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Invisible Set Sapphire and Diamond Necklace
Located in New York, NY
Invisible Set Sapphire & Diamond Necklace Measurements: 14" long Gold Type: 18K & Platinum
Category

Vintage 1950s Chain Necklaces

Materials

Diamond, Sapphire

Invisible Set Sapphire and Diamond Earclips
Located in New York, NY
Earrings in 18K White Gold with Invisible Set Sapphires & Diamonds. Made in Italy, circa 1980s.
Category

Vintage 1980s Italian Clip-on Earrings

Materials

White Diamond, Blue Sapphire, 18k Gold

Invisible Set Sapphire Diamond White Gold Brooch
Located in New York, NY
An 18k white gold brooch, set with vibrant invisible set sapphires and approx. 10ctw in GH/VS
Category

20th Century Brooches

Materials

Diamond, Sapphire, White Gold

Invisible Set Sapphire and Diamond Earrings, 18k
Located in New York, NY
A pair of Invisible Set Sapphire and Diamond Earrings made in 18k with appx. 4.50 carats of
Category

20th Century Lever-Back Earrings

Materials

Diamond, Sapphire, 18k Gold

Medium Invisibly-Set Sapphire Diamond Flower Earrings
Located in Palm Beach, FL
Invisibly-set sapphire and diamond five-petal flower earrings, designed with calibre-cut sapphire
Category

2010s Clip-on Earrings

Materials

Diamond, Sapphire, 18k Gold, White Gold

Trifari Alfred Philippe Invisibly Set Sapphire Flower Brooch
By Alfred Philippe for Trifari
Located in New York, NY
Super rare Trifari 'Alfred Philippe' Gold Pave and Invisibly Set Sapphire Poinsettia Star Flower
Category

Vintage 1960s American Art Deco Brooches

Materials

Gilt Metal

Alexis Invisible Set Sapphire Diamond Gold Feather Brooch
Located in New York, NY
Exquisite 18k gold feather brooch by Alexis, with approx. 38-40cts in blue invisible set sapphires
Category

21st Century and Contemporary Brooches

Materials

Diamond, Sapphire, Gold

Boucheron Paris Retro Invisible Set Sapphire Diamond Gold Brooch
By Boucheron
Located in New York, NY
Retro classic 18k gold brooch by Boucheron Paris, set with invisible set sapphires and approx
Category

Vintage 1950s French Retro Brooches

Materials

Diamond, Sapphire, Gold

Piaget Enamel Invisible Set Sapphire Diamond Gold Cocktail Ring
By Piaget
Located in Holland, PA
18k Yellow Gold Diamond Invisible Set Sapphire Enamel Ring by Piaget. With 8 princess cut diamonds
Category

Vintage 1970s Swiss Cocktail Rings

Materials

Diamond, Blue Sapphire, Sapphire, 18k Gold, Enamel

Exquisite French Invisible Set Sapphire Diamond Gold Rose Flower Brooch
Located in New York, NY
French made exquisite rose flower brooch, in 18k gold, featuring vibrant invisible set sapphires
Category

20th Century French Brooches

Materials

Diamond, Sapphire, Gold

Modernist Invisibly Set Sapphire Diamond and Gold Ring
Located in New York, NY
Modernist Invisibly Set Sapphire and Diamond Ring rendered in 18K Gold. Modern and streamline in
Category

Vintage 1980s American Modernist Dome Rings

Materials

Diamond, Blue Sapphire, Gold, 18k Gold

Invisible set sapphire and diamond ring, French, circa 1940
Located in London, GB
Invisible set sapphire and diamond ring. Set with seventy six tapered baguette cut natural
Category

Vintage 1940s French Dome Rings

Materials

Diamond, Sapphire, Platinum

Horizontally and Vertically Invisibly Set Sapphire and Diamond Ring, 18K Yellow
Located in New York, NY
Horizontally and Vertically Invisibly Set Sapphire and Diamond Ring made in 18K Yellow Gold
Category

20th Century Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold

Oscar Heyman Day and Night Invisible Set Sapphire Earrings
By Oscar Heyman
Located in New York, NY
Oscar Heyman Day and Night Invisible Set Sapphire Earrings A pair of Oscar Heyman day and night
Category

21st Century and Contemporary American Dangle Earrings

Materials

Diamond, Sapphire, Platinum

Oscar Heyman Bros. Invisible Set Sapphire & Diamond Earrings
By Oscar Heyman
Located in New York, NY
Oscar Heyman Bros. Invisible Set Sapphire & Diamond Earrings A striking pair of earrings by Oscar
Category

20th Century American Contemporary Hoop Earrings

Materials

Diamond, Sapphire, 18k Gold

Invisible Set Sapphire and Diamond Button Earrings in 18k Yellow Gold
Located in La Jolla, CA
Invisible Set Sapphire and Diamond Button Earrings in 18k Yellow Gold Sapphire and Diamond
Category

21st Century and Contemporary North American Stud Earrings

Materials

Diamond, Sapphire, Yellow Gold

Invisible Set Sapphire Gold Ring
Located in New York, NY
18k gold ring, with invisible set blue sapphires. Ring size - 6.5, ring top is 8mm wide. Weight
Category

20th Century More Rings

Materials

Sapphire, Gold

Invisibly-Set Sapphire Line Bracelet
Located in Palm Beach, FL
Line bracelet, showcasing four rows of faceted square-shaped natural blue sapphires invisibly-set
Category

2010s Tennis Bracelets

Materials

Sapphire, 18k Gold, White Gold

Vintage invisibly set sapphire and diamond ring, circa 1950.
Located in London, GB
Vintage invisibly set sapphire and diamond ring. Centrally set with a cushion shape old cut natural
Category

Vintage 1950s Unknown Dome Rings

Materials

Diamond, Sapphire, Platinum

Invisibly Set Sapphire and Diamond Fish Brooch in 18 Karat Yellow Gold
Located in Wailea, HI
Invisibly Set Sapphire and Diamond Fish Brooch in 18k Yellow Gold Designed Depicting a Typical Fish
Category

Late 20th Century Brooches

Invisible Set Sapphire Diamond Ring
Located in New York, NY
An impeccable ring in platinum with invisible set blue sapphires and diamonds. Circa 1970s.
Category

Vintage 1970s American Cocktail Rings

Materials

Diamond, Blue Sapphire, Platinum

Invisible Set Sapphire Diamond Gold Ring
Located in New York, NY
18k gold ring, with invisible set blue sapphires and 2.10ctw in diamonds. Ring size - 6.75, ring
Category

20th Century More Rings

Materials

Diamond, Sapphire, Gold

Gold Invisible Set Sapphire Diamond Ring
Located in New York, NY
18K Y/gold sapphire diamond ring, stamps D1.3 S5.74 K18, diamond weighing 1.3 ct, GH VS-SI sapphire
Category

20th Century Unknown More Rings

Materials

Diamond, Sapphire, Gold

Platinum Invisible Set Sapphire Diamond Ring
Located in New York, NY
Platinum sapphire and diamond cross over ring, sapphire weight 4.49 cts diamonds weight 0.50 ct
Category

20th Century Unknown More Rings

Materials

Diamond, Sapphire, Platinum

8.00 Carat Invisible Set Sapphire and Diamond Clip Earrings with Fold Down Post
Located in Chevy Chase, MD
A beautifully made pair of invisible set Sapphire and Diamond earrings in 18K yellow gold. The
Category

Late 20th Century Unknown Retro Clip-on Earrings

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold

Large Antique Edwardian Diamond, Invisibly Set Sapphire 18k Gold Navette Ring
Located in New York, NY
this size, with invisibly set sapphires, high quality diamonds are incredibly striking and quite rare
Category

Early 20th Century Edwardian Engagement Rings

Materials

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

Small Invisibly-Set Sapphire Diamond Clover Earrings
Located in Palm Beach, FL
Four-leaf clover stud earrings, designed as an invisibly-set calibre-cut sapphire clover centering
Category

2010s Stud Earrings

Materials

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

Small Invisibly-Set Sapphire Diamond Flower Earrings
Located in Palm Beach, FL
Flower stud earrings, designed as an invisibly-set calibre-cut sapphire flowerhead centering a
Category

2010s Thai Stud Earrings

Materials

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

18K Yellow Gold Invisible Set Sapphire & Diamond Dangle Drop Day Night Earrings
Located in Montclair, NJ
sapphires and fiery pave diamonds. The optional drops are 3D tear drops covered in calibre cut invisible set
Category

21st Century and Contemporary Dangle Earrings

Materials

Diamond, Sapphire, Yellow Gold

French Invisible Set Sapphire Diamond Platinum Ring
Located in New York, NY
French made, platinum dome ring, featuring invisible set blue sapphires and approx. 0.60ctw in
Category

20th Century French More Rings

Materials

Diamond, Sapphire, Platinum

4.49 Carat Invisible Set Sapphire Diamond Platinum Cocktail Ring
Located in New York, NY
Platinum cocktail ring, featuring 4.49ctw invisible set blue sapphires (few minor chips on multiple
Category

20th Century More Rings

Materials

Diamond, Sapphire, Platinum

Alfieri & St John Invisibly Set Sapphire and Diamond Crossover Ring
Located in New York, NY
carats of invisibly set baguette cut sapphires and .57 carats of round brilliant diamonds. Ring size 6.5
Category

1990s Italian Modern Cocktail Rings

Materials

Diamond, Blue Sapphire, Sapphire, 18k Gold

Picchiotti Invisibly Set Sapphire and Diamond 18 Karat Gold Bracelet
By Picchiotti
Located in New York, NY
Picchiotti 18 Karat yellow gold bracelet is Invisibly set with 34 graduating baguette cut sapphires
Category

1990s Italian Modern Bangles

Materials

Diamond, Blue Sapphire, 18k Gold

Vintage Invisible-Set Sapphire and Pavé Diamond 18K Gold Ring
Located in Houston, TX
carats; H-I color and VS-SI clarity. In addition, there are 54 square-cut invisible-set blue sapphires
Category

Late 20th Century Unknown Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold

Invisible Set Sapphire Diamond Ruby Mother of Pearl Gold Fish Brooch
Located in New York, NY
18k gold fish brooch, featuring invisible set blue sapphires, carved mother of pearl, ruby eye and
Category

20th Century Brooches

Materials

Diamond, Pearl, Ruby, Sapphire, Gold

Oscar Heyman Platinum Invisibly Set Sapphire & Diamond Bombe Ring sz 6.5
By Oscar Heyman
Located in New York City, NY
Oscar Heyman platinum ring contains 54 square sapphires in an invisible (or mystery) setting and 34
Category

2010s American Contemporary Dome Rings

Materials

Sapphire, Platinum

Contemporary 9 carat invisible set sapphire diamond emerald 18k gold earrings
Located in Beverly Hills, CA
blue sapphires, 2.10 carats of sparkling diamonds, and vivid emerald cabochon accents. Center stone
Category

21st Century and Contemporary Contemporary Drop Earrings

Materials

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

Art Deco Platinum & Diamond Chain Pendant/Brooch W/ Invisibly Set Sapphires
Located in New York, NY
This exquisite Art Deco platinum and diamond chain pendant/brooch, crafted in the United States, circa 1925, exemplifies the era's elegance and innovative design. The intricate piece...
Category

Vintage 1920s American Art Deco Drop Necklaces

Materials

Diamond, Sapphire, Platinum

18 Karat Gold, 16.26 Carat Invisibly Set Sapphire and Diamond Bangle Bracelet
Located in New York, NY
This 18 karat yellow gold bangle bracelet is designed with 4 rows of invisibly set , square cut
Category

1990s Retro Bangles

Materials

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

VCA Style Faux Invisibly Set Sapphire Crystal Costume Flower Clip-on Earrings
Located in Miami Beach, FL
set blue crystals that look like sapphires. Just look at the backs and you can see how finely these
Category

20th Century Clip-on Earrings

Materials

Crystal, Sterling Silver

Earrings with invisibly set sapphire drops 12ct total weight and 3.16 tw diamond
Located in Great Neck Plaza, NY
of radiant-cut blue sapphires. The deep blue hue of the sapphires exudes sophistication
Category

21st Century and Contemporary Drop Earrings

Materials

Diamond, Blue Sapphire, White Gold

French Van Cleef & Arpels Three Row Diamond Ring with Channel Set Sapphires
By Van Cleef & Arpels
Located in New York, NY
A Van Cleef & Arpels Three Row Diamond Ring with Invisibly Set Sapphires, made in France. 18 Karat
Category

20th Century French Bridal Rings

Materials

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

Van Cleef and Arpels Mystery Set Sapphire Cufflinks
By Van Cleef & Arpels
Located in New York, NY
Van Cleef and Arpels Invisible Set Sapphire Cufflinks A pair of mystery-set cufflinks by Van
Category

Late 20th Century French Cufflinks

Materials

Sapphire, 18k Gold

Channel Set Sapphire and Diamond Lever Back Earrings, 18K White Gold
Located in New York, NY
A pair of Invisibly Set Sapphire and Diamond Lever Back Earrings made in 18K White Gold. The length
Category

21st Century and Contemporary Lever-Back Earrings

Materials

Diamond, Sapphire, 18k Gold, White Gold

6.65 Carat Blue White Invisible Sapphire Diamond Gold Cocktail Ring
Located in Stamford, CT
Sapphire and diamond white gold cocktail ring. Blue and white invisibly set, sapphires with white
Category

Late 20th Century Cocktail Rings

Materials

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

18k White Gold Sapphire and Diamond Cocktail Band
By Avanti
Located in Carrollton, TX
This stunning band contains invisible set sapphires in the center that is surrounded by pavé set
Category

2010s American Contemporary Band Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

Clustered Blue Sapphire and 18K White Gold Dome Cocktail Ring
By Royaal Stones Ltd
Located in Bangkok, Thailand
A beautifully hand-crafted 16.63 carat Blue Sapphire cocktail ring, set in solid 18K White Gold
Category

21st Century and Contemporary Art Deco Cluster Rings

Materials

Blue Sapphire, 18k Gold, White Gold

Regal 18K White Gold Sapphire and Diamond Flower Brooch
Located in New York, NY
undulating petals comprises of approximately 40ct of square cut, invisible set sapphires and approximately
Category

Vintage 1960s Brooches

Materials

Diamond, Sapphire, 18k Gold, White Gold

Vintage Princess Cut Sapphire and Diamond Gold Ring
Located in New York, NY
sapphires, meticulously invisibly set in a diamond-shaped pattern. The rich sapphires are encased in a
Category

20th Century Unknown Retro Cocktail Rings

Materials

Diamond, Sapphire, Gold, 18k Gold

Marcel Boucher Retro Scroll Clip
By Marcel Boucher
Located in New York, NY
Marcel Boucher Retro Scroll Clip from the 1940's. High style Retro design with invisibly set
Category

Vintage 1940s American Retro Brooches

Materials

Rhodium

Vivid Diamonds Sapphire and Diamond Flower Earrings
By Vivid Diamonds
Located in Miami, FL
1.10 carats total, G color, VS clarity. Heart shape petals, encrusted with invisibly set sapphires
Category

21st Century and Contemporary American Modern Lever-Back Earrings

Materials

Diamond, Sapphire, 18k Gold, White Gold

Boucheron 18k Gold Retro Clip Pin Brooch
By Boucheron
Located in Beverly Hills, CA
features approximately 10 carats of invisibly set sapphire and 2.40 carats of Old European cut diamonds (G
Category

Vintage 1930s French Retro Brooches

Materials

Diamond, Blue Sapphire, Yellow Gold, 18k Gold, Platinum

Invisibly Set Natural Sapphire Ring, 18k
Located in New York, NY
An intricately-made Invisibly Set Natural Sapphire Ring made in 18k white gold. The ring size is US
Category

20th Century Dome Rings

Materials

Sapphire, 18k Gold

Signet Ring - 18k White Gold - 28 Diamonds 0.85 ct - 24 Sapphires 1.77 ct
By Victor Mayer
Located in Pforzheim, DE
invisibly set sapphires total 1.77 ct, limited edition of 50 pieces Reference: V1355/00/3H/00/101 Brand
Category

2010s German Art Deco Cluster Rings

Materials

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

Estate Invisible-Set Blue Sapphire Platinum Ring
Located in Houston, TX
Platinum bombé style ring with 105 invisible-set square blue sapphires that total approximately
Category

Vintage 1980s Unknown Contemporary Dome Rings

Materials

Sapphire, Blue Sapphire, Platinum

Picchiotti Invisibly Set Diamond and Sapphire Baguette Ring
By Picchiotti
Located in New York, NY
, and 1.81 carats of invisibly set baguette cut sapphires. The gems are set halfway around the ring
Category

1990s Italian Cocktail Rings

Materials

Diamond, Blue Sapphire, Sapphire, 18k Gold

Marcel Boucher Sapphire Invisibly Set Suite
By Marcel Boucher
Located in New York, NY
Rare Marcel Boucher Sapphire Paste Invisibly Set Suite from the 1960's. Lovely dimensional design
Category

Vintage 1960s American Art Deco Brooches

Materials

Gilt Metal

Sapphire Diamond Invisible Set White Gold Pendant Necklace
Located in Stamford, CT
Sapphire and diamond pendant necklace. 22 calibre cut sapphires invisible set into a pear style 18k
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

Platinum Diamond and Invisible Set Blue Sapphire Ring
Located in Webster, NY
Vintage approximately 2.62CT Round Brilliant Cut diamond ring with blue sapphires set in a mosaic
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Blue Sapphire, Platinum

Contemporary Sapphire Invisible Set Bombe Ring in White Gold
Located in London, GB
A beautiful contemporary sapphire invisible set ring set in 18k white gold. The ring is composed
Category

2010s Cocktail Rings

Materials

Sapphire, Gold, 18k Gold, White Gold

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Invisible Set Sapphires For Sale on 1stDibs

There is a broad range of invisible set sapphires for sale on 1stDibs. Frequently made of Gold, 18k Gold and Yellow Gold, these items were constructed with great care. Our selection of items includes 94 vintage examples as well as 60 contemporary versions. Our inventory has long been popular, and it includes earlier versions that date to the 20th Century and newer variations that were made as recently as the 21st Century. There are many different pieces in our collection of invisible set sapphires to choose from, but Contemporary and Modern invisible set sapphires are of considerable interest. There have been many well-made iterations of these items over the years, but those made by Cartier, Cellini and Van Cleef & Arpels are often thought to be among the most beautiful. While most can agree that any pick from our collection easily elevates most outfits, but the choice of Sapphire versions from the 116 available is guaranteed to add a special touch to your ensemble. A selection of square cut, round cut and princess cut can be found today on these pages. When shopping our range of invisible set sapphires, you’ll find that there are less available pieces for men today than there are for women.

How Much are Invisible Set Sapphires?

Prices for invisible set sapphires start at $420 and top out at $150,000 with these rings, on average, selling for $6,450.

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.