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Oscar Heyman Diamond Jewelry

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Oscar Heyman 5.11tcw Diamond Earrings
By Oscar Heyman
Located in New York City, NY
Oscar Heyman diamond drop earrings contain 4 pear shaped diamonds weighing 2.28tcw with 42 round
Category

2010s American Contemporary Drop Earrings

Materials

Diamond, Platinum

Oscar Heyman Platinum Diamond Bow Brooch
By Oscar Heyman
Located in New York City, NY
Oscar Heyman platinum bow brooch contains 39 round diamonds weighing 3.56cts (F-G/VS+). It is
Category

2010s American Contemporary Brooches

Materials

Diamond, Platinum

Oscar Heyman Platinum Diamond Bow Brooch
Oscar Heyman Platinum Diamond Bow Brooch
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W 1 in L 2.25 in
Oscar Heyman Diamond Platinum Bracelet
By Oscar Heyman
Located in New York, NY
A stunning bracelet created by Oscar Heyman. It's decorated with mixed shape diamonds and mounted
Category

21st Century and Contemporary American Bangles

Materials

Diamond, Platinum

Oscar Heyman Diamond Band Ring
By Oscar Heyman
Located in Darnestown, MD
This Oscar Heyman diamond band ring is dazzling in its sparkle. It has four rows of G color, VS
Category

Vintage 1980s American Modern Band Rings

Materials

Diamond, 18k Gold

Oscar Heyman Brothers Diamond Bracelet
By Oscar Heyman
Located in London, GB
Diamond bracelet by Oscar Heyman Brothers. An articulated two row bracelet set with three motifs of
Category

Vintage 1950s American Link Bracelets

Materials

Diamond, Platinum

Oscar Heyman Platinum Diamond Bracelet
By Oscar Heyman
Located in Houston, TX
Oscar Heyman Brothers bracelet composed of platinum featuring round-cut, emerald-cut and baguette
Category

Mid-20th Century American Link Bracelets

Materials

Diamond, Platinum

Oscar Heyman Platinum Diamond Bracelet
Oscar Heyman Platinum Diamond Bracelet
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W 0.38 in L 7.25 in
Oscar Heyman Sapphire Diamond Gold Brooch
By Oscar Heyman
Located in New York, NY
Retro Oscar Heyman Brothers gold, platinum, sapphire and diamond brooch. 18 kt., the polished
Category

Vintage 1940s American Retro Brooches

Materials

Diamond, Blue Sapphire, 18k Gold

Oscar Heyman Emerald & Diamond Earrings
By Oscar Heyman
Located in New York, NY
These exquisite Oscar Heyman earrings, crafted in 18k yellow gold, feature a graceful leaf-inspired
Category

20th Century American Retro Clip-on Earrings

Materials

Diamond, Emerald, 18k Gold

Oscar Heyman Platinum Diamond Earrings
By Oscar Heyman
Located in Beverly Hills, CA
Oscar Heyman Platinum Hand Made Cluster Earrings Containing 12 Pear Shape Diamonds 14 Marquise
Category

2010s American Clip-on Earrings

Materials

Diamond, Platinum

Oscar Heyman Platinum Diamond Earrings
Oscar Heyman Platinum Diamond Earrings
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W 0.75 in L 1.25 in
Oscar Heyman Diamond Platinum Engagement Ring
By Oscar Heyman
Located in Beverly Hills, CA
An elegant diamond ring by Oscar Heyman featuring a 1.35 carat marquise shape diamond, with a halo
Category

Late 20th Century Engagement Rings

Materials

Diamond, White Diamond, Platinum

Oscar Heyman Sapphire and Diamond Ring
By Oscar Heyman
Located in New Orleans, LA
American jewelry firm Oscar Heyman is known throughout the world for its high-quality, avant-garde designs
Category

21st Century and Contemporary American Modern Cluster Rings

Materials

Diamond, Sapphire, Platinum

Oscar Heyman Diamond Watch, 9.65 carats
By Oscar Heyman
Located in New Orleans, LA
buckle embellished with diamonds. Founded in New York in 1912, the American jewelry firm Oscar Heyman is
Category

21st Century and Contemporary American Modern Wrist Watches

Materials

Diamond, White Gold

Oscar Heyman Retro Ruby & Diamond Watch
By Oscar Heyman
Located in New York, NY
Oscar Heyman retro ruby and diamond watch Concealed flip dial of mechanical movement, rectangular
Category

20th Century Wrist Watches

Materials

Diamond, Ruby

Oscar Heyman Platinum 3.73tcw Diamond Snowflake Brooch
By Oscar Heyman
Located in New York City, NY
Oscar Heyman's platinum Snowflake brooch contains 43 colorless round diamonds weighing 3.73 tcw (F
Category

2010s North American Contemporary Brooches

Materials

Diamond, Platinum

Oscar Heyman Gold and Platinum Diamond Brooch
By Oscar Heyman
Located in New York City, NY
Oscar Heyman 18kt yellow gold and platinum brooch contains 17 round diamond weighing 1.11cts (F-G
Category

2010s American Contemporary Brooches

Materials

Diamond, Gold, Platinum

Oscar Heyman Pave Diamond Maple Leaf Brooch
By Oscar Heyman
Located in New York City, NY
Oscar Heyman 18kt yellow gold and platinum maple leaf brooch contains 119 round diamonds weighing
Category

2010s American Contemporary Brooches

Materials

Diamond, Emerald, 18k Gold, Platinum

Oscar Heyman Pave Diamond Maple Leaf Brooch
Oscar Heyman Pave Diamond Maple Leaf Brooch
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W 1.42 in D 0.32 in L 1.78 in
Oscar Heyman Diamond and Ruby Earrings
By Oscar Heyman
Located in New York, NY
Oscar Heyman diamond and ruby earrings. This pair of earrings has 22 rubies approximately 7-8
Category

Late 20th Century American Artist Clip-on Earrings

Materials

Diamond, Ruby, Platinum

Oscar Heyman Platinum 8.32ct Round Diamond Bracelet
By Oscar Heyman
Located in New York City, NY
This Oscar Heyman platinum bracelet contains 198 round diamonds weighing 8.32 cts. (F-G/VS quality
Category

2010s American Contemporary Modern Bracelets

Materials

Diamond, Platinum

Oscar Heyman Gold Diamond and Ruby Bow Brooch
By Oscar Heyman
Located in New York City, NY
diamonds (F-G/VS+). The rubies are cut by hand in Oscar Heyman's Madison Avenue workshop by the lapidary
Category

2010s American Contemporary Brooches

Materials

Diamond, Ruby, Gold

Oscar Heyman Gold Diamond and Ruby Bow Brooch
Oscar Heyman Gold Diamond and Ruby Bow Brooch
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W 1.93 in D 0.44 in L 1.19 in
Oscar Heyman Platinum Pave Diamond Star Earrings
By Oscar Heyman
Located in Venice, CA
These incredible Oscar Heyman earrings contain pave set diamonds of approximately two carats. The
Category

21st Century and Contemporary Contemporary Drop Earrings

Materials

Diamond, Platinum

Oscar Heyman Fancy Sapphire and Diamond Bracelet
By Oscar Heyman
Located in New Orleans, LA
makes a bold statement on the wrist. Founded in New York in 1912, the American jewelry firm Oscar
Category

21st Century and Contemporary Modern Modern Bracelets

Materials

Diamond, Sapphire, Platinum

Oscar Heyman Brothers Pink Sapphire & Diamond Bracelet
By Oscar Heyman
Located in New York, NY
Oscar Heyman Brothers Pink Sapphire & Diamond Bracelet A sophisticated piece by Oscar Heyman
Category

20th Century American Retro Retro Bracelets

Materials

Diamond, Pink Sapphire, 18k Gold

Oscar Heyman Ruby and Diamond Rosebud Ring
By Oscar Heyman
Located in New York City, NY
& Arpels, Cartier, and Tiffany & Co. Oscar Heyman jewelry is and always has been made in New York City at
Category

2010s American Contemporary Fashion Rings

Materials

Diamond, Ruby, 18k Gold, Platinum

Oscar Heyman diamond 18k yellow gold ring
By Oscar Heyman
Located in Beverly Hills, CA
This vintage Oscar Heyman ring sparkles with 0.90 carats of exceptional diamonds, elegantly set in
Category

Vintage 1980s Modern Cocktail Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold, Platinum

Oscar Heyman Diamond Platinum Floret Collar Necklace
By Oscar Heyman
Located in New York, NY
Oscar Heyman Diamond Floret Collar Necklace in Platinum. A classic collar-length necklace for any
Category

1990s American Chain Necklaces

Materials

Diamond, Platinum

Oscar Heyman Sapphire Diamond Pansy Brooch 18 Karat
By Oscar Heyman
Located in North Hollywood, CA
This Oscar Heyman Pansy is one of the most coveted brooches to own. It set with calibrated blue
Category

Early 2000s American Contemporary Brooches

Materials

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

Exquisite Oscar Heyman Bros. Diamond Platinum Bracelet
By Oscar Heyman
Located in New York, NY
Gorgeous platinum bracelet by Oscar Heyman Bros., set with baguette and round diamonds - total
Category

20th Century American More Bracelets

Materials

Diamond, Platinum

Spectacular Oscar Heyman Diamond Double-Clip Platinum Brooch
By Oscar Heyman
Located in Beverly Hills, CA
An absolute beauty from Oscar Heyman, famed American jewelry house. It is expertly crafted
Category

21st Century and Contemporary American Brooches

Materials

Diamond, Platinum

Oscar Heyman Ruby Diamond Gold Platinum Circle Brooch
By Oscar Heyman
Located in New York, NY
approx. 0.60ctw in diamonds. Brooch is 1 1/16" in diameter. Bears signature Oscar Heyman hallmark/ lines
Category

20th Century American Brooches

Materials

Diamond, Ruby, Gold, Platinum

Original Oscar Heyman Ruby and Diamond Bracelet
By Oscar Heyman
Located in New York, NY
Beautiful Original Oscar Heyman ruby and diamond bracelet circa 1980s crafted in 18k yellow gold
Category

20th Century American Modern Modern Bracelets

Materials

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

Oscar Heyman Bros. Exquisite Platinum Diamond Sapphire Brooch
By Oscar Heyman
Located in New York, NY
Platinum floral brooch by Oscar Heyman Bros., with blue sapphires and approx. 4.50ctw in diamonds
Category

20th Century American Brooches

Materials

Diamond, Sapphire, Platinum

Oscar Heyman Platinum Diamond and Sapphire Circle Brooch
By Oscar Heyman
Located in Chicago, IL
Circa 1960s Oscar Heyman Platinum Circle Brooch, set with Round Brilliant cut Diamonds totaling 1
Category

Vintage 1960s American Brooches

Materials

Diamond, Sapphire, Platinum

Oscar Heyman Yellow Gold Diamond Gemstone Flower Brooch
By Oscar Heyman
Located in New York, NY
/ HALLMARKS: Oscar Heyman METAL: Yellow Gold GEM STONE: Diamond 2.20 carats F/VVS-VS 30 Diamonds GEM STONE
Category

20th Century American Modern Brooches

Materials

Diamond, Yellow Gold

c.1960s OSCAR HEYMAN Diamond Platinum Bracelet
By Oscar Heyman
Located in Beverly Hills, CA
Elegant and timeless diamond bracelet created by Oscar Heyman in the 1960s. Inspired by strongly
Category

Vintage 1960s American More Bracelets

Materials

Diamond, Platinum

Oscar Heyman Yellow Sapphire And Diamond Bracelet
By Oscar Heyman
Located in New York, NY
Oscar Heyman Yellow Sapphire And Diamond Bracelet In platinum and 18k gold. Circa 1950. This
Category

Mid-20th Century American Contemporary Link Bracelets

Materials

Diamond, Yellow Sapphire, 18k Gold, Platinum

Oscar Heyman Yellow Sapphire and Diamond Ring
By Oscar Heyman
Located in New York, NY
Oscar Heyman Yellow Sapphire, Colored Stone and Diamond Ring in 18k white gold. Center of the ring
Category

21st Century and Contemporary American Artist Cocktail Rings

Materials

Green Sapphire, Yellow Sapphire, Blue Sapphire, Ruby, Emerald, Diamond, ...

1940s Oscar Heyman Sapphire Ruby Diamond Gold Brooch
By Oscar Heyman
Located in New York, NY
platinum and 18k gold; length: 2 5/8 in., by Oscar Heyman & Brothers.
Category

Vintage 1940s American Retro Brooches

Materials

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

Oscar Heyman Sapphire and Diamond Earrings
By Oscar Heyman
Located in Darnestown, MD
Delicate and graceful diamond and sapphire earrings by Oscar Heyman. The earrings have
Category

Vintage 1970s American Contemporary Lever-Back Earrings

Materials

18k Gold

Oscar Heyman Sapphire and Diamond Earrings
Oscar Heyman Sapphire and Diamond Earrings
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W 0.69 in L 1.25 in
Oscar Heyman Platinum Sapphire and Diamond Horseshoe Cufflink Pair
By Oscar Heyman
Located in New York City, NY
(1.79cts) and 20 round diamonds (0.90cts, F-G/ VS). The sapphires are cut by hand at Oscar Heyman's Madison
Category

2010s American Contemporary Cufflinks

Materials

Diamond, Sapphire, Platinum

Oscar Heyman Small Gold Pave Diamond Maple Leaf Brooch
By Oscar Heyman
Located in New York City, NY
Oscar Heyman 18kt yellow gold maple leaf brooch contains 66 round diamonds weighing 3.23cts (F-G/VS
Category

2010s American Contemporary Brooches

Materials

Diamond, Blue Sapphire, Gold

Oscar Heyman Multicolor Sapphire Earrings
By Oscar Heyman
Located in New Orleans, LA
jewelry firm Oscar Heyman is known throughout the world for its high-quality, avant-garde designs
Category

21st Century and Contemporary American Modern Stud Earrings

Materials

White Diamond, Sapphire, Blue Sapphire, Pink Sapphire, Yellow Sapphire, ...

Oscar Heyman 2.51ct Tsavorite & Baguette Diamond Pendant Necklace
By Oscar Heyman
Located in New York City, NY
Van Cleef & Arpels, Cartier, and Tiffany & Co. Oscar Heyman jewelry is and always has been made in New
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, Tsavorite, Platinum

Oscar Heyman Flying Egret Ruby and Diamond Bird Brooch
By Oscar Heyman
Located in New York City, NY
Oscar Heyman 18kt yellow gold and platinum flying egret bird brooch contains 245 round diamonds
Category

2010s American Contemporary Brooches

Materials

Diamond, Ruby, 18k Gold, Platinum

Oscar Heyman Red Ruby White Diamond Platinum Ring
By Oscar Heyman
Located in London, GB
A platinum, ruby and diamond ring by Oscar Heyman Brothers (OHB) set with 29 step cut red rubies
Category

20th Century American Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Ruby, Platinum

Oscar Heyman 18 Karat Platinum Sapphire Diamond Ring
By Oscar Heyman
Located in Cincinnati, OH
"Oscar Heyman creates jewelry that is as timeless as the very gemstones it holds." - Oscar Heyman
Category

Early 2000s American More Rings

Materials

Diamond, Sapphire, 18k Gold, Platinum

Oscar Heyman Platinum Tahitian Pearl and Diamond Ring
By Oscar Heyman
Located in New York City, NY
, Cartier, and Tiffany & Co. Oscar Heyman jewelry is and always has been made in New York City at the
Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, Pearl, 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

Oscar Heyman Belle Époque Diamond Bracelet, 19.50 carats
By Oscar Heyman
Located in New Orleans, LA
This dazzling Belle Époque diamond bracelet by the renowned Oscar Heyman is a masterpiece of early
Category

20th Century American Belle Époque Link Bracelets

Materials

Diamond, Platinum

Oscar Heyman Art Deco Emerald Onyx & Diamond Bracelet
By Oscar Heyman
Located in New York, NY
Oscar Heyman Art Deco Emerald, Onyx & Diamond Bracelet. A legendary multi-gem bracelet featuring 2
Category

Vintage 1920s American Art Deco Link Bracelets

Materials

Diamond, Emerald, Onyx, Platinum

Oscar Heyman 29.41 Diamond Bangle Bracelet Circa 1963
By Oscar Heyman
Located in Miami, FL
Sensational Oscar Heyman diamond bracelet circa 1963, finely crafted in platinum, featuring 19 Oval
Category

Vintage 1960s American Modern Modern Bracelets

Materials

Diamond, Platinum

Oscar Heyman Brothers Pansy Ring
By Oscar Heyman
Located in London, GB
Oscar Heyman Brothers pansy ring. Set with eighteen channel set calibre step cut natural unenhanced
Category

Vintage 1940s American Cocktail Rings

Materials

Amethyst, Diamond, Tourmaline, Platinum, Yellow Gold

Oscar Heyman Gold Platinum Fancy Color Diamond Necklace
By Oscar Heyman
Located in New York, NY
Oscar Heyman gold platinum fancy color diamond necklace 95 cut corner square diamonds of 13.47
Category

2010s Retro Bracelets

Materials

Diamond, Gold, 18k Gold, Yellow Gold, Platinum

Oscar Heyman Ruby, Sapphire and Diamond American Flag Brooch
By Oscar Heyman
Located in New Orleans, LA
Heyman. Using some of the most beautiful sparkling white diamonds, rubies and sapphires available, the
Category

21st Century and Contemporary American Modern Brooches

Materials

Diamond, Ruby, Sapphire, Platinum

Oscar Heyman Yellow Gold Diamond and Emerald Ring
By Oscar Heyman
Located in Chicago, IL
Circa 2000 Oscar Heyman 18K Yellow Gold Ring, set with alternating rows of Emeralds and Diamonds
Category

1990s American Cocktail Rings

Materials

Diamond, Emerald, 18k Gold

Oscar Heyman, 1.90 Carat Princess Cut Diamond Ring
By Oscar Heyman
Located in Chicago, IL
This gorgeous ring by Oscar Heyman Boasts a 1.90 carat Princess cut diamond flanked by two top
Category

Late 20th Century American Engagement Rings

Materials

Diamond, Platinum

Circa 1970s Oscar Heyman 18 Carat Diamond Bracelet
By Oscar Heyman
Located in Miami, FL
From the legendary house of Oscar Heyman, this exquisite bracelet, is expertly crafted in fine
Category

Vintage 1970s American Modern Modern Bracelets

Materials

Diamond, Platinum

Oscar Heyman "Burmese No Heat" Ruby and Diamond Brooch.
By Oscar Heyman
Located in New York, NY
Oscar Heyman Ruby and diamond pansy design. brooch. Center isset with oval ruby weighing 3.17
Category

Late 20th Century American Artist Brooches

Materials

Diamond, Ruby, Platinum

Oscar Heyman Diamond and Ruby Ring in Platinum
By Oscar Heyman
Located in Wailea, HI
Elevate Your Style with the Oscar Heyman Diamond and Ruby Ring in Platinum 💍 Indulge in the
Category

Mid-20th Century American Art Deco Engagement Rings

Materials

Diamond, Ruby, Platinum

Oscar Heyman 18Kt Yellow Gold Diamond Ruby Elephant Brooch
By Oscar Heyman
Located in New York, NY
Since 1912, Oscar Heyman has been creating magnificent jewelry with the finest gemstones sourced
Category

1990s American Retro Brooches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Oscar Heyman Platinum, Turquoise and 10.70 Carat Diamond Brooch
By Oscar Heyman
Located in Dallas, TX
accompanied by Certificate of Authenticity from Oscar Heyman, dated November 14, 2018. The eighteen turquoise
Category

Late 20th Century Brooches

Materials

Diamond, Turquoise, Platinum

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Oscar Heyman Diamond Jewelry For Sale on 1stDibs

You are likely to find exactly the piece of oscar heyman diamond jewelry 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, gold and 18k gold. In our selection of items, you can find a vintage example as well as a contemporary version. Making the right choice when shopping for an item from our selection of oscar heyman diamond jewelry may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 19th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. See these pages for a round cut iteration of this accessory, while there are also brilliant cut cut and oval cut cut versions available here, too. There aren’t many items for men if you’re seeking a choice in our collection of oscar heyman diamond jewelry, as most of the options available are for women and unisex.

How Much is a Oscar Heyman Diamond Jewelry?

On average, a piece of oscar heyman diamond jewelry at 1stDibs sells for $18,311, while they’re typically $75 on the low end and $900,000 for the highest priced versions of this item.

Oscar Heyman for sale on 1stDibs

Known as “the jewelers’ jeweler,” Oscar Heyman (1888–1970) designed pieces for Cartier, Tiffany & Co., Van Cleef & Arpels, Harry Winston and Black, Starr & Frost. The family-run Oscar Heyman & Brothers jewelry company was founded by Heyman with his brothers Nathan and Harry in 1912. Jewelers from Latvia, they had trained at their great-uncle’s workshop, which had clients including Russian imperial jeweler Fabergé, before immigrating to the United States in the early 1900s.

After arriving in New York, Oscar worked with Pierre Cartier and Nathan was a tool maker at Western Electric before they came together to open their jewelry business. Highly skilled craftsmen, the Heyman brothers quickly developed a roster of high-profile clients — primarily big-name jewelers — drawn to their work with dazzling stones and meticulous design. In 1917, Black, Starr & Frost commissioned the brothers to design an American flag brooch, which would become a recurring motif in the Oscar Heyman & Brothers portfolio. They also designed the Pansy brooch in the 1930s, another long-popular accessory that was produced exclusively for Tiffany & Co. toward the end of the 20th century. After Heyman designed for four of the five jewelers on view at the 1939 World’s Fair House of Jewels (Cartier, Udall & Ballou, Marcus & Co. and Black, Starr & Frost), the company was given the moniker “the jewelers’ jeweler.”

Heyman & Brothers later designed gem-encrusted medallions that traveled to the moon on Apollo 16, the necklace setting for the 69-carat diamond Richard Burton gave Elizabeth Taylor in 1969 and even a pair of ruby-encrusted Stuart Weitzman stilettos in 2003. Over the years, the company has entranced such clients as Evelyn Lauder, Marjorie Merriweather Post, Billy Porter and Tina Fey with its pieces.

In 2012, the century-old jeweler underwent a rebranding to simplify its name to Oscar Heyman and today is still run by the Heyman family, which manages the whole process from alloying their own metal to cutting and polishing their gemstones to assembling the final product in-house. In 2017, the Museum of Fine Arts, Boston published a monograph authored by Yvonne J. Markowitz and Elizabeth Hamilton that details for a broader audience the history of Oscar Heyman, an unsung company that’s long been behind some of the biggest names in jewelry.

Shop authentic Oscar Heyman rings, brooches and bracelets 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.