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Blue Diamond Art Deco

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1930s English Art Deco Kashmir sapphire diamond cluster ring
Located in London, GB
Art Deco Kashmir sapphire and diamond cluster ring. Centrally set with a cushion shape old cut
Category

Vintage 1930s British Art Deco Cluster Rings

Materials

Diamond, Blue Sapphire, White Gold

Art Deco 14k White Gold Diamond Chased Sapphire Ring
Located in Montreal, QC
One (1) lady ring in white 14 karat gold (stamped) art deco filigree style, polished and rhodium
Category

Vintage 1920s Canadian Art Deco Dome Rings

Materials

Diamond, Blue Sapphire, 14k Gold, White Gold

Art Deco 1920 Style hanging Earrings in Platinum with Diamonds and Sapphires
Located in Aventura, FL
silhouette. Period: 1920´s Style: Art Deco Metal: Platinum Stone: Natural Diamonds Measurement: 2.3 inches
Category

Vintage 1920s Art Deco Dangle Earrings

Materials

Diamond, White Diamond, Blue Diamond, Sapphire, Platinum

Diamond Sapphire Art Deco Style Ring Earrings White Gold Jewelry Set
By Unbranded
Located in Oakton, VA
Elevate your elegance with this stunning Diamond and Sapphire Art Deco Jewelry Set. Featuring a
Category

21st Century and Contemporary Art Deco Clip-on Earrings

Materials

Diamond, Blue Sapphire, 14k Gold, White Gold

1.88ct Fine Blue Emerald Cut Aquamarine And Diamond Art Deco Platinum Ring
Located in Birmingham, GB
Fine Natural Vivid Blue Aquamarine And Diamond Art Deco Style Five Stone Platinum Ring. 1.88 Total
Category

21st Century and Contemporary Engagement Rings

Materials

Aquamarine, Diamond, White Diamond, Platinum

3.51ct Fine Blue Emerald Cut Aquamarine And Diamond Art Deco Platinum Ring
Located in Birmingham, GB
Fine Natural Vivid Blue Aquamarine And Diamond Art Deco Style Five Stone Platinum Ring. 3.51 Total
Category

21st Century and Contemporary Fashion Rings

Materials

Aquamarine, Diamond, White Diamond, Platinum

Art Deco 18k Gold Platinum Ring with Sapphires Diamond
Located in Aventura, FL
Presenting an elegant Art Deco Ring, expertly crafted in 18k yellow gold with a platinum overlay
Category

Vintage 1920s Art Deco Engagement Rings

Materials

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

Antique Art Deco Platinum Old Euro Diamond Marquise Sapphire Bracelet - GIA
Located in Great Neck, NY
Beautiful Antique Art Deco Platinum Old European Diamond Marquise and Natural Sapphire Bracelet
Category

Vintage 1920s Art Deco Link Bracelets

Materials

Diamond, Blue Sapphire, Platinum

Late Deco 5.00ct Blue Zircon and Diamond Ring, c.1930s
Located in London, GB
Dating to the 1930s this late deco ring features a vibrant natural blue zircon at its centre
Category

Vintage 1930s British Art Deco Three-Stone Rings

Materials

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

Diamond Sapphire Vintage Inspired Art Deco Style Openwork Drop White Earrings
By Unbranded
Located in Oakton, VA
to shine. With their bold, geometric Art Deco style, these earrings offer a timeless, sophisticated
Category

21st Century and Contemporary Art Deco Drop Earrings

Materials

Diamond, Blue Sapphire, 14k Gold, White Gold

14K Gold Natural Blue Sapphire and Diamond Art Deco Style Three Stones Ring
Located in Bangkok, TH
Features three natural blue sapphires arranged vertically from top to bottom at the center, each
Category

21st Century and Contemporary Thai Edwardian Three-Stone Rings

Materials

Diamond, Blue Sapphire, Gold, 14k Gold, Yellow Gold

Art Deco Tri-Color Tourmaline Topaz Diamond Platinum Vintage Dinner Ring
Located in Philadelphia, PA
, 2.28, and 1.68 carats- respectively Featuring a clustered halo surround of old European cut diamonds
Category

Vintage 1930s Art Deco Fashion Rings

Materials

Diamond, Tourmaline, Blue Topaz, Platinum

2.3 Carat Total Diamond Natural Sapphire Art-Deco Style Platinum Stud Earrings
Located in AMSTERDAM, NL
favored by Art Deco designers to achieve contrast with diamonds and white metals to create their geometric
Category

2010s Dutch Art Deco Stud Earrings

Materials

Diamond, Blue Sapphire, Platinum

Platinum Art Deco Brooch 2.50ct Diamonds Calibre-Cut Sapphires, circa 1925
Located in Great Neck, NY
A captivating example of 1920s elegance, this authentic Art Deco brooch is finely handcrafted in
Category

Vintage 1920s European Art Deco Brooches

Materials

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

Art Deco 1940 Riviera Bracelet in 14Kt Gold with 9.26 Cts Diamonds Blue Spinel
Located in Miami, FL
An Art-Deco Riviera bracelet with gemstones. Very elegant piece from the late American Art-Deco
Category

Vintage 1940s American Art Deco More Bracelets

Materials

Diamond, Spinel, Gold, 14k Gold, White Gold

Art Deco Diamond and Sapphire 14 Karat White Gold Pendant
Located in Naples, FL
Art Deco style Diamond and blue Sapphire 14k white gold pendant with incredible metal work
Category

Vintage 1930s Unknown Art Deco Pendant Necklaces

Materials

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

Art Deco Diamond and Sapphire Barberpole Platinum Filigree Tennis Link Bracelet
Located in Beverly Hills, CA
This exquisite Art Deco platinum bracelet showcases a mesmerizing design featuring 6 carats of old
Category

Early 20th Century Unknown Art Deco Tennis Bracelets

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Cartier Art Deco Platinum, Diamond, and Buff-Top Sapphire Ring
By Cartier
Located in New York, NY
An Art Deco diamond and buff-top sapphire ring of asymmetrical geometric design, featuring an open
Category

Vintage 1930s Art Deco Band Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Antique Art Deco Sapphire Diamond 3-Stone Filigree Engagement Ring
Located in Santa Barbara, CA
An authentic Art Deco engagement ring, featuring a prominent French design crafted in the great
Category

Vintage 1920s Art Deco Three-Stone Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Sapphire and Diamond Art Deco Style Ring 14K White Gold
Located in Bangkok, TH
This Art Deco-inspired ring exudes timeless elegance, featuring a French-cut sapphire at its center
Category

21st Century and Contemporary Thai Art Deco Cocktail Rings

Materials

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

Vintage Art Deco Platinum Baguette Diamond and Sapphire Cocktail Ring - GIA
Located in Great Neck, NY
Beautiful Vintage Art Deco Platinum Baguette Diamond and Sapphire Cocktail Ring - GIA. This
Category

Vintage 1940s Art Deco Cocktail Rings

Materials

Diamond, Blue Sapphire, Platinum

Natural Blue Sapphire Diamond Art Deco Style Engagement Ring in Solid 9K Gold
Located in Bangkok, TH
a touch of sparkle. The ring is reminiscent of Art Deco jewelry, with its geometric patterns and
Category

21st Century and Contemporary Thai Edwardian Engagement Rings

Materials

Diamond, Blue Sapphire, 9k Gold, White Gold

Antique Art Deco Platinum Trillion Cut Diamond and Sapphire Eternity Band
Located in Great Neck, NY
Beautiful Antique Art Deco Platinum Trillion Cut Diamond and Sapphire Eternity Band. This amazing
Category

Vintage 1920s Art Deco Wedding Rings

Materials

Diamond, Blue Sapphire, Platinum

French Modern 2, 03 Carat Sapphire Diamonds Art Deco Style Ring
Located in Poitiers, FR
beautiful sapphire diamond platinum ring is inspired by a great classic, the art deco sapphire ring
Category

21st Century and Contemporary French Art Deco More Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Art Deco Style Sapphire and Diamond White Gold Brooch
Located in Greenwich, CT
Deco style. Gorgeous architecture and platinum wirework highlights 2.75 ct. of brilliant round diamonds
Category

Late 20th Century Unknown Art Deco Brooches

Materials

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

Art Deco Inspired Diamond Sapphire Ring 18k White Gold
Located in BEVERLY HILLS, CA
Art Deco inspired ring with a rose cut diamond and French cut sapphires. 1.18ct center rose cut
Category

Vintage 1920s Art Deco Cocktail Rings

Materials

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

Art Deco Style Platinum Ring With 1.85 Ct Sapphire and Diamond Baguettes
Located in North Miami, FL
This lovely art deco ring has swirls of diamond baguettes that are 3/4 of a carat surrounded by
Category

Vintage 1930s Unknown Art Deco Cocktail Rings

Materials

Diamond, Blue Sapphire, Sapphire, Platinum

Art Deco Style Sapphire Diamond 18 Karat White Gold Ring
By Baume
Located in Poitiers, FR
was inspired by the clean cut modern lines of the Art Deco movement. It is composed of a square design
Category

21st Century and Contemporary French Art Deco Engagement Rings

Materials

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

Art Deco Style Sapphire Diamond and 18 Karat Gold Ring
Located in Monte Carlo, MC
blue and the diamonds G VS .
Category

Late 20th Century Art Deco Cocktail Rings

Materials

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

Art Deco Blue Sapphire and Diamonds 14K White Gold Engagement Ring Fine Jewelry
By VR Jewels
Located in New York, NY
the shoulders — totaling 0.42 carats. The classic yet timeless Art Deco-inspired design makes it a
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

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

Aquamarine and Blue Sapphire Art Deco Style Stud Earrings in 14K White Gold
Located in Bangkok, TH
A radiant round aquamarine at the center, encircled by a sparkling diamonds. Four round blue
Category

21st Century and Contemporary Thai Art Deco Stud Earrings

Materials

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

Art Deco 14K White Gold Natural No Heat Cornflower Blue Sapphire 1.50CTW Ring
Located in Cape May, NJ
Art Deco 14k white gold natural no heat cornflower blue sapphire 1.50ctw ring Era: Art Deco
Category

Vintage 1920s Art Deco More Rings

Materials

Diamond, Blue Sapphire, White Gold

Vintage Art Deco Style Blue Sapphire Cluster Bangle Bracelet in 14k White Gold
Located in Miami, FL
Vintage, Art Deco-inspired, Blue Sapphire bangle in 14 karat solid white gold. Consistent with the
Category

Early 2000s Art Deco Bangles

Materials

Diamond, Blue Sapphire, 14k Gold, White Gold

Platinum Sapphire and Diamond Half-Moon Shaped Art Deco Style Engagement Ring
Located in Scottsdale, AZ
Platinum sapphire and diamond half-moon shaped Art Deco style engagement ring. Showcasing two fancy
Category

20th Century Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

14K Yellow Gold Blue Sapphire and Diamond Art Deco Style Three stone Dinner Ring
Located in Bangkok, TH
Three deep blue sapphires take center stage in this vintage-style three-stone ring, flanked by
Category

21st Century and Contemporary Thai Edwardian Solitaire Rings

Materials

Blue Sapphire, Diamond, Yellow Gold, 14k Gold

Art Deco Style Platinum Cocktail Ring 14.65 CTW Aquamarine, Sapphires, Diamonds
Located in Aventura, FL
: Art Deco style Metal: Platinum Stone: Natural Diamonds, Sapphires & Aquamarine Ring size: 7 (sizable
Category

1990s Art Deco Cocktail Rings

Materials

Aquamarine, Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Blue Sapphire Diamond South Sea Pearl Drop Earrings Art Deco Design Ella Gafter
By Ella Gafter
Located in New York, NY
The blue sapphire, diamond and South Sea pearl earrings feature a design with faceted round cut
Category

21st Century and Contemporary Italian Artist Drop Earrings

Materials

White Diamond, Onyx, South Sea Pearl, Blue Sapphire, Diamond, Pearl, 18k...

Emerald Sapphire Diamond Art Deco Style Statement 14K White Gold Ring
By Unbranded
Located in Oakton, VA
A gorgeous emerald and blue sapphires are presented in classic Art Deco style. The center emerald
Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

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

.33 Carat Old European Diamond Blue Sapphire White Gold Art Deco Men s Ring
Located in Stamford, CT
Vintage Art Deco handmade 18k white gold .33 carat Old European cut diamond men's ring circa 1936
Category

Early 20th Century More Rings

Materials

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

Art Deco 1.95 Carat Ceylon Sapphire and Diamond Platinum Ring
Located in Montgomery, AL
than the traditional deep blue sapphires of other origins. This Art Deco platinum ring features a
Category

Early 20th Century Art Deco Cocktail Rings

Materials

White Diamond, Blue Sapphire, Platinum

Art Deco Diamond Ring Solid 14k Yellow / White Gold Hand Engraved 0.70ct Diamond
Located in Long Beach, CA
STONE / WEIGHT: .7 Cts. SIZE: 6.25 LIFETIME SERVICE COMMITMENT This ladies Classic Art Deco Diamond
Category

Early 20th Century American Art Deco More Rings

Materials

Diamond, Blue Sapphire, 14k Gold

Diamond Art Deco Style Drop 14K Two Tone Gold Dangle Earrings
By Unbranded
Located in Oakton, VA
These lovely vintage style Art Deco diamond and sapphire earrings are hand crafted in 14k two tone
Category

21st Century and Contemporary Art Deco Drop Earrings

Materials

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

Art Deco Style Platinum Ring with 3.90 CTW in Diamonds and Sapphires
Located in Aventura, FL
This exquisite Art Deco style ring showcases the era's love for geometric precision and bold design
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

Antique Art Deco Platinum Natural Old Cut Sapphire Diamond Engagement Ring - GIA
Located in Great Neck, NY
Beautiful Antique Art Deco Platinum Natural Old Cut Sapphire Diamond Engagement Ring - GIA. This
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

COLLINGWOOD SON London Art-Deco Cufflinks In 18Kt Gold Sapphires Diamonds
Located in Miami, FL
Pair of art-deco cufflinks designed by Collingwood. These are a magnificent pair of gems-set
Category

Vintage 1930s English Art Deco Cufflinks

Materials

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

Art Deco 1920 18kt Gold and Platinum Ring with Diamonds Sapphires
Located in Aventura, FL
This exquisite Art Deco ring is masterfully crafted in luxurious 18k yellow gold and platinum
Category

Vintage 1920s Art Deco Engagement Rings

Materials

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

Art Deco Blue Sapphire Star Ring from Late 1930s 18 Karat White Gold
Located in Boston, MA
1930s Late Art Deco 12 Carat Star Sapphire Diamond 18 kt White Gold Cocktail Ring This cocktail
Category

Vintage 1930s Art Deco Cocktail Rings

Materials

Diamond, Star Sapphire, Blue Sapphire, White Gold

Antique Art Deco Raymond Yard Old Euro Diamond and Sapphire Bracelet - GIA
By Raymond C. Yard
Located in Great Neck, NY
Beautiful Antique Art Deco Raymond Yard Old European Diamond and Sapphire Engraved Floral Bracelet
Category

Vintage 1920s Art Deco Link Bracelets

Materials

Diamond, Blue Sapphire, Platinum

FRENCH 1925 Art-Deco Platinum Cocktail Ring With 4.88 Ctw Sapphires Diamonds
Located in Miami, FL
A French art-deco cocktail ring. This is a beautiful cocktail ring created in Paris France during
Category

Vintage 1920s French Art Deco Cocktail Rings

Materials

Diamond, Sapphire, White Diamond, Blue Sapphire, Platinum

Art Deco Tutti Frutti Bracelet
Located in New York, NY
Art Deco Tutti Frutti Bracelet A bracelet set with 24 carved rubies, emeralds, and sapphires
Category

Early 20th Century Unknown Art Deco Retro Bracelets

Materials

Diamond, Emerald, Ruby, Blue Sapphire, Platinum

Blue Sapphire Beads White Diamond 18K White Gold Belt Buckle Deco Bracelet
By Unbranded
Located in Oakton, VA
with precious diamonds and gemstones, each piece is a wearable work of art. With meticulous attention
Category

21st Century and Contemporary Art Deco Link Bracelets

Materials

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

Art Deco Ring in Platinum Sapphire and Diamonds 1920 1930
Located in Paris, FR
Marquise ring circa 1920-1930 in platinum set with calibrated diamonds and sapphires. This ring
Category

Vintage 1920s French Art Deco Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Art Deco Style 1.02 Carat H/SI Diamond Sapphire Engagement Ring
By Belrose Estate Jewelers
Located in Santa Barbara, CA
An intriguing revivalist Art Deco diamond engagement ring. A blazing, brilliant 1.02 carat
Category

Vintage 1980s Art Deco Engagement Rings

Materials

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

Laura Gallon Art Deco 18K White Gold Tourmaline Sapphire Diamond Necklace
Located in Los Angeles, US
arrangement of Blue Sapphires, Diamonds, and smaller Paraiba Tourmalines. Echoing the opulence and symmetry of
Category

2010s French Art Deco Pendant Necklaces

Materials

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

Sapphire Diamond Art Deco Style Engagement Ring in 18K White Gold
Located in Bangkok, TH
with a symbol as striking as your story. Ring Information Style: Art-deco Metal: 18K White Gold Total
Category

21st Century and Contemporary Thai Art Deco Engagement Rings

Materials

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

Art Deco 0.20 Carat Old Cut Diamond and Sapphire Ring
Located in London, GB
Here we have a delightful piece from a time when the Art Deco style was at the height of design. A
Category

Vintage 1930s Art Deco Fashion Rings

Materials

Diamond, Blue Sapphire, Gold, Yellow Gold, Platinum

ART DECO 1930 Platinum Dangle earrings With 10.14 Ctw In Diamonds Sapphires
Located in Miami, FL
An American art deco dangle earrings with diamonds & sapphires. This is a beautiful pair of
Category

Vintage 1930s American Art Deco Dangle Earrings

Materials

Diamond, Sapphire, White Diamond, Blue Sapphire, Platinum

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Blue Diamond Art Deco For Sale on 1stDibs

Find the exact blue diamond art deco you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using Platinum, Gold and 18k Gold. You can easily find a 2249 antique edition and 567 modern creations to choose from as well. Making the right choice when shopping for a blue diamond art deco 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. For this particular accessory, there are many different carat weights to choose from, but .5 Carat and 1 Carat versions are of considerable interest. A blue diamond art deco from Tutti Frutti Jewellery, Luigi Ferrara and Tiffany Co. — each of whom created a beautiful version of this treasured accessory — is worth considering. Today, if you’re looking for a round cut version of this piece and are unable to find the perfect match, our selection also includes old european cut and oval cut alternatives. When shopping for a blue diamond art deco, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Blue Diamond Art Deco?

Prices for a blue diamond art deco can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $297 and can go as high as $325,000, while this accessory, on average, fetches $5,799.

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.