 carat pear shape diamond, L Color and SI2 in Clarity. Bezel set in 14K Yellow Gold, suspended on a 14K White Gold Chain. 16 ...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold

GIA Certifed 0.91 Carat Orange Heart Shape Diamond Pendant Necklace
Located in New York, NY
This very rare color diamond is graded by the GIA to be untreated fancy deep brownish yellow orange. The remarkable diamond is set in a 18k gold handmade Italian setting. The incredible craftsmanship not often found on pendants this size has the pendant finely suspended from a fine delicate chain, thus ensuring it to sit perfectly This magnificent pendant is the epitome of minimalist perfection. chic, fashion ,perfection. Natural orange color diamonds referred by many as pumpkin colored diamonds are from the rarest diamonds...
Category

2010s American Modern Diamond Necklaces

Materials

Diamond

Citrine, Diamond and Hematite Bead and 14k Yellow Gold Necklace, circa 1970s
Located in Beverly Hills, CA
One citrine, diamond and hematite bead and 14K yellow gold necklace featuring 5 strands of hematite beads centering one triangular mixed cut citrine weighing 30 ct. flanked by two ro...
Category

20th Century Diamond Necklaces

Materials

Citrine, Diamond, Hematite, 14k Gold, Yellow Gold

Tiffany & Co. Paloma Picasso Diamond Heart Yellow Gold Pendant Necklace
Located in Holland, PA
18k Yellow Gold Diamond Heart Pendant Necklace by Paloma Picasso for Tiffany & Co. With 8 Round brilliant cut diamonds VS1 clarity, G color total weight approx. .15ct Details: Length...
Category

1980s American Vintage Diamond Necklaces

Materials

Diamond, Yellow Gold

14 Karat Gold, Cultured Pearl, Mabé Pearl, Onyx and Diamond Necklace
Located in Palm Beach, FL
14 Karat Gold, Cultured Pearl, Mabé Pearl, Onyx and Diamond Necklace The single-strand composed of cultured pearls measuring approximately 4.2 to 10 mm., completed by a gold clasp ...
Category

20th Century Diamond Necklaces

Materials

Diamond, Onyx, Cultured Pearl, Gold

Capucelli '3.50 ct. t.w.' Natural Diamonds Tennis Necklace, 14k Gold 4-Prongs
Located in Great Neck, NY
Handmade in New York of polished 14k white gold, CAPUCELLI's Tennis necklace showcases a delicate box chain embellished with dozens of shimmering white diamonds. Beautiful Diamond T...
Category

21st Century and Contemporary Art Nouveau Diamond Necklaces

Materials

Diamond, 14k Gold

14K White Gold Diamond Straight Line Tennis Necklace 11.75cts
Located in New York, NY
14K White Gold Diamond Straight Line Tennis Necklace Features 11.75Cts of Diamonds. Diana M. is a leading supplier of top-quality fine jewelry fo...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, White Gold

Diamond Opera Tennis Necklace
Located in New York, NY
Important Diamond tennis opera necklace. Over 275 Perfectly matched stones make up this one of a kind master piece. The super white D E F colored VS2 clarity round brilliant cut dia...
Category

2010s American Diamond Necklaces

Materials

Diamond, 18k Gold

Mid-Century Large Cultured Pearl 3.50 CTW Diamond Strand Necklace
Located in Philadelphia, PA
Strand necklace is comprised of Cultured pearls - hand-knotted Graduating in size from 12.5 mm to 17.0 mm - well matched in white body color Exhibiting subtle to moderate rosè over...
Category

1950s Retro Vintage Diamond Necklaces

Materials

White Diamond, Diamond, Cultured Pearl, Gold, White Gold, 14k Gold, Plat...

Art Deco Style 1.97ct Diamond Drop Necklace 18k White Gold
Located in BEVERLY HILLS, CA
Art Deco inspired diamond drop necklace. 1.97 carats of pear and round diamonds, approximately H/I color and SI clarity. 18-karat white gold. Accommodated with an up to date appraisa...
Category

21st Century and Contemporary Unknown Art Deco Diamond Necklaces

Materials

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

Diamond by the Yard Necklace
Located in Great Neck, NY
Italian made Diamond by the yard necklace set in 14K white gold. The total weight is 0.84 carats. Color and Clarity of the stones are G, S...
Category

2010s Italian Modern Diamond Necklaces

Materials

Diamond, 14k Gold

Yellow Gold Butterfly Necklace with Pave Diamonds
Located in New York, NY
An Elegant Butterfly accented with brilliant diamonds!!! 18kt Yellow Gold Butterfly Necklace with White Pave Diamonds weighing approximately ...
Category

21st Century and Contemporary American Diamond Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

14K White Gold 15.68cts Diamond Link Chain Necklace
Located in New York, NY
Contemporary diamond link chain necklace suitable for everyday wear as well as a special night out. It is fun and exciting to throw a diamond chain on over a white T-shirt or a white...
Category

21st Century and Contemporary American Modern Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

30 inch White and Red Coral Necklace
Located in New York, NY
A 30 inch White and Red Coral Necklace with round coral beads that range in size from 3.5 mm - 8mm each. Accented with white irregular shape coral and...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Coral, White Diamond, Yellow Gold

0.61 Carat Natural Diamond Octopus Necklace 14 Karat White Gold G SI Chain
Located in New York, NY
100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond Necklace 0.61CT G-H SI 14K White Gold 4 gram, Pave style, 3.80 gram 13/16 inch in height, 9/16 inch in width 6...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, White Gold

32.20ct Diamond & 18k White Gold Necklace
Located in BEVERLY HILLS, CA
Stunning diamond and white gold over lay necklace. 32.20 carats of round brilliant diamonds, approximately G/H color and SI clarity. 18-karat white gold. Accommodated with an up to d...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

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

GIA Certified 1.11 Carat Natural, Fancy Brown-Yellow, Even VS1 Pear Cut Diamond
Located in Surfside, FL
GIA certified 1.11 carat pear cut diamond: Natural, Fancy Brown-Yellow even color, VS1 clarity, set in white gold pendant, on a 15" chain.
Category

20th Century Diamond Necklaces

Materials

Diamond, Yellow Gold

18 Karat Tahitian Pearl Diamond Pendant 0.83 Carats 15 MM
Located in New York, NY
18 Karat white gold pendant featuring one grey Tahitian Pearl measuring 15 mm with a diamond cap of 86 round brilliants weighing 0.83 carats. Diamond Bale 8.4 MM Long Diamond Cap w...
Category

2010s Contemporary Diamond Necklaces

Materials

Diamond, Pearl, White Gold

3.00 Carat Natural Diamond Tennis Necklace G SI 14k Rose Gold
Located in New York, NY
3.00 Carat Diamond Necklace G SI 14K Rose Gold 16 inches 100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond Necklace 3.00CT G-H SI 14K Rose Gold, Prong style 16 i...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, 14k Gold, Rose Gold

Round Brilliant Diamond & Gold Disk Pendant 14k Gold Engravable Necklace
Located in Austin, TX
Gorgeous Diamond Disk Necklace! 14 Karat Yellow Gold disk necklaces are huge in fine jewelry fashion! You can find them in every magazine. This diam...
Category

21st Century and Contemporary South African Modern Diamond Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

22k Gold Reversible Kashi Pearl and Diamond Necklace, by Tagili
Located in New York, NY
22k gold reversible Kashi Pearl and Diamond Pendent is set in an organic bezel with Tagili Designs Signature finish. The diamonds set in the pearl elevates your style to the next lev...
Category

2010s American Artisan Diamond Necklaces

Materials

Pearl, Diamond, 22k Gold

6.70 Carat Natural Red Ruby and Natural Diamond 14K Solid Yellow Gold Necklace
Located in Los Angeles, CA
6.70Ct Natural Red Ruby and Natural Diamond 14K Solid Yellow Gold Necklace Amazing looking piece! Stamped: 14K Oval-Cut Ruby Weight is Approx. 6.00 Carats Ruby Measures: 12 x 10m...
Category

2010s American Diamond Necklaces

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

20 Karat Diamond Accent Chain Necklace
Located in Secaucus, NJ
Chain necklace set in 20K yellow gold with 0.52cts diamond stations and paisley clasp detail, length measures 24 inches.
Category

21st Century and Contemporary Diamond Necklaces

Materials

White Diamond, Yellow Gold

Roman Malakov 9.70 Carat Total, Oval Cut Green Emerald and Diamond Necklace
Located in New York, NY
Fashionable necklace set with 7 natural green emeralds weighing 5.66 carats. Each emerald is spaced with 2 rows of round brilliant diamonds, Baguette diamonds channel set in a circul...
Category

21st Century and Contemporary American Contemporary Diamond Necklaces

Materials

Diamond, Emerald, 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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