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Tiffany 1 Carat

Tiffany & Co .1 Carat Ruby Yellow Gold Unicorn Brooch
Tiffany & Co .1 Carat Ruby Yellow Gold Unicorn Brooch

Tiffany & Co .1 Carat Ruby Yellow Gold Unicorn Brooch

By Tiffany & Co.

Located in Stamford, CT

Tiffany's. 1 round red ruby, approx. .1ct 18k yellow gold Stamped: 18k Hallmark: Tiffany 12.9 grams Top

Category

Late 20th Century Brooches

Materials

Ruby, Gold, 18k Gold, Yellow Gold

Tiffany & Co. Antique Platinum Emerald and Diamond 1 Carat Cluster Ring
Tiffany & Co. Antique Platinum Emerald and Diamond 1 Carat Cluster Ring

Tiffany & Co. Antique Platinum Emerald and Diamond 1 Carat Cluster Ring

By Tiffany & Co.

Located in Chicago, IL

This exceptional antique Tiffany & Co. ring showcases a striking natural emerald set at the

Category

Vintage 1970s American Retro Cocktail Rings

Materials

Diamond, Emerald, Platinum

Tiffany & Co. Platinum Round Diamond Wedding Band, 1 Carat, Size 4.5
Tiffany & Co. Platinum Round Diamond Wedding Band, 1 Carat, Size 4.5

Tiffany & Co. Platinum Round Diamond Wedding Band, 1 Carat, Size 4.5

By Tiffany & Co.

Located in New York, NY

This exquisite band by Tiffany & Co. features a captivating array of round diamonds totaling 1

Category

21st Century and Contemporary American Contemporary Wedding Rings

Materials

Diamond, Platinum

Certified Tiffany & Co. 1 Carat F VVS1 Lucida Diamond Platinum Engagement Ring
Certified Tiffany & Co. 1 Carat F VVS1 Lucida Diamond Platinum Engagement Ring

Certified Tiffany & Co. 1 Carat F VVS1 Lucida Diamond Platinum Engagement Ring

By Tiffany & Co.

Located in Chicago, IL

proportioned 1-carat Lucida® diamond, Tiffany’s signature cut-cornered square mixed cut known for its

Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. T Wire Diamond Bracelet 6 1/4" - White Gold 18k Rnd .24ctw Bangle
Tiffany & Co. T Wire Diamond Bracelet 6 1/4" - White Gold 18k Rnd .24ctw Bangle

Tiffany & Co. T Wire Diamond Bracelet 6 1/4" - White Gold 18k Rnd .24ctw Bangle

By Tiffany & Co.

Located in Greensboro, NC

Retail Price: $5300 Brand: Tiffany & Co. Collection: T Design: Wire Metal Content: 18k White

Category

21st Century and Contemporary Bangles

Materials

Diamond, 18k Gold, White Gold

Tiffany & Co. T Narrow Pave Diamond Band -White Gold 18k Rd .45ctw Ring Sz 6 1/2
Tiffany & Co. T Narrow Pave Diamond Band -White Gold 18k Rd .45ctw Ring Sz 6 1/2

Tiffany & Co. T Narrow Pave Diamond Band -White Gold 18k Rd .45ctw Ring Sz 6 1/2

By Tiffany & Co.

Located in Greensboro, NC

Retail Price: $6,950 Size: 6 1/2 Brand: Tiffany & Co. Collection: T Design: Narrow Pave Ring

Category

21st Century and Contemporary Band Rings

Materials

Diamond, 18k Gold, White Gold

Tiffany & Co. 1 ct Princess Cut Diamond Ring with Luxury Setting
Tiffany & Co. 1 ct Princess Cut Diamond Ring with Luxury Setting

Tiffany & Co. 1 ct Princess Cut Diamond Ring with Luxury Setting

Located in Guangzhou, CN

Tiffany & Co. 1.0 ct Princess Cut Diamond Ring with Luxury Setting, Size 51 Comes with original box

Category

2010s American Band Rings

Materials

Diamond, Platinum

Tiffany & Company White Gold and Diamond Atlas Collection Ladies Quartz Watch
Tiffany & Company White Gold and Diamond Atlas Collection Ladies Quartz Watch

Tiffany & Company White Gold and Diamond Atlas Collection Ladies Quartz Watch

By Tiffany & Co.

Located in Chicago, IL

cut Diamonds totaling approximately 1 Carat. Original Tiffany Black Satin Strap with Tiffany & Co

Category

2010s American Wrist Watches

Materials

Diamond, 18k Gold, White Gold

Recent Sales

GIA Certified 1 Carat Round Tiffany Style Solitaire Engagement Platinum Ring
GIA Certified 1 Carat Round Tiffany Style Solitaire Engagement Platinum Ring

GIA Certified 1 Carat Round Tiffany Style Solitaire Engagement Platinum Ring

Located in London, GB

in the classic 6 claw Tiffany style setting. All ring sizes available as made to order and hand

Category

21st Century and Contemporary British Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1 Carat Round Tiffany Style White Gold Solitaire Engagement Ring
GIA Certified 1 Carat Round Tiffany Style White Gold Solitaire Engagement Ring

GIA Certified 1 Carat Round Tiffany Style White Gold Solitaire Engagement Ring

Located in London, GB

the classic 6 claw Tiffany style setting. All ring sizes available as made to order and hand finished

Category

21st Century and Contemporary British Engagement Rings

Materials

Diamond, 18k Gold

White Gold 1 Carat Round Diamond Tiffany & Co. Style Solitaire Engagement Ring
White Gold 1 Carat Round Diamond Tiffany & Co. Style Solitaire Engagement Ring

White Gold 1 Carat Round Diamond Tiffany & Co. Style Solitaire Engagement Ring

Located in London, GB

white gold in the classic 6 claw Tiffany style setting. Size N (may be re-sized 2 sizes up or down) and

Category

21st Century and Contemporary British Engagement Rings

Materials

Diamond, 18k Gold

White or Yellow Gold 1 Carat Round Diamond Tiffany & Co. Style Engagement Ring
White or Yellow Gold 1 Carat Round Diamond Tiffany & Co. Style Engagement Ring

White or Yellow Gold 1 Carat Round Diamond Tiffany & Co. Style Engagement Ring

Located in London, GB

gold classic 6 claw Tiffany style setting. All ring sizes available as made to order and hand finished

Category

21st Century and Contemporary British Engagement Rings

Materials

Diamond, 18k Gold

Tiffany & Co. 1 Carat Sapphire Band
Tiffany & Co. 1 Carat Sapphire Band

Tiffany & Co. 1 Carat Sapphire Band

By Tiffany & Co.

Located in Miami, FL

18k yellow gold Tiffany & Co. band featuring 11 sapphires weighing approximately 1cts total. The

Category

21st Century and Contemporary American Band Rings

Materials

Blue Sapphire, 18k Gold, Yellow Gold

Tiffany & Co. 1 Carat Ruby Band
Tiffany & Co. 1 Carat Ruby Band

Tiffany & Co. 1 Carat Ruby Band

By Tiffany & Co.

Located in Miami, FL

18k yellow gold Tiffany & Co. band featuring 11 rubies weighing approximately 1ct total. The

Category

21st Century and Contemporary American Band Rings

Materials

Ruby, 18k Gold, Yellow Gold

Tiffany & Co. 1 Carat Diamond Solitaire Engagement Ring
Tiffany & Co. 1 Carat Diamond Solitaire Engagement Ring

Tiffany & Co. 1 Carat Diamond Solitaire Engagement Ring

By Tiffany & Co.

Located in Bethesda, MD

From Tiffany & Co, a 1 carat diamond set in a Tiffany knife's edge 18 karat and platinum

Category

2010s American Engagement Rings

Materials

Diamond, 18k Gold, Platinum

Tiffany & Co. Victoria 1 Carat Diamond Platinum Drop Dangle Earrings
Tiffany & Co. Victoria 1 Carat Diamond Platinum Drop Dangle Earrings

Tiffany & Co. Victoria 1 Carat Diamond Platinum Drop Dangle Earrings

By Tiffany & Co.

Located in Southampton, PA

Platinum "Victoria" Diamond Drop Dangle Earrings by Tiffany & Co. With 8 marque brilliant cut

Category

1990s American Drop Earrings

Materials

Diamond, Platinum

Estate Tiffany & Co. 1 Carat Diamond Wedding Band Platinum Wide Ring
Estate Tiffany & Co. 1 Carat Diamond Wedding Band Platinum Wide Ring

Estate Tiffany & Co. 1 Carat Diamond Wedding Band Platinum Wide Ring

By Tiffany & Co.

Located in Torrance, CA

diamonds are channel set into the band and total an estimated 1 carat (estimated at F-G color and VVS1

Category

Mid-20th Century Unknown Modern Band Rings

Materials

Diamond, Platinum

1980s Tiffany & Co. 1 Carat Emerald and Diamond Platinum Yellow Gold Ring
1980s Tiffany & Co. 1 Carat Emerald and Diamond Platinum Yellow Gold Ring

1980s Tiffany & Co. 1 Carat Emerald and Diamond Platinum Yellow Gold Ring

By Tiffany & Co.

Located in Hicksville, NY

Tiffany & Co Engagement Ring featuring 1 carat Emerald and .50 carat total weight Diamonds Two-Tone

Category

Vintage 1980s Unknown Retro Engagement Rings

Materials

Diamond, Emerald, 18k Gold, Platinum

Tiffany & Co Atlas Gold and Platinum 1 Carat Natural Diamond Necklace Circa 1995
Tiffany & Co Atlas Gold and Platinum 1 Carat Natural Diamond Necklace Circa 1995

Tiffany & Co Atlas Gold and Platinum 1 Carat Natural Diamond Necklace Circa 1995

By Tiffany & Co.

Located in Los Angeles, CA

Magnificent Signed Tiffany & Co, Platinum and 18k Yellow Gold 1 carat Natural Diamond Necklace

Category

1990s North American Retro Choker Necklaces

Materials

Diamond, Gold, Platinum

Platinum Tiffany & Co Ring with Diamond 0.72 carat
Platinum Tiffany & Co Ring with Diamond 0.72 carat

Platinum Tiffany & Co Ring with Diamond 0.72 carat

By Tiffany & Co.

Located in AMSTELVEEN, NH

. Item Specifications: Brand: Tiffany & Co Model: The Tiffany Setting Diamond: 1 piece Diamond Carat

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Platinum Tiffany & Co Ring
Platinum Tiffany & Co Ring

Platinum Tiffany & Co Ring

By Tiffany & Co.

Located in AMSTELVEEN, NH

: Brand: Tiffany & Co Diamonds: 1 piece Diamond Carat: 0.46 carat Diamond Cut: Brilliant cut Diamond Color

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Platinum Tiffany & Co Ring with a Diamond
Platinum Tiffany & Co Ring with a Diamond

Platinum Tiffany & Co Ring with a Diamond

By Tiffany & Co.

Located in AMSTELVEEN, NH

Tiffany Setting Diamond: 1 piece Diamond Carat: 0.40 carat Diamond Cut: Brilliant cut Diamond Color: E

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum, Gold, 18k Gold

Tiffany & Co. Diamond and Platinum Ear Pendant Earrings
Tiffany & Co. Diamond and Platinum Ear Pendant Earrings

Tiffany & Co. Diamond and Platinum Ear Pendant Earrings

By Tiffany & Co.

Located in New York City, NY

Elegant diamond and platinum ear pendants by Tiffany & Co. They feature 1 carat of high grade

Category

21st Century and Contemporary Dangle Earrings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Stud Earrings in Platinum Estate Jewelry
Tiffany & Co. Diamond Stud Earrings in Platinum Estate Jewelry

Tiffany & Co. Diamond Stud Earrings in Platinum Estate Jewelry

By Tiffany & Co.

Located in Beverly Hills, CA

diamond earrings. As to the size of diamonds, for daily wear you can go between a quarter and 1 carat

Category

1990s American Stud Earrings

Materials

White Diamond, Platinum

Tiffany & Company White Gold and Diamond Atlas Collection Ladies Quartz Watch
Tiffany & Company White Gold and Diamond Atlas Collection Ladies Quartz Watch

Tiffany & Company White Gold and Diamond Atlas Collection Ladies Quartz Watch

By Tiffany & Co.

Located in Chicago, IL

Brilliant cut Diamonds totaling approximately 1 Carat. Original Tiffany Black Satin Strap with Tiffany & Co

Category

Early 2000s American Wrist Watches

Materials

Diamond, 18k Gold, White Gold

18 Karat White Gold Tiffany & Co. Frank Gehry Fish Drop Diamond Earrings
18 Karat White Gold Tiffany & Co. Frank Gehry Fish Drop Diamond Earrings

18 Karat White Gold Tiffany & Co. Frank Gehry Fish Drop Diamond Earrings

By Frank Gehry for Tiffany & Co.

Located in New York, NY

Tiffany & Co Frank Gehry Fish Drop Diamond Earrings with original Tiffany Turquoise Pouch. Aprox 1

Category

21st Century and Contemporary American More Earrings

Materials

White Diamond, 18k Gold, White Gold

Tiffany & Co. 1 Carat diamond Band  ring
Tiffany & Co. 1 Carat diamond Band  ring

Tiffany & Co. 1 Carat diamond Band ring

By Tiffany & Co.

Located in Miami, FL

18k yellow gold Tiffany & Co. band featuring 11 carre cut diamonds weighing approximately 1cts

Category

21st Century and Contemporary American Band Rings

Materials

Diamond, White Diamond, 18k Gold, Yellow Gold

Tiffany & Co. Victoria Platinum 1 Carat Aquamarine Diamond Ring
Tiffany & Co. Victoria Platinum 1 Carat Aquamarine Diamond Ring

Tiffany & Co. Victoria Platinum 1 Carat Aquamarine Diamond Ring

By Tiffany & Co.

Located in Hicksville, NY

Tiffany and Co. Victoria Ring - Platinum, Aquamarine, Diamonds Features: 1.0 carat Aquamarine 1.0

Category

Early 2000s American Contemporary Engagement Rings

Materials

Aquamarine, Diamond, Platinum

2005 Tiffany & Co. 1 Carat Diamond Platinum Star Brooch
2005 Tiffany & Co. 1 Carat Diamond Platinum Star Brooch

2005 Tiffany & Co. 1 Carat Diamond Platinum Star Brooch

By Tiffany & Co.

Located in Hicksville, NY

2005 Tiffany and Co. Platinum and Diamond Star Brooch, Lapel Pin Features 1.0 carat total weight

Category

21st Century and Contemporary American Modern Brooches

Materials

Diamond, Platinum

Tiffany & Co 1 Carat Square Step Cut Diamond and Platinum Engagement Ring
Tiffany & Co 1 Carat Square Step Cut Diamond and Platinum Engagement Ring

Tiffany & Co 1 Carat Square Step Cut Diamond and Platinum Engagement Ring

By Tiffany & Co.

Located in Chicago, IL

Tiffany & Company Engagement Ring, 2 M.M. wide Platinum mounting with a 4 prong head, set with a 1

Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Deposit 1/3 for GIA Vintage TIFFANY & Co Pink Sapphire Diamond Platinum Ring
Deposit 1/3 for GIA Vintage TIFFANY & Co Pink Sapphire Diamond Platinum Ring

Deposit 1/3 for GIA Vintage TIFFANY & Co Pink Sapphire Diamond Platinum Ring

By Tiffany & Co.

Located in New York, NY

This item is Sale Pending so cannot be purchased at this time. GIA Vintage TIFFANY & Co 2.60ctw

Category

Early 2000s North American Modern Engagement Rings

Materials

Diamond, Pink Sapphire, Platinum

Tiffany & Co. T Diamond 5.5mm Wide Band Yellow Gold 18k Rnd .12ctw Ring Sz 8 1/2
Tiffany & Co. T Diamond 5.5mm Wide Band Yellow Gold 18k Rnd .12ctw Ring Sz 8 1/2

Tiffany & Co. T Diamond 5.5mm Wide Band Yellow Gold 18k Rnd .12ctw Ring Sz 8 1/2

By Tiffany & Co.

Located in Greensboro, NC

Retail Price: $4350 Size: 8 1/2 Brand: Tiffany & Co. Collection: T Design: 5.5mm Wide Metal

Category

21st Century and Contemporary Band Rings

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany & Co. White Gold Diamond Quartz Wristwatch
Tiffany & Co. White Gold Diamond Quartz Wristwatch

Tiffany & Co. White Gold Diamond Quartz Wristwatch

By Tiffany & Co.

Located in Chicago, IL

1 Carat. Tiffany & Co. Leather backed Black Grosgrain Strap with Tiffany White Gold Buckle

Category

Early 2000s American Wrist Watches

Materials

Diamond, 18k Gold

Tiffany & Co. Diamond Platinum Ring
Tiffany & Co. Diamond Platinum Ring

Tiffany & Co. Diamond Platinum Ring

By Tiffany & Co.

Located in Beverly Hills, CA

This lovely Tiffany & Co. ring features 1 carat of round cut diamonds. The three center diamonds

Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond, Platinum

Tiffany & Co. Platinum and Diamond Princess Cut Ring 1.11 Carat H IF New
Tiffany & Co. Platinum and Diamond Princess Cut Ring 1.11 Carat H IF New

Tiffany & Co. Platinum and Diamond Princess Cut Ring 1.11 Carat H IF New

By Tiffany & Co.

Located in Middletown, DE

For your consideration is a BRAND NEW Tiffany & Co Princess cut 1 carat natural diamond solitaire

Category

2010s American Engagement Rings

Materials

Diamond, White Diamond, Platinum

1ct VS Diamond, 14kt White Gold Band Ring
1ct VS Diamond, 14kt White Gold Band Ring

1ct VS Diamond, 14kt White Gold Band Ring

Located in New York, NY

1 carat of Tiffany quality diamonds set in 14 karat white gold. The diamonds are magnificent and it

Category

Late 20th Century Unknown More Rings

Materials

White Diamond, 14k Gold

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By Cartier

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By Peter Suchy

Located in Stamford, CT

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Category

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Materials

Diamond, Emerald, Platinum

Faberge Bi-Color Ribbed Gold Cigarette Case
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By Fabergé

Located in Capri, IT

1896 - 1908 Circa Yellow and Rose Gold Faberge Cigarette Case. Workmaster August Hollming, ST Petersburg with scratched inventory number 5695. Of rectangular shape.

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2ct Diamond engagement ring Designer ring 18KT yellow gold VS1 E
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Located in Boca Raton, FL

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Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany & Co. GIA Certified 1.32 Carat Round Brilliant Diamond Engagement Ring
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By Tiffany & Co.

Located in Scottsdale, AZ

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By Cartier

Located in Philadelphia, PA

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Azzedine Alaia Gold Lamé Couture Gown with Sequin Mosaic Detail, FW 1990

Azzedine Alaia Gold Lamé Couture Gown with Sequin Mosaic Detail, FW 1990

By Azzedine Alaïa

Located in London, GB

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Tiffany 1 Carat For Sale on 1stDibs

Find the exact tiffany 1 carat 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. Find an antique version now, or shop for 855 vintage or 1297 modern creation for a more contemporary example of these cherished accessories. You’re likely to find the perfect tiffany 1 carat among the distinctive items we have available, which includes versions made as long ago as the 19th Century as well as those produced as recently as the 21st Century. As it relates to this specific piece, our collection includes designs that are universally popular, but .5 Carat and 1 Carat carat weights, specifically, are sought with frequency. A tiffany 1 carat can make for a versatile accessory, but a selection from our variety of 1651 Diamond versions can add an especially stylish touch. See these pages for a round cut iteration of this accessory, while there are also cushion cut cut and princess cut cut versions available here, too. Most of our tiffany 1 carat for sale are for women, but there are 576 pieces available to browse for men.

How Much is a Tiffany 1 Carat?

Prices for a tiffany 1 carat can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $494 and can go as high as $3,200,000, while this accessory, on average, fetches $6,618.

Tiffany & Co. for sale on 1stDibs

Tiffany & Co. is one of the most prominent purveyors of luxury goods in the United States, and has long been an important arbiter of style in the design of diamond engagement rings. A young Franklin Delano Roosevelt proposed to his future wife, Eleanor, with a Tiffany ring in 1904. Vanderbilts, Whitneys, Astors and members of the Russian imperial family all wore Tiffany & Co. jewelry. And Jacqueline Kennedy Onassis preferred Tiffany china for state dinners at the White House.

Although synonymous with luxury today, the firm started out rather modestly. Charles Lewis Tiffany and John B. Young founded it in Connecticut as a “stationery and fancy goods emporium” in 1837, at a time when European imports still dominated the nascent American luxury market. In 1853, Charles Tiffany — who in 1845 had launched the company’s famed catalog, the Blue Book, and with it, the firm’s signature robin’s-egg blue, which he chose for the cover — shifted the focus to fine jewelry.

In 1868, Tiffany & Co. gained international recognition when it became the first U.S. firm to win an award for excellence in silverware at the Exposition Universelle in Paris. From then on, it belonged to the pantheon of American luxury brands.

At the start of the Gilded Age, in 1870, Tiffany & Co. opened its flagship store, described as a "palace of jewels" by the New York Times, at 15 Union Square West in Manhattan. Throughout this period, its designs for silver tableware, ceremonial silver, flatware and jewelry were highly sought-after indicators of status and taste. They also won the firm numerous accolades, including the grand prize for silverware at the Paris Exposition of 1878. Among the firm’s glittering creations from this time are masterworks of Art Nouveau jewelry, such as this delicate aquamarine necklace and this lavish plique-à-jour peridot and gold necklace, both circa 1900.

When Charles Lewis Tiffany died, in 1902, his son Louis Comfort Tiffany became the firm’s design director. Under his leadership, the Tiffany silver studio was a de facto design school for apprentice silversmiths, who worked alongside head artisan Edward C. Moore. The firm produced distinctive objects inspired by Japanese art and design, North American plants and flowers, and Native American patterns and crafts, adding aesthetic diversity to Tiffany & Co.’s distinguished repertoire.

Tiffany is also closely associated with diamonds, even lending its name to one particularly rare and exceptional yellow stone. The firm bought the Tiffany diamond in its raw state from the Kimberley mines of South Africa in 1878. Cut to create a 128.54-carat gem with an unprecedented 82 facets, it is one of the most spectacular examples of a yellow diamond in the world.

In a broader sense, Tiffany & Co. helped put diamonds on the map in 1886 by introducing the American marketplace to the solitaire diamond design, which is still among the most popular engagement-ring styles. The trademark Tiffany® Setting raises the stone above the band on six prongs, allowing its facets to catch the light. A lovely recent example is this circa-2000 platinum engagement ring. Displaying a different design and aesthetic (but equally chic) is this exquisite diamond and ruby ring from the 1930s.

Find Tiffany & Co. jewelry, serveware and decorative objects for sale 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.