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30+ Carat White Diamond Necklace and Earrings 18K Set Certified Round-Brilliant
By Gad & Co.
Located in Miami, FL
3.5mm Elevate your elegance with this exquisite 30+ Carat Diamond Necklace/Earrings Set, featuring a
Category

21st Century and Contemporary Contemporary Drop Necklaces

Materials

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

30 Carat Diamond Riviera Three Claws 18 Karat White Gold Tennis Line Necklace
By Hasbani Diamonds
Located in London, GB
Exquisite 30.00 Carat Riviera Diamond Necklace. A masterpiece of timeless elegance, this
Category

21st Century and Contemporary British Contemporary Chain Necklaces

Materials

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

30 Carat Round Diamond Platinum Riviera Necklace
Located in Chicago, IL
naturally white luster, this necklace beautifully enhances the radiance of the diamonds. The diamonds
Category

2010s American Contemporary Choker Necklaces

Materials

Diamond, Platinum

30 Carat Emerald Cut Diamond Riviera Necklace
By Antinori Fine Jewels
Located in Chicago, IL
. With a total diamond weight of 30.04 carats, this necklace is a true statement of luxury and refinement
Category

2010s Italian Modern Chain Necklaces

Materials

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

30 Carat Diamond 18K Gold Cluster Necklace
Located in Los Angeles, CA
This exquisite 30 Carat Diamond 18K Gold Cluster Necklace, meticulously crafted in 18k gold
Category

2010s American Modern Pendant Necklaces

Materials

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

30 Carat Diamond Wave Motif Necklace
Located in New York, NY
set with over 30 carats of ideal cut round brilliant diamonds. These high quality diamonds are all
Category

2010s Unknown Choker Necklaces

Materials

Diamond, 18k Gold

30 Carat Round Diamond Link Drop Necklace
Located in New York, NY
designed pendant elegantly drops from the necklace and is set with more brilliant diamonds. The drop
Category

21st Century and Contemporary American Contemporary Drop Necklaces

Materials

Diamond, 18k Gold, White Gold

.30 Carat Diamond White Gold Diamond by the Yard Necklace
Located in Stamford, CT
Diamond by the yard necklace with six diamond rondels. .30 carat round brilliant cut diamonds in
Category

21st Century and Contemporary Chain Necklaces

Materials

Diamond, Gold, 14k Gold, White Gold

.30 Carat Diamond Filigree White Gold Pendant Necklace
Located in Stamford, CT
14k white gold 4 section filigree diamond dangle pendant. Set in 14k white gold with 4 round
Category

Early 20th Century Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold, Gold

30 Carat Natural Untreated Diamond Tennis Necklace 18 Carat White Gold
By Antinori Fine Jewels
Located in Chicago, IL
set in a 18 carat white gold riviera or tennis style necklace. The insertion clasp has a double push
Category

2010s Italian Modern Chain Necklaces

Materials

Diamond, White Gold, 14k Gold

.30 Carat Diamond by the Yard White Gold Necklace
Located in Stamford, CT
Diamond by the yard necklace with six diamond rondelles with a total of .30 carats of diamonds in
Category

21st Century and Contemporary Chain Necklaces

Materials

Diamond, Gold, 14k Gold, White Gold

30 Carat Diamond Cluster Necklace, 18K White Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: White Gold Length: 18
Category

2010s American Choker Necklaces

Materials

Diamond, White Gold

30 Carat Diamond Cluster Necklace, 18K Yellow Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Yellow Gold Length
Category

2010s American Choker Necklaces

Materials

Diamond, Yellow Gold

30 Carat Diamond Cluster Necklace, 18K White Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: White Gold Length: 17
Category

2010s American Choker Necklaces

Materials

Diamond, White Gold

30 Carat Diamond Cluster Necklace, 18K White Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: White Gold Length
Category

2010s American Choker Necklaces

Materials

Diamond, White Gold

30 Carat Diamond Cluster Necklace, 18K Yellow Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Yellow Gold Length
Category

2010s American Choker Necklaces

Materials

Diamond, Yellow Gold

30 Carat Diamond Cluster Necklace, 18K Yellow Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Yellow Gold Length
Category

2010s American Choker Necklaces

Materials

Diamond, Yellow Gold

30 Carat Diamond Cluster Necklace, 18K Yellow Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Yellow Gold Length
Category

2010s American Choker Necklaces

Materials

Diamond, Yellow Gold

30 Carat Diamond Cluster Necklace, 18K White Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: White Gold Length
Category

2010s American Choker Necklaces

Materials

Diamond, White Gold

30 Carat Diamond Cluster Necklace, 18K Rose Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Rose Gold Length: 16
Category

2010s American Choker Necklaces

Materials

Diamond, 18k Gold, Rose Gold

30 Carat Diamond Cluster Necklace, 18K Rose Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Rose Gold Length: 17
Category

2010s American Choker Necklaces

Materials

Diamond, 18k Gold, Rose Gold

30 Carat Diamond Cluster Necklace, 18K Rose Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Rose Gold Length: 18
Category

2010s American Choker Necklaces

Materials

Diamond, 18k Gold, Rose Gold

30 Carat Diamond Cluster Necklace, 18K Rose Gold
Located in Los Angeles, CA
Diamonds not Lab Grown) Diamond Carat: 30 Diamond Clarity: VS Diamond Color: F Color: Rose Gold Length: 15
Category

2010s American Choker Necklaces

Materials

Diamond, 18k Gold, Rose Gold

GIA Certified 30 Carat Diamond Graduated Riviera Necklace
By Issac Nussbaum
Located in New York, NY
perfectly cut ideal round brilliant diamonds. Center stone is a 2 carat stunner which graduates down to 1 1
Category

2010s American Drop Necklaces

Materials

Diamond, 18k Gold

Platinum 30 Carat Emerald Cut Diamond Necklace with GIA Certified Stones
Located in Chicago, IL
This striking platinum necklace features an impressive total of approximately 30 carats of emerald
Category

2010s American Contemporary Chain Necklaces

Materials

Diamond, Platinum

30 Carat Oval Brazilian Emerald & 3 Carat Diamond Tennis Necklace 14 Karat Gold
Located in New York, NY
Presenting the exquisite 30 Carat Oval Brazilian Emerald & 3 Carat Diamond Tennis Necklace in 14
Category

2010s Link Necklaces

Materials

Diamond, Emerald, 14k Gold

Seidengang .30 Carat Diamond Ruby Yellow Gold Pin Pendant Necklace
By SeidenGang
Located in Stamford, CT
Vintage Byzantine style Seidengang heavy textured 18k gold necklace and pin and pendant necklace
Category

Late 20th Century Pendant Necklaces

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold

Diamond 3-Row Necklace in 18 Carat White Gold and 30 Carat Diamonds
Located in Paris, FR
Diamond 3-row Necklace in 18 Carat white Gold and falling Diamonds crimping 30 Carats of Diamonds
Category

Early 2000s French Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

30 Carat Oval Shape Natural Emerald & 23 Carat Diamond Necklace in 18 Karat Gold
Located in New York, NY
30 Carat Oval Shape Natural Emerald & 23 Carat Diamond Necklace in 18 Karat Gold This spectacular
Category

2010s Drop Necklaces

Materials

Diamond, Emerald, 18k Gold

14K White Gold .30 Carat Sapphire & Diamond Dolphin Pendant Necklace
Located in Eagan, MN
This is a very different type of dolphin pendant. It's very unique in that it has .30 carats of
Category

2010s Unknown Art Deco Pendant Necklaces

Materials

Diamond, Sapphire, 14k Gold, White Gold

Natural Yellow Round and White Diamond .30 Carat TW Gold Drop Necklace
Located in New York, NY
RareGemWorld's beautiful diamond necklace. Mounted in a beautiful 18K Yellow and White Gold setting
Category

21st Century and Contemporary Contemporary Drop Necklaces

Materials

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

3.00 Carat Diamond Necklace G SI 14 Karat White Gold 30 Stones
By David Morris
Located in New York, NY
3.00 Carat Diamond by the Yard Necklace G SI 14K White Gold 18 inches 100% Natural Diamonds
Category

21st Century and Contemporary American Contemporary Chain Necklaces

Materials

Diamond, 14k Gold, White Gold

GIA Certified 30 Carat E-F Color VS Clarity Diamond 18k GoldTennis Necklace
By Antinori Fine Jewels
Located in Chicago, IL
Behold an extraordinary piece of magnificence with this GIA certified 30-carat diamond tennis
Category

2010s Italian Contemporary Chain Necklaces

Materials

Diamond, 18k Gold, White Gold

Peter Suchy GIA Certified .30 Carat Emerald Diamond Yellow Gold Pendant
By Peter Suchy
Located in Stamford, CT
Oval bright green emerald and diamond pendant. 18k yellow gold pendant with one center emerald and
Category

21st Century and Contemporary Necklace Enhancers

Materials

Diamond, Emerald, Gold, 18k Gold, Yellow Gold

30 Carats Rubies 18K Gold 0.44 White Diamonds Handcrafted Beaded Necklace
By Rossella Ugolini
Located in Rome, IT
Silhouette Collection 30 Carats Rubies 18K Gold 0.44 White Diamonds Handcrafted Beaded Necklace.
Category

2010s Italian Art Deco Chain Necklaces

Materials

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

6.00 Carat Diamond by the Yard Necklace 14 Karat White Gold 30 Stations
Located in New York, NY
6.00 Carat Diamond by the Yard Necklace G SI 14K White Gold 20 pointers 60 inches 30 stations 100
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Diamond, 14k Gold, White Gold

Tiffany & Co. Soleste Round .30 Carats Diamonds Halo Platinum Pendant Necklace
By Tiffany & Co.
Located in Scottsdale, AZ
own. Metal: Platinum Natural Diamonds: .30 carats Diamond cut: Round Brilliant Diamond color: G-H
Category

21st Century and Contemporary Unknown Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Diamond Curved V Bar Necklace .30 Carats in 14 Karat Yellow Gold Stationary
By Five Star Jewelry
Located in Austin, TX
Weight: .30 Carats Diamond Clarity: VS2 (Excellent, Eye Clean) Diamond Color: G (Excellent, Near
Category

2010s American Modern Choker Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

.30 Carat Islam Crescent Star Necklace 18 Karat
Located in New York, NY
Islam Crescent Star .30ct. Natural diamonds necklace. Rounds Full cut and Brilliant Center: Fancy
Category

2010s American Pendant Necklaces

Materials

Diamond, Brown Diamond, 18k Gold, Yellow Gold

30 Carat Oval Cut Ruby & Mixed Cut Diamond Tennis Necklace in Platinum
By Gad & Co.
Located in Miami, FL
Natural Ruby and Diamond tennis necklace, set in platinum 900. Featuring 18.68 carats in oval-cut
Category

2010s North American Art Deco Chain Necklaces

Materials

Diamond, Ruby, Platinum

2.90 Carat Diamond by the Yard Necklace G SI 14 Karat White Gold 30 Stations
Located in New York, NY
2.90 Carat Diamond by the Yard Necklace G SI 14K White Gold 10 pointers 60 inches 30 stations 100
Category

21st Century and Contemporary American Contemporary Chain Necklaces

Materials

Diamond, 14k Gold, White Gold

.30 Carat White Gold bezel Set Diamond Heart Pendant
Located in Laguna Hills, CA
is .30 carats and the quality is SI clarity and G-H color. The heart measures 3/4 inches in diameter
Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

Nigaam 0.75 Cttw. Natural Diamond Cross and Charms Necklace in 18K Gold, 30"
Located in New York, NY
. With a total diamond weight of 0.75 carats, this necklace serves as a radiant reminder of your faith
Category

2010s Contemporary Drop Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

30 Carat Oval Ethiopian Black Opal Pendant/Necklace 18 Karat + 18 Kt Gold Chain
Located in New York, NY
Approximately 30 Carat Oval Ethiopian Black Opal Pendant/Necklace 18 Karat + 18 Kt Gold Chain This
Category

2010s Pendant Necklaces

Materials

Diamond, Black Opal, 18k Gold, Yellow Gold

30-Carat Pear Cut Aquamarine Diamond Platinum Pendant 14KWG Chain & Baile
Located in Boca Raton, FL
This stunning pendant features an approximately 30-carat pear-cut aquamarine set in platinum
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Aquamarine, Diamond, Gold, 14k Gold, White Gold, Platinum

Retro Gold Warrior Head Natural Pearl, .30 Carat Diamond & Sapphire Pendant 1950
Located in Los Angeles, CA
marquise shaped diamond weighing approximately 0.30 carats. Total weight is 29.1 grams, condition is pre
Category

Vintage 1950s Unknown Retro Pendant Necklaces

Materials

Diamond, Natural Pearl, Sapphire, Gold, 14k Gold

GIA .30 Carat Round Brilliant Cut Diamond Cross Pendant in 18K White Gold
Located in Wan Chai District, HK
Introducing the Round Brilliant Cut Diamond Cross Pendant in 18K White Gold, a stunning piece that
Category

21st Century and Contemporary Hong Kong Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

125 Ct Emeralds & Rubies , 30 Ct Diamond Tutti Fruity Bracelet 18KW Gold, 7.5"
Located in New York, NY
With 30 Ct Diamond Bracelet 18KW Gold 48 Cabochon Natural Rubies 34 Cabochon Natural Emeralds This
Category

Vintage 1980s Choker Necklaces

Materials

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

Faye Kim 18 Karat Gold Round Brilliant Cut Diamond Solitaire Necklace
By Faye Kim
Located in Darien, CT
for every day. Diamond .30 Carat Total necklace length 16" Signature Collection: non negotiable
Category

2010s American Contemporary Choker Necklaces

Materials

Diamond, Gold, 18k Gold

Chanel Comete Pave Diamond Star and 18K White Gold Pendant Necklace
By Chanel
Located in Chevy Chase, MD
Color. Total Diamond Weight: .30 Carats. The necklace is 16.00 inches in length. The Back of the Star
Category

21st Century and Contemporary French Modern Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

GIA Certified .30 Carat Sapphire Diamond Pearl Butterfly Pendant Necklace
Located in Stamford, CT
Diamond, pearl and sapphire butterfly pendant necklace. GIA certified natural no heat blue sapphire
Category

Antique Mid-19th Century Pendant Necklaces

Materials

Blue Sapphire, Sapphire, Pearl, Diamond, Gold, Yellow Gold, White Gold, ...

Platinum and 30 Carat Diamonds French Necklace
Located in Saint-Ouen, FR
Platinum and 30 Carats Diamonds French Necklace Wonderful necklace, made in France circa 1960
Category

Vintage 1960s French Link Necklaces

Materials

Diamond, Platinum

30 Carat Diamonds-by-the-Yard Necklace
Located in San Francisco, CA
Drape your neck in spectacular sparkle with this dazzling diamonds-by-the-yard necklace. Twenty
Category

21st Century and Contemporary Unknown Modern Chain Necklaces

Materials

Diamond, Platinum

High Jewelry Diamond Necklace 24.71 Carat 34, 30 Gr. 18K White Gold
Located in New York, NY
Understated elegance and radiant grace; This eternity diamond necklace is a timeless piece of high
Category

2010s Unknown Art Deco Beaded Necklaces

Materials

Diamond, White Diamond, 18k Gold, White Gold

Pear-Shaped Diamonds High Jewelry Necklace 24.71 Carat 34, 30 Gr. 18K White Gold
Located in New York, NY
Understated elegance and radiant grace; This eternity diamond necklace is a timeless piece of high
Category

2010s Unknown Art Deco Beaded Necklaces

Materials

Diamond, White Diamond, 18k Gold, White Gold

High Jewelry Necklace 24.71 Carat Pear-Shaped Diamonds 34, 30 Gr. 18K White Gold
Located in New York, NY
Understated elegance and radiant grace; This eternity diamond necklace is a timeless piece of high
Category

2010s Unknown Art Deco Beaded Necklaces

Materials

Diamond, White Diamond, 18k Gold, White Gold

.30 Carat Old Mine Cut Diamond Necklace
Located in Miami, FL
Beautiful vintage necklace featuring an old miner cut diamond weighing approximately .30cts, G
Category

Early 20th Century Unknown Victorian Pendant Necklaces

Materials

Diamond, 10k Gold, Rose Gold, Yellow Gold

30 Carat Diamond Platinum Link Necklace Bracelet Set
Located in Napoli, NA
-owned - Excellent METAL: Platinum STONE: Diamonds 30 total carats DESIGN ERA: Circa 1950 WEIGHT: 71.68
Category

Vintage 1950s Link Necklaces

Materials

Diamond, Platinum

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30 Carat Diamond Necklace For Sale on 1stDibs

On 1stDibs, you can find the most appropriate 30 carat diamond necklace for your needs in our varied inventory. Frequently made of Gold, 18k Gold and White Gold, this item was constructed with great care. Find an antique version now, or shop for 89 vintage or 224 modern creation for a more contemporary example of these cherished accessories. Making the right choice when shopping for a 30 carat diamond necklace may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 18th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. Finding an appealing 30 carat diamond necklace — no matter the origin — is easy, but LB Exclusive, Luigi Ferrara and Tiffany & Co. each produced a popular version that is worth a look. A round cut version of this piece has appeal, but there are also oval cut and pear cut versions for sale. When shopping for a 30 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 30 Carat Diamond Necklace?

The price for a 30 carat diamond necklace starts at $298 and tops out at $377,000 with these necklaces, on average, selling for $4,273.

Why Gold Shines in Jewelry Craftsmanship

Gold is the feel-good metal, the serotonin of jewelry. Wear vintage and antique gold necklaces, watches, gold bracelets or gold rings and you feel happy, you feel dressed, you feel, well, yourself. 

Gold, especially yellow gold, with its rich patina and ancient pedigree going back thousands of years, is the steady standby, the well-mannered metal of choice. Any discussion of this lustrous metal comes down to a basic truth: Gold is elementary, my dear. Gold jewelry that couples the mystique of the metal with superb design and craftsmanship achieves the status of an enduring classic. Many luxury houses have given us some of our most treasured and lasting examples of gold jewelry over the years.

Since its founding, in 1837, Tiffany & Co. has built its reputation on its company jewelry as well as its coterie of boutique designers, which has included Jean Schlumberger, Donald Claflin, Angela Cummings and Elsa Peretti. There are numerous gold Tiffany classics worth citing. Some are accented with gemstones, but all stand out for their design and the workmanship displayed.

For the woman who prefers a minimalist look, the Tiffany & Co. twist bangle (thin, slightly ovoid) is stylishly simple. For Cummings devotees, signature pieces feature hard stone inlay, such as her pairs of gold ear clips inlaid with black jade (a play on the classic Chanel black and tan), or bangles whose design recalls ocean waves, with undulating lines of lapis lazuli and mother-of-pearl. And just about any design by the great Jean Schlumberger is by definition a classic.

Even had he eschewed stones and diamonds, Southern-born David Webb would be hailed for the vast arsenal of heavy gold jewelry he designed. Gold, usually hammered or textured in some manner, defines great David Webb jewelry. The self-taught jeweler made very au courant pieces while drawing inspiration from ancient and out-of-the-way sources — East meets West in the commanding gold necklaces made by Webb in the early 1970s. The same could be said for his endlessly varied gold cuffs.

In Europe, many houses have given us gold jewelry that sets the highest standard for excellence, pieces that were highly sought after when they were made and continue to be so. 

Numerous designs from Cartier are homages to gold. There are the classic Trinity rings, necklaces and bracelets — trifectas of yellow, white and rose gold. As a testament to the power of love, consider the endurance of the Cartier Love bracelet.

Aldo Cipullo, Cartier’s top in-house designer from the late 1960s into the early ’70s, made history in 1969 with the Love bracelet. Cipullo frequently said that the Love bracelet was born of a sleepless night contemplating a love affair gone wrong and his realization that “the only remnants he possessed of the romance were memories.” He distilled the urge to keep a loved one close into a slim 18-karat gold bangle. 

BVLGARI and its coin jewelry, gemme nummarie, hit the jackpot when the line launched in the 1960s. The line has been perennially popular. BVLGARI coin jewelry features ancient Greek and Roman coins embedded in striking gold mounts, usually hung on thick link necklaces of varying lengths. In the 1970s, BVLGARI introduced the Tubogas line, most often made in yellow gold. The Tubogas watches are classics, and then there is the Serpenti, the house's outstanding snake-themed watches and bracelets.

A collection called Monete that incorporated the gold coins is one of several iconic BVLGARI lines that debuted in the 1970s and ’80s, catering to a new generation of empowered women. Just as designers like Halston and Yves Saint Laurent were popularizing fuss-free ready-to-wear fashion for women on the go, BVLGARI offered jewels to be lived in

Since Van Cleef & Arpels opened its Place Vendôme doors in 1906, collection after collection of jewelry classics have enchanted the public. As predominantly expressed in a honeycomb of gold, there is the Ludo watch and accessories, circa the 1920s, and the golden Zip necklace, 1951, whose ingenious transformation of the traditional zipper was originally proposed by the Duchess of Windsor. Van Cleef's Alhambra, with its Moroccan motif, was introduced in 1968 and from the start its popularity pivoted on royalty and celebrity status. It remains one of VCA’s most popular and collected styles.

Mention must be made of Buccellati, whose name is synonymous with gold so finely spun that it suggests tapestry. The house’s many gold bracelets, typically embellished with a few or many diamonds, signified taste and distinction and are always in favor on the secondary market. Other important mid-20th-century houses known for their gold-themed jewelry include Hermès and Ilias Lalaounis.

Find a stunning collection of vintage and antique gold jewelry on 1stDibs.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And 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. 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. Not all diamonds are created equal (there are diamonds, and then there are diamonds). 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).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.  

Questions About 30 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.