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Art Deco Calibre Sapphire

Art Deco Round Diamond & Calibre Sapphire Ring
Art Deco Round Diamond & Calibre Sapphire Ring

Art Deco Round Diamond & Calibre Sapphire Ring

Located in New York, NY

Art Deco Diamond Sapphire Ring, circa 1920s Round-cut center stone of 1.35 carats with color J-K, clarity SI1-SI2; remaining diamonds weigh 0.50 carat; calibre-cut sapphires of 1 ca...

Category

Vintage 1920s Art Deco Fashion Rings

Materials

Diamond, Sapphire, White Gold

Art Deco Calibre Set Sapphire Flower Clip
Art Deco Calibre Set Sapphire Flower Clip

Art Deco Calibre Set Sapphire Flower Clip

By Ralph De Rosa

Located in New York, NY

Unusual Art Deco Calibre Set Sapphire Clip of highest quality attributed to De Rosa.

Category

Vintage 1930s American Art Deco Brooches

Materials

Rhodium

Unusual Art Deco Yellow Sapphire with Calibre Amythests
Unusual Art Deco Yellow Sapphire with Calibre Amythests

Unusual Art Deco Yellow Sapphire with Calibre Amythests

Located in New York, NY

Unusual Elegant French Art Deco Ring with Calibre Cut Amythests and Cushion Cut Yellow Sapphire Ring circa 1930 France.

Category

Vintage 1930s French Art Deco More Rings

Materials

Amethyst, Yellow Sapphire, 18k Gold

Art Deco Platinum Calibre-Cut Sapphire and Diamond Bracelet
Art Deco Platinum Calibre-Cut Sapphire and Diamond Bracelet

Art Deco Platinum Calibre-Cut Sapphire and Diamond Bracelet

Located in Braintree, GB

Dimensions Length: 18.5cm Width: 1cm Weight: 24 grams Specifications Metal: Platinum Type: Line bracelet Period: Art Deco, circa 1920s to 1930s Fastening: Concealed clasp with safet...

Category

Vintage 1920s Art Deco Link Bracelets

Materials

Platinum

Art-Deco Style Double Diamond and Calibre Sapphire Ring
Art-Deco Style Double Diamond and Calibre Sapphire Ring

Art-Deco Style Double Diamond and Calibre Sapphire Ring

Located in OVIEDO, AS

Art-Deco Style Double Diamond and Calibre Sapphire Ring.

Category

Late 20th Century European Art Deco Engagement Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

Art Deco Platinum Calibré-Cut Sapphire and Diamond Bar Pin
Art Deco Platinum Calibré-Cut Sapphire and Diamond Bar Pin

Art Deco Platinum Calibré-Cut Sapphire and Diamond Bar Pin

Located in Houston, TX

Art Deco bar pin composed of platinum with sapphires and diamonds.

Category

Early 20th Century Unknown Art Deco Brooches

Materials

Diamond, Sapphire, Platinum

Platinum Art Deco Brooch 2.50ct Diamonds Calibre-Cut Sapphires, circa 1925
Platinum Art Deco Brooch 2.50ct Diamonds Calibre-Cut Sapphires, circa 1925

Platinum Art Deco Brooch 2.50ct Diamonds Calibre-Cut Sapphires, circa 1925

Located in Great Neck, NY

Framing the center stone is a symmetrical arrangement of calibre-cut royal blue sapphires, seamlessly channel-set in true Deco style.

Category

Vintage 1920s European Art Deco Brooches

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, White Gold, Platinum

Calibre Cut Deco Clips
Calibre Cut Deco Clips

Calibre Cut Deco Clips

Located in New York, NY

Attractive Art Deco clips with calibre cut faux sapphires and pastes.

Category

Vintage 1930s American More Jewelry

MARCUS & CO. 1920 Art-Deco Cufflinks In 18Kt Gold With Calibre Cut Gemstones
MARCUS & CO. 1920 Art-Deco Cufflinks In 18Kt Gold With Calibre Cut Gemstones

MARCUS & CO. 1920 Art-Deco Cufflinks In 18Kt Gold With Calibre Cut Gemstones

Located in Miami, FL

An art-deco cufflinks attributed to Marcus & Co.

Category

Vintage 1920s American Art Deco Cufflinks

Materials

Diamond, White Diamond, Emerald, Ruby, Sapphire, Blue Sapphire, Gold, Ye...

Antique 1925 Art Deco Sapphire and Old Cut Diamond Bracelet Platinum
Antique 1925 Art Deco Sapphire and Old Cut Diamond Bracelet Platinum

Antique 1925 Art Deco Sapphire and Old Cut Diamond Bracelet Platinum

Located in South Pasadena, CA

An Art Deco bracelet with calibre cut sapphires, an old cut marquise and Old European cut diamonds.

Category

Vintage 1920s Art Deco Link Bracelets

Materials

Diamond, Sapphire, Platinum

.54 Carat Sapphire Diamond Platinum Art Deco Calibre Ring
.54 Carat Sapphire Diamond Platinum Art Deco Calibre Ring

.54 Carat Sapphire Diamond Platinum Art Deco Calibre Ring

Located in Stamford, CT

Late Art Deco 1940's sapphire and diamond ring. 2 square shaped sapphires set sideways in a platinum engraved setting with 2 round accent diamonds. 2 calibre cut square Sapphires, a...

Category

Early 20th Century Fashion Rings

Materials

Blue Sapphire, Diamond, Sapphire, Platinum

Recent Sales

Art Deco Sapphire and Diamond Platinum Set Ring, circa 1920
Art Deco Sapphire and Diamond Platinum Set Ring, circa 1920

Art Deco Sapphire and Diamond Platinum Set Ring, circa 1920

Located in London, GB

Art Deco calibre sapphire and marquees and round diamond platinum 1920c ring superb wearable ring

Category

Vintage 1920s British Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire

Calibre Sapphire Diamond Art Deco Ring
Calibre Sapphire Diamond Art Deco Ring

Calibre Sapphire Diamond Art Deco Ring

Located in San Francisco, CA

A glorious and gleaming European-cut diamond, accompanied by a GIA Diamond Grading Report stating: K color - VS1 clarity, beams with mega-watt sparkle from this original, and highly ...

Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Art Deco Diamond Calibre Cut Sapphire and Platinum Ring
Art Deco Diamond Calibre Cut Sapphire and Platinum Ring

Art Deco Diamond Calibre Cut Sapphire and Platinum Ring

Located in Melbourne, Victoria

This elegant Art Deco Diamond and Calibre Cut Sapphire ring is set in the centre with three transition cut diamonds of 1 x 0.09 ct and 2 x 0.43 cts.

Category

Vintage 1920s Unknown Art Deco Cluster Rings

Materials

Diamond, Sapphire, Platinum

Wide Art Deco Platinum Diamond and Calibre Sapphire Bracelet
Wide Art Deco Platinum Diamond and Calibre Sapphire Bracelet

Wide Art Deco Platinum Diamond and Calibre Sapphire Bracelet

Located in San Francisco, CA

The scintillating stones are enveloped in swirling diamond-set ribbons outlined with approximately 425 tiny royal blue calibre synthetic sapphires* bordered on each side with slender...

Category

Early 20th Century Art Deco Modern Bracelets

Materials

Diamond, Sapphire, Platinum

Art Deco Diamond and Calibre Sapphire Natural Marquese Platinum Ring, circa 1920
Art Deco Diamond and Calibre Sapphire Natural Marquese Platinum Ring, circa 1920

Art Deco Diamond and Calibre Sapphire Natural Marquese Platinum Ring, circa 1920

Located in London, GB

Fabulous Art Deco natural calibre sapphire and diamond Marquee diamond and diamond marquee shaped ring 1920c

Category

Vintage 1920s British Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire

Art Deco Platinum .71 Carat Diamond Engagement Ring with Calibré Cut Sapphires
Art Deco Platinum .71 Carat Diamond Engagement Ring with Calibré Cut Sapphires

Art Deco Platinum .71 Carat Diamond Engagement Ring with Calibré Cut Sapphires

Located in Brooklyn, NY

This platinum engagement ring dates to the 1920s. The central .71ct transitional cut diamond (G-H/VS1) surmounts an elaborate setting with diamonds set on the north and south sides a...

Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

Art Deco Style Platinum Calibre Cut Sapphire Ring With 0.70 Carat Diamond GIA
Art Deco Style Platinum Calibre Cut Sapphire Ring With 0.70 Carat Diamond GIA

Art Deco Style Platinum Calibre Cut Sapphire Ring With 0.70 Carat Diamond GIA

By Valérie Danenberg

Located in PARIS, FR

Inspired by the beauty of France's greatest queens, the Victorine engagement ring offers a bewitching and sparkling design. This ring is enhanced by its first row of caliber cut sapp...

Category

2010s French Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

Art Deco Style Platinum Calibre Cut Sapphire Ring With 0.75 Ct Diamond GIA CERT
Art Deco Style Platinum Calibre Cut Sapphire Ring With 0.75 Ct Diamond GIA CERT

Art Deco Style Platinum Calibre Cut Sapphire Ring With 0.75 Ct Diamond GIA CERT

By Valérie Danenberg

Located in PARIS, FR

Inspired by the beauty of the greatest queens of France, the Victorine double band engagement ring offers a bewitching and sparkling design. This ring is enhanced by its first row of...

Category

2010s French Art Deco Cluster Rings

Materials

Diamond, Sapphire, Platinum

Cushion Cut Diamond and Sapphire Art Deco Style Ring
Cushion Cut Diamond and Sapphire Art Deco Style Ring

Cushion Cut Diamond and Sapphire Art Deco Style Ring

Located in New York, NY

Platinum Cushion Cut Diamond and Calibré Sapphire Art Deco Style Ring; Cushion Diamond approximately 1.35ct; F-G color VS clarity, French

Category

2010s French Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

A Coral, Calibré Cut Ruby, Emerald, Sapphire and Diamond Platinum Dress Ring.
A Coral, Calibré Cut Ruby, Emerald, Sapphire and Diamond Platinum Dress Ring.

A Coral, Calibré Cut Ruby, Emerald, Sapphire and Diamond Platinum Dress Ring.

Located in Amsterdam, NL

In Art-Deco Egyptian Revival style, the cabochon coral flanked by a lotus flower, set with calibré cut rubies, emerald and sapphires, the pierced mount set with single cut (8/8) diam...

Category

21st Century and Contemporary Unknown Art Deco Cocktail Rings

Materials

Coral, Diamond, Emerald, Onyx, Ruby, Platinum

Art Deco Calibre Sapphire Diamond Dangle Earrings
Art Deco Calibre Sapphire Diamond Dangle Earrings

Art Deco Calibre Sapphire Diamond Dangle Earrings

Located in Chicago, IL

Finely crafted 18K white gold vintage earrings are channel set with calibre cut blue sapphires (estimated total weight 3 carats) and bright white old cut diamonds (old European and o...

Category

Early 20th Century Art Deco Dangle Earrings

Materials

Diamond, Sapphire

Antique French Early Art Deco Calibre Sapphire Diamond Engagement Ring
Antique French Early Art Deco Calibre Sapphire Diamond Engagement Ring

Antique French Early Art Deco Calibre Sapphire Diamond Engagement Ring

Located in Chicago, IL

Circa 1910 A French early Art Deco platinum topped 18K gold ring is centered with a bezel set old European diamond (5.3 x 4.05 mm, approximately 0.75 ct) framed by calibre cut synthe...

Category

Early 20th Century French Art Deco Engagement Rings

Materials

Diamond

Art Deco calibre cut sapphire platinum eternity band
Art Deco calibre cut sapphire platinum eternity band

Art Deco calibre cut sapphire platinum eternity band

Located in Beverly Hills, CA

This Art Deco calibre cut sapphire eternity band is a refined expression of precision, rhythm, and timeless design.

Category

Vintage 1920s Art Deco Wedding Rings

Materials

Sapphire, Platinum

Art Deco Three-Stone Diamond and Calibré Sapphire Ring
Art Deco Three-Stone Diamond and Calibré Sapphire Ring

Art Deco Three-Stone Diamond and Calibré Sapphire Ring

Located in New York, NY

An Art Deco three stone cushion-cut diamond ring with a calibré sapphire surround, in 18k gold and platinum.

Category

Vintage 1920s Art Deco Three-Stone Rings

Materials

Diamond, Sapphire, 18k Gold, Platinum

Art Deco Calibre Blue Sapphire Diamond Gold Platinum Ring
Art Deco Calibre Blue Sapphire Diamond Gold Platinum Ring

Art Deco Calibre Blue Sapphire Diamond Gold Platinum Ring

Located in Cape May, NJ

Art Deco Diamond and Calibre Blue Sapphire 18K Gold with Detailed Platinum Design Engagement Ring, Approximate Size US 6.25 The center diamond is a .20 carat Si1, G-H color old mi...

Category

Early 20th Century Art Deco Engagement Rings

Materials

Blue Sapphire, Diamond, 18k Gold, Platinum

Art Deco Platinum 5.00 Ct Aquamarine, Diamond & Calibre-Cut Sapphire Halo Ring
Art Deco Platinum 5.00 Ct Aquamarine, Diamond & Calibre-Cut Sapphire Halo Ring

Art Deco Platinum 5.00 Ct Aquamarine, Diamond & Calibre-Cut Sapphire Halo Ring

Located in Miami, FL

A spectacular Art Deco platinum ring centering a vibrant 5.00 carat emerald-cut aquamarine, framed by a dramatic double halo of diamonds and calibre-cut sapphires.

Category

Early 20th Century French Art Deco Cocktail Rings

Materials

Aquamarine, Diamond, Sapphire, Platinum

Art Deco Style Diamond and Blue Sapphire Calibre Cut 18 Karat White Gold Ring
Art Deco Style Diamond and Blue Sapphire Calibre Cut 18 Karat White Gold Ring

Art Deco Style Diamond and Blue Sapphire Calibre Cut 18 Karat White Gold Ring

Located in Tustin, CA

The center diamonds are surrounded by a contrasting halo of calibre cut square and tapered keystone blue sapphires.

Category

21st Century and Contemporary American Art Deco Cocktail Rings

Materials

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

Art Deco Style Diamond and Blue Sapphire Calibre Cut 18 Karat White Gold Ring
Art Deco Style Diamond and Blue Sapphire Calibre Cut 18 Karat White Gold Ring

Art Deco Style Diamond and Blue Sapphire Calibre Cut 18 Karat White Gold Ring

Located in Tustin, CA

Invisibly set baguette and shared prong set round diamonds give the illusion of a very large, cut corner rectangular step cut stone in the center of this custom estate ring. The cent...

Category

21st Century and Contemporary American Art Deco Cocktail Rings

Materials

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

Calibre Sapphire Diamond Stud Earrings
Calibre Sapphire Diamond Stud Earrings

Calibre Sapphire Diamond Stud Earrings

Located in New York, NY

A classic pair of diamond stud earrings surrounded with sapphires, set in Platinum. The two diamonds are estimated to weigh a total of 3 carats, H color, SI1 clarity. GIA Diamond Ce...

Category

Early 20th Century American Art Deco Stud Earrings

Materials

Diamond, Sapphire, Platinum

Antique Diamond Calibré Cut Sapphire Platinum Ring
Antique Diamond Calibré Cut Sapphire Platinum Ring

Antique Diamond Calibré Cut Sapphire Platinum Ring

Located in Chicago, IL

Circa 1915 The platinum ring is designed in early Art Deco taste as three radiating old European cut diamonds wrapped in a winding ribbon of channel-set calibré-cut sapphires.

Category

Early 20th Century Art Deco Cocktail Rings

Materials

Diamond, Sapphire, Platinum

Elegant Diamond and Calibre Cut Sapphire Ring
Elegant Diamond and Calibre Cut Sapphire Ring

Elegant Diamond and Calibre Cut Sapphire Ring

Located in New Orleans, LA

Geometric design and bold, contrasting color define this diamond and sapphire ring. A 1.22 carat diamond glistens in its center, surrounded by 1.84 carats of deep blue sapphires and ...

Category

Early 20th Century Art Deco Bridal Rings

Materials

Sapphire, Diamond, Platinum

Cartier Art Deco Diamond, Sapphire, and Platinum Arrow Jabot Brooch
Cartier Art Deco Diamond, Sapphire, and Platinum Arrow Jabot Brooch

Cartier Art Deco Diamond, Sapphire, and Platinum Arrow Jabot Brooch

By Cartier

Located in New York, NY

An Art Deco diamond and calibre sapphire jabot brooch in the form of an arrow, in platinum and 18k gold.

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Sapphire, 18k Gold, Platinum

Art Deco 1920s Platinum Old Cut Diamond and Sapphire Openwork Panel Ring
Art Deco 1920s Platinum Old Cut Diamond and Sapphire Openwork Panel Ring

Art Deco 1920s Platinum Old Cut Diamond and Sapphire Openwork Panel Ring

Located in Staines-Upon-Thames, GB

An Art Deco diamond, sapphire, and platinum ring, comprising one large old European cut diamond, sixteen smaller round cut diamonds, and four elongated calibre cut sapphires, set in ...

Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA 1.60 Carat Old Oval Diamond French Calibre Sapphire Engagement Platinum Ring
GIA 1.60 Carat Old Oval Diamond French Calibre Sapphire Engagement Platinum Ring

GIA 1.60 Carat Old Oval Diamond French Calibre Sapphire Engagement Platinum Ring

Located in New York, NY

This breathtakingly beautiful Art Deco dazzler finely crafted in handmade Platinum and presents a rather unusually horizontally set, bright and shining, Large center stone - a gorgeo...

Category

Vintage 1910s Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Deco 1920s Calibre Sapphire European Cut Diamond Platinum  Ring
Art Deco 1920s Calibre Sapphire European Cut Diamond Platinum  Ring

Art Deco 1920s Calibre Sapphire European Cut Diamond Platinum Ring

Located in Stamford, CT

Original 1920’s Art Deco tear drop shape platinum ring with bright European cut diamonds, surrounded by a rim of caliber cut bright blue sapphires.

Category

Early 20th Century Art Deco Fashion Rings

Materials

Diamond, Sapphire, Platinum

Wonderful Art Deco Bracelet with Calibre Set Faux Sapphires
Wonderful Art Deco Bracelet with Calibre Set Faux Sapphires

Wonderful Art Deco Bracelet with Calibre Set Faux Sapphires

By Ralph DeRosa

Located in New York, NY

Wonderful Art Deco Bracelet with Calibre Set Faux Sapphires.

Category

Vintage 1930s American Art Deco Link Bracelets

Materials

Gilt Metal

Antique Art Deco Platinum Old Diamond Calibre Cut Sapphire Dress Watch Bracelet
Antique Art Deco Platinum Old Diamond Calibre Cut Sapphire Dress Watch Bracelet

Antique Art Deco Platinum Old Diamond Calibre Cut Sapphire Dress Watch Bracelet

Located in Montclair, NJ

The case and bracelet are adorned with approximately 2.75 carats of very fine quality round single cut and old European diamonds while the case is also decorated with custom calibre ...

Category

Vintage 1920s Art Deco Wrist Watches

Materials

Diamond, Sapphire, Platinum

Original Antique Art Deco Diamond Five Stone and Calibre Sapphire Ring, 1920s
Original Antique Art Deco Diamond Five Stone and Calibre Sapphire Ring, 1920s

Original Antique Art Deco Diamond Five Stone and Calibre Sapphire Ring, 1920s

Located in OVIEDO, AS

Original Antique Art-Deco Diamond Five Stone and Calibre Sapphire Ring 1920s Mounted and tested in Platinum.

Category

Vintage 1920s European Art Deco Band Rings

Materials

Diamond, Sapphire, Platinum

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Art Deco Calibre Sapphire For Sale on 1stDibs

You are likely to find exactly the art deco calibre sapphire you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using Platinum, 18k Gold and Gold. In our selection of items, you can find a vintage example as well as a contemporary version. If you’re looking for an art deco calibre sapphire from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 20th Century while another version may have been produced as recently as the 21st Century. For this particular piece, 2 Carat and 2.5 Carat are consistently popular carat weights. A round cut version of this piece has appeal, but there are also old european cut and antique cushion cut versions for sale. If you’re browsing our inventory for an art deco calibre sapphire, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a Art Deco Calibre Sapphire?

The price for an art deco calibre sapphire starts at $1,800 and tops out at $77,000 with these rings, on average, selling for $10,175.

A Close Look at Art Deco Jewelry

Fascination with the Jazz Age is endless, and even today jewelry designers continue to be inspired by authentic Art Deco jewelry and watches.

The Art Deco period, encompassing the 1920s and ’30s, ushered in a very distinct look in the design of jewelry. There were many influences on the jewelry of the era that actually began to take shape prior to the 1920s. In 1909, Serge Diaghilev brought the Ballet Russes to Paris, and women went wild for the company’s exotic and vibrant costumes It’s no wonder, then, that jade, lapis lazuli, coral, turquoise and other bright gemstones became all the rage. There already existed a fascination with the East, particularly China and Japan, and motifs consisting of fans and masks started to show up in Art Deco jewelry.

However, the event that had the greatest influence on Deco was the excavation of the tomb of King Tut in 1922. When the world saw what was hidden in Tut’s burial chamber, it sent just about everyone into a frenzy. Pierre Cartier wrote in 1923 that “the discovery of the tomb will bring some sweeping changes in fashion jewelry.” And he couldn’t have been more right. “Egyptomania” left an indelible mark on all of the major jewelry houses, from Cartier to Van Cleef & Arpels, Boucheron and Georges Fouquet. (Cartier created some of the most iconic jewelry designs that defined this era.)

While a lot of Art Deco jewelry was black and white — the black coming from the use of onyx or black enamel and the white from rock crystal and diamonds — there is plenty of color in jewelry of the era. A perfect accent to diamonds in platinum settings were blue sapphires, emeralds and rubies, and these stones were also used in combination with each other.

Many designers employed coral, jade and lapis lazuli, too. In fact, some of the most important avant-garde jewelers of the period, like Jean Després and Jean Fouquet (son of Georges), would combine white gold with ebony and malachite for a jolt of color.

A lot of the jewelry produced during this time nodded to current fashion trends, and women often accessorized their accessories. The cloche hat was often accented with geometric diamond brooches or double-clip brooches. Backless evening dresses looked fabulous with sautoir necklaces, and long pearl necklaces that ended with tassels, popular during the Edwardian period, were favored by women everywhere, including Coco Chanel.

Find unique Art Deco necklaces, earrings, bracelets and other 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.