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Tiffany & Co. 2.27 Carat Diamond Solitaire Engagement Ring
By Tiffany & Co.
Located in Bethesda, MD
laser inscribed with a number that corresponds to the Tiffany diamond certificate and Tiffany documents
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Platinum Ring
By Tiffany & Co.
Located in New York, NY
ring has a TIFFANY Diamond Certificate. A classic. Alice Kwartler has sold the finest antique gold
Category

Early 2000s American Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Lucida 0.93 Carat Diamond Platinum Ring
By Tiffany & Co.
Located in Tokyo, JP
with:Tiffany case, tiffany Diamond Certificate Weight:5.1g(Approx) Ring size:British & Australian:H 1/2 / US
Category

1990s American More Rings

Materials

Diamond, Platinum

Tiffany & Co. 0.32 Carat Diamond D-VS1 Platinum Dots Ring
By Tiffany & Co.
Located in Tokyo, JP
/ 0.16in(Approx) Main stone size:4.41-4.46×2.70mm Comes with:Tiffany Box, Case, Tiffany Diamond Certificate
Category

1990s American More Jewelry

Materials

Diamond, Platinum

Tiffany & Co Round Diamond 0.61cts I VS1 Solitaire Platinum Engagement Ring
By Tiffany & Co.
Located in San Diego, CA
/W12080820 Tiffany Diamond Certificate Metal: Platinum PT950 Size: 6 sizable TCW: 0.61 tcw Main Diamond
Category

2010s Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Lucida Diamond Engagement Ring Set in Platinum, H VVS2 0.30 Ct
By Tiffany & Co.
Located in Honolulu, HI
with a high polish finish. The ring comes with Tiffany diamond certificate, folder and inner and outer
Category

21st Century and Contemporary American Modern Wedding Rings

Materials

Diamond, Platinum

Tiffany & Co. Classic Diamond Solitaire Engagement Band-Ring Set
By Tiffany & Co.
Located in Bethesda, MD
is laser inscribed, matching the ring and the Tiffany diamond certificate. ♦ Designer: Tiffany ♦
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Ribbon Engagement Ring .82 Carat Center IVS1
By Tiffany & Co.
Located in Chicago, IL
0.82 CT, and 29 F/G-color, VS-clarity diamonds weighing 0.30 CT. It Includes a Tiffany Diamond
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Round 1.37 Carat Center Engagement Ring GVS1
By Tiffany & Co.
Located in Chicago, IL
Professionally Cleaned and Polished, comes with copies of original receipt, Tiffany diamond
Category

2010s Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Contemporary 2.02 CTW Diamond Platinum Harmony Engagement Ring
By Tiffany & Co.
Located in Philadelphia, PA
Measures north to south 8.0 mm and sits 5.5 mm high Total weight: 3.9 grams Tiffany Diamond Certificate
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

White Diamond, Platinum

Tiffany & Co. 5.35 CTW Emerald Cut Diamond Platinum Soleste Engagement Ring
By Tiffany & Co.
Located in Philadelphia, PA
Tiffany Diamond Certificate: 35672206 Accompanied by original box Stock Number: We-11346
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Engagement Ring in Platinum E VS2 1.29 CTW
By Tiffany & Co.
Located in New York, NY
;Valuation Report;Tiffany Diamond Certificate; Brand: Tiffany & Co. Metal Type: Platinum Metal Purity: 950
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum

Tiffany & Co. Diamond Solitaire Ring in Platinum H VS1 0.26 CTW
By Tiffany & Co.
Located in New York, NY
Tiffany Diamond Certificate. Brand: Tiffany & Co. Collection/Series: The Tiffany Setting Metal Type
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co. Contemporary 1.33 Carats Diamond Platinum Engagement Ring
By Tiffany & Co.
Located in Philadelphia, PA
Diamond Certification and original box. Stock Number: We-11147 This Tiffany & Co. Contemporary
Category

Early 2000s Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

Tiffany & Co. Diamond Engagement Ring in Platinum I VVS2 1.29 CTW
By Tiffany & Co.
Located in New York, NY
Certificate;Tiffany Diamond Certificate; Brand: Tiffany & Co. Collection/Series: Tiffany Setting Metal Type
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum

Tiffany & Co. Diamond Engagement Ring in Platinum I VVS2 1.38 CTW
By Tiffany & Co.
Located in New York, NY
. Comes with Pouch;Valuation Report;Tiffany Diamond Certificate; Brand: Tiffany & Co. Collection/Series
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Engagement Ring in Platinum F VS1 1.06 CTW
By Tiffany & Co.
Located in New York, NY
,Valuation Report, and Tiffany Diamond Certificate. Brand: Tiffany & Co. Metal Type: Platinum Metal Purity
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Engagement Ring in 950 Platinum G VS1 0.34 CTW
By Tiffany & Co.
Located in New York, NY
Diamond Certificate. Comes with papers. Brand: Tiffany & Co. Collection/Series: Tiffany Setting Metal Type
Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Solitaire Ring in 950 Platinum I VVS1 0.31 CTW
By Tiffany & Co.
Located in New York, NY
, Appraisal and Tiffany Diamond Certificate. Brand: Tiffany & Co. Metal Type: Platinum Metal Purity: 950 Ring
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Engagement Ring in Platinum H VS2 0.40 CTW
By Tiffany & Co.
Located in New York, NY
. Comes with Box;Tiffany Diamond Certificate; Brand: Tiffany & Co. Collection/Series: Tiffany Setting
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. 1.02 Ct. G, VVS2 Round Diamond Solitaire Platinum Ring
By Tiffany & Co.
Located in Honolulu, HI
, knife edge shank and has a high polish finish. The ring comes with Tiffany's Diamond Certificate
Category

21st Century and Contemporary American Modern Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co. Diamond Engagement Ring in 18k Pink Gold/Platinum F IF 0.3 CTW
By Tiffany & Co.
Located in New York, NY
. Comes with Box and Tiffany Diamond Certificate. Brand: Tiffany & Co. Metal Type: Pink Gold/Platinum
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum, Gold, Rose Gold

Tiffany & Co. Soleste Diamond Halo Pendant in 18k White Gold D VVS1 0.53CTW
By Tiffany & Co.
Located in New York, NY
length. Comes with Box;Valuation Report;Tiffany Diamond Certificate; Brand: Tiffany & Co. Collection
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, White Gold

Tiffany & Co. Halo Engagement Ring in Platinum G VVS2 1.66 CTW
By Tiffany & Co.
Located in New York, NY
Report;Tiffany Diamond Certificate;Original Receipt; Brand: Tiffany & Co. Metal Type: Platinum Metal
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Solitaire Diamond Engagement Ring in Platinum G VVS2 0.9 CTW
By Tiffany & Co.
Located in New York, NY
and recently polished. Ring size is 7.5. Comes with Box;Valuation Report;Tiffany Diamond Certificate
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum

Tiffany & Co. Diamond Solitaire Engagement Ring in Platinum I VS2 0.62 CTW
By Tiffany & Co.
Located in New York, NY
polished. Ring size is 4.75. Comes with Pouch;Valuation Report;Tiffany Diamond Certificate; Brand: Tiffany
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum

Tiffany & Co. Soleste Yellow Diamond Engagement Ring in 18k Gold & Platinum 1.98
By Tiffany & Co.
Located in New York, NY
. Ring size is 6. Comes with Tiffany Diamond Certificate; Brand: Tiffany & Co. Collection/Series
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Yellow Gold

Tiffany & Co. Harmony Engagement Ring in Platinum F VVS2 0.57 CTW
By Tiffany & Co.
Located in New York, NY
recently polished. Ring size is 5. Comes with Box;Valuation Report;Tiffany Diamond Certificate. Brand
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum

Tiffany & Co. Lucida Split Shank Diamond Engagement Ring, Platinum D VVS2 0.70Ct
By Tiffany & Co.
Located in New York, NY
;Valuation Report;Tiffany Diamond Certificate; Brand: Tiffany & Co. Collection/Series: Lucida Metal Type
Category

21st Century and Contemporary Engagement Rings

Materials

Platinum

Tiffany & Co Grace Princess Diamond 0.89 Tcw Engagement Ring Diamond Certificate
By Tiffany & Co.
Located in San Diego, CA
tcw Hallmark: ©TIFFANY&CO 28237081 .74CT Includes: T&C Diamond Certificate - Appraisal - Inner
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

TIFFANY & Co. Platinum .37ct Diamond Engagement Ring 5.5 with Certificate
By Tiffany & Co.
Located in Los Angeles, CA
TIFFANY & Co. Platinum .37ct Diamond Engagement Ring 5.5 Metal: Platinum Size: 5.5 Diamond: Round
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Platinum .56ct Diamond Engagement Ring 5.25 with Certificate
By Tiffany & Co.
Located in Los Angeles, CA
TIFFANY & Co. Platinum .56ct Diamond Engagement Ring 5.25 Metal: Platinum Size: 5.25 Diamond
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Platinum Solitaire Emerald Cut Diamond Ring with Certification
By Tiffany & Co.
Located in FORTITUDE VALLEY, QLD
papers as well as ring box. This ring has a diamond grade certification from Tiffany. Finger Size: L
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co .64ct Diamond Engagement Ring Setting Platinum Estate Certificate 5
By Tiffany & Co.
Located in Torrance, CA
brightly. The ring is accompanied by a Tiffany & Co diamond certificate. The ring is in very good
Category

Mid-20th Century Unknown Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

TIFFANY & Co. Platinum .36ct Diamond Harmony Engagement Ring 6 with Certificate
By Tiffany & Co.
Located in Los Angeles, CA
TIFFANY & Co. Harmony Platinum .36ct Diamond Engagement Ring 6 Metal: Platinum Size: 6 Weight
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Platinum .37 Carat Diamond Engagement Ring 5.5 with Certificate
By Tiffany & Co.
Located in Los Angeles, CA
TIFFANY & Co. Platinum .37ct Diamond Engagement Ring 5.5 Metal: Platinum Size: 5.5 Diamond: Round
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Princess-Cut Diamond Engagement Ring in Platinum with Certificate
By Tiffany & Co.
Located in Miami, FL
Brand: Tiffany & Co. Metal: Platinum Metal Purity: 950 Stones: 1 Princess Cut Diamond Ring Total
Category

2010s Wedding Rings

Materials

Diamond, Platinum

Beautiful Platinum Ring with 0.74 ct Natural Diamonds- Tiffany & Co. Certificate
By Tiffany & Co.
Located in רמת גן, IL
ring comes with a Tiffany & Co. certificate for its main stone. -1 diamond main stone of 0.74 ct. cut
Category

2010s Israeli Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co. Rose Gold Tiffany T Diamond Bracelet
By Tiffany & Co.
Located in London, GB
A delicate 18k rose gold diamond bracelet by Tiffany & Co. from the Tiffany T collection. The
Category

21st Century and Contemporary American Modern Bracelets

Materials

Diamond, 18k Gold, Rose Gold

Tiffany & Co. Brilliant Cut 0.19ct Diamond Platinum Tiffany Setting Ring
By Tiffany & Co.
Located in Bishop's Stortford, Hertfordshire
- Tiffany & Co. Certificate Material(s)- Platinum Gemstone- Diamond UK Ring Size- J EU Ring Size- 49 US Ring
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Brilliant Cut 0.8ct Diamond Platinum Tiffany Setting Ring
By Tiffany & Co.
Located in Bishop's Stortford, Hertfordshire
Tiffany & Co. Brilliant Cut 0.8ct Diamond Platinum Tiffany Setting Ring Brand- Tiffany & Co. Model
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Brilliant Cut 1.73ct Diamond Platinum Tiffany Setting Ring
By Tiffany & Co.
Located in Bishop's Stortford, Hertfordshire
Tiffany & Co. Brilliant Cut 1.73ct Diamond Platinum Tiffany Setting Ring Brand Tiffany & Co. Model
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Platinum Diamond Ring
By Tiffany & Co.
Located in North Miami Beach, FL
Tiffany & Co. Platinum Diamond Ring Square Diamond 1.03ct GIA Certificate Color E Clarity VS2 Size
Category

2010s American Modern Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co Diamond Engagement Ring 0.52ct
By Tiffany & Co.
Located in SYDNEY, NSW
accompanied by Valuation Document Number AV 00006411 dated 19/03/2024 and Tiffany & Co Diamond Certificate
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co Diamond Hinged Bangle 0.10ct
By Tiffany & Co.
Located in SYDNEY, NSW
A Tiffany & Co. Diamond bangle, made of 18ct White Gold, and weighing 38.7 gm. Stamped: Tiffany
Category

21st Century and Contemporary Bangles

Materials

Diamond, White Gold

Tiffany & Co. Diamond Platinum Engagement Ring
By Tiffany & Co.
Located in New York, NY
secured by 6 prongs. The central diamond is accompanied by a leather bound Tiffany certificate stating the
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Solitaire 0.62ct Diamond Pendant
By Tiffany & Co.
Located in Bishop's Stortford, Hertfordshire
This pendant by Tiffany & Co. features a 0.62ct round brilliant cut diamond. Accompanied by a
Category

21st Century and Contemporary Unknown Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Tiffany & Co. Platinum Diamond Circlet Pendant
By Tiffany & Co.
Located in London, GB
A charming platinum diamond pendant by Tiffany & Co from the Circlet collection. The pendant is
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, Platinum

Tiffany & Co. Platinum Diamond Drop Earrings
By Tiffany & Co.
Located in London, GB
A stunning pair of platinum diamond drop earrings by Tiffany & Co. The earrings are set with round
Category

21st Century and Contemporary Dangle Earrings

Materials

Diamond, Platinum

Tiffany & Co. Platinum Diamond Heart Pendant
By Tiffany & Co.
Located in London, GB
A lovely platinum diamond heart pendant by Tiffany & Co. The pendant features an open heart motif
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, Platinum

Tiffany & Co. Platinum Diamond Heart Pendant
Tiffany & Co. Platinum Diamond Heart Pendant
Free Shipping
W 3.35 in L 4.73 in
Tiffany & Co. Diamond Solitaire Engagement Ring
By Tiffany & Co.
Located in London, GB
A classic engagement ring from Tiffany & Co. It centres a round brilliant diamond which weighs 0.45
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Certified Vintage Tiffany & Co. 'Tiffany True' Yellow Cushion Cut Diamond Ring
By Tiffany & Co.
Located in London, GB
with the yellow gold setting. The diamond is accompanied by a Tiffany & Co. certificate and has a
Category

2010s Modern Solitaire Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Tiffany & Co engagement diamond ring platinum
By Tiffany & Co.
Located in Jupiter, FL
Tiffany & Co tanzanite and diamond ring in platinum, exquisite craftsmanship by a wonderful
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Tanzanite, Platinum

1.03 Carat Emerald Cut Diamond Tiffany & Co. Charles Tiffany Platinum Men's Ring
By Tiffany & Co.
Located in Chevy Chase, MD
Tiffany & Co. Diamond certificate number 73955831. It is graded as H color, VS1 clarity, with excellent
Category

21st Century and Contemporary American Modern Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co ladies platinum diamond halo ring
By Tiffany & Co.
Located in Braintree, GB
Tiffany & Co ladies platinum diamond halo ring. Maker: Tiffany & Co. Fully hallmarked. Comes in
Category

21st Century and Contemporary American Fashion Rings

Materials

Diamond, Platinum

Tiffany & Co. 0.28 Carat Diamond Harmony Ring
By Tiffany & Co.
Located in London, GB
: ‘Tiffany & Co.’ ‘PT950’ ‘DO.28’ & Serial Number Documents: Tiffany & Co. Diamond Certificate (paper copy
Category

21st Century and Contemporary Solitaire Rings

Materials

Diamond, Platinum

Tiffany & Co. 1.58 Diamond Platinum Novo Ring
By Tiffany & Co.
Located in Tokyo, JP
Brand:TIFFANY&Co. Name:Novo Ring Material:1P diamond (1.58ct I-VS1), side diamond, Pt950 platinum
Category

2010s French More Jewelry

Materials

Diamond, Platinum

Tiffany & Co Tiffany Setting Round Diamond 2.08 Cts F VVS2 Engagement Ring Plat
By Tiffany & Co.
Located in San Diego, CA
Tiffany & Co. Tiffany Setting Solitaire Engagement Ring Style: Solitaire 6-Prong Certification
Category

1990s Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Classic Diamond Solitaire Engagement Ring
By Tiffany & Co.
Located in London, GB
This Tiffany & Co engagement is a high popular design. The diamond in the centre weighs 0.40 carat
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. Platinum Diamond Circlet Stud Earrings
By Tiffany & Co.
Located in London, GB
A beautiful pair of platinum diamond earrings by Tiffany & Co. from the Circlet collection. Each
Category

21st Century and Contemporary American Stud Earrings

Materials

Diamond, Platinum

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Tiffany Diamond Certificate For Sale on 1stDibs

Surely you’ll find the exact tiffany diamond certificate you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Each design created in this style — which was crafted with great care and often made from platinum, gold and 18k gold — can elevate any look. Our collection of these items for sale includes 321 vintage editions and 1101 modern creations to choose from as well. You’re likely to find the perfect tiffany diamond certificate among the distinctive items we have available, which includes versions made as long ago as the 18th Century as well as those produced as recently as the 21st Century. 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. If you’re browsing our inventory for a tiffany diamond certificate, 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 Tiffany Diamond Certificate?

On average, a tiffany diamond certificate at 1stDibs sells for $8,833, while they’re typically $222 on the low end and $875,000 for the highest priced versions of this item.

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. jewels. 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.

Questions About Tiffany & Co.
  • 1stDibs ExpertAugust 17, 2021
    A Tiffany & Co. engagement ring can cost as little as $13,000 or as much as $500,000 depending on the center stone’s carat weight, the band material and whether or not there are any side stones. The smaller the stone, the cheaper the ring will be. Find engagement rings designed by Tiffany & Co. on 1stDibs.