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3 Carat Oval Cut Tanzanite & Diamond Ring
Located in Palm Desert, CA
Set in 14 karat yellow gold, weighing 3.72 grams, is one 3.00 carat Oval Cut Tanzanite with 40
Category

2010s Fashion Rings

Materials

Diamond, Tanzanite, 14k Gold, Yellow Gold

Tanzanite Ring 3 Carat 18K Yellow Gold
Located in Carlsbad, CA
Tanzanite = 3 Carat (Cut: Oval, Color: Blue, Origin: Natural) Metal = 18K Yellow Gold Ring Size = 7
Category

Late 20th Century Art Deco Cocktail Rings

Materials

Tanzanite, Gold, 18k Gold, Yellow Gold

3 Carat Tanzanite Band, 14 Karat White Gold Four-Stone Ring Oval Tanzanite Gem
By Five Star Jewelry
Located in Austin, TX
This stunningly beautiful four stone tanzanite ring would make anyone thrilled to receive it! The
Category

2010s American Contemporary Cluster Rings

Materials

Tanzanite, White Gold

4.47 Carat Oval Tanzanite 3 Stone 'Half Moon' Diamonds Engagement Ring
By Sebastian Bernard
Located in Los Angeles, CA
A beautiful color 4.47 Ct Oval shaped tanzanite set in the center of an 18K split 3 stone with two
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Tanzanite, 18k Gold

2, 08 carat Tanzanite 3, 13 carat Diamonds Fashion White Ring
Located in Marcianise, Marcianise (CE)
, ITEMS AT AUCTIONS AND ONGOING PROMOTIONS. Gorgeous ring in 14k white gold mounted with amazing
Category

Vintage 1980s Italian Retro Fashion Rings

Materials

White Diamond, Tanzanite, 14k Gold, White Gold

9.80 Carat Tanzanite Diamond 18k Yellow Gold 3-Stone Ring
Located in Beverly Hills, CA
A chic and classy 3-stone ring that will stand the test of time! It features a beautiful 9.80 carat
Category

21st Century and Contemporary North American Engagement Rings

Materials

Diamond, Tanzanite, 18k Gold, Yellow Gold

Cober "Dream of Tanzanite" 2.58 Carat Tanzanite 0.28 Carat total Diamonds Ring
By Vincent Cober
Located in OSS, NH
ring featuring a magnificent 2.58 carat tanzanite gemstone, surrounded by a total of 0.28 carat
Category

2010s Dutch Contemporary Cocktail Rings

Materials

Tanzanite, Diamond, Yellow Gold, 18k Gold

5.32 Carat Tanzanite and Diamond Cocktail Ring
Located in Greenville, DE
The Cocktail Ring is crafted in 18k white gold and features (1) oval Tanzanite weighing 5.32ct and
Category

2010s Cocktail Rings

Materials

Tanzanite, 18k Gold

28 Carat Tanzanite Diamond Platinum Ring
Located in Bal Harbour, FL
selection to cutting and setting, everything is first rate and it shows. 1 tanzanite 28.38cts 3 marquise
Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, Platinum

Le Vian 3 Carat Oval Tanzanite and Diamond Engagement Ring in 14K White Gold
By Le Vian
Located in Atlanta, GA
Item Details: This ring by Le Vian has a AAA quality tanzanite with accent diamonds. Circa: 2000s
Category

Early 2000s Modern Engagement Rings

Materials

Diamond, Tanzanite, White Gold, 14k Gold

2.98 Carat Tanzanite Diamond 14 Karat White Gold Ring
By DGI
Located in Los Angeles, CA
Elegant & Classic Tanzanite & Diamond Ring! This ring has a radiant bluish-purple Oval Cut
Category

2010s American Contemporary Cocktail Rings

Materials

Tanzanite, Diamond, White Gold, 14k Gold

2.01 Carat Tanzanite Diamond 14 Karat White Gold Ring
By DGI
Located in Los Angeles, CA
This ring has a purple Cushion Cut Natural Tanzanite weighing 1.48 Carats. The Tanzanite measures
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Tanzanite, 14k Gold, White Gold

4.57 Carat Tanzanite Diamond 14 Karat Rose Gold Ring
By DGI
Located in Los Angeles, CA
This ring has a radiant purple Oval Cut Natural Tanzanite weighing 3.95 Carats. The Tanzanite
Category

2010s American Contemporary Cocktail Rings

Materials

Tanzanite, Diamond, Rose Gold, 14k Gold

18 Karat Rose Gold and Tanzanite 3.94 Carat Ring
Located in Tucson, AZ
Tanzanite set in rose gold is one of our favorite things to do. This Tanzanite weighs 3.94 carats
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Tanzanite, 18k Gold, Rose Gold

30.15 Carat Tanzanite and Diamond 18 Karat White Gold Ring
Located in Montreux, VD
White gold ladies cast tanzanite and diamond ring with a bright polish finish. Identified with
Category

2010s Cocktail Rings

Materials

Diamond, Tanzanite, White Gold

18K WG 1 Carat Oval Cut Tanzanite Ring with 3/4 CTTW Diamonds with Appraisal
Located in Eagan, MN
This is just a beautiful ring! It is a pre-owned and does have some light scratches on the bottom
Category

2010s Unknown Art Nouveau Cocktail Rings

Materials

Tanzanite, Diamond, 18k Gold, White Gold

2.24 Carat Tanzanite Diamond 14 Karat White Gold Bridal Ring
By DGI
Located in Los Angeles, CA
This unique Tanzanite Diamond Ring has a stunning 1.89 Carat Marquise Cut Tanzanite as its center
Category

2010s American Contemporary Cocktail Rings

Materials

Tanzanite, Diamond, White Gold, 14k Gold

Cober multiple rings often worn together with 1.85 Carat Tanzanite Stacking Ring
By Vincent Cober
Located in OSS, NH
This is a yellow gold Tanzanite stacking ring. Stacking rings are multiple rings, often worn
Category

2010s Dutch Contemporary Fashion Rings

Materials

Tanzanite, Gold, Yellow Gold

1.50 Carat Tanzanite Diamond Yellow Gold Three-Stone Band Ring
Located in Stamford, CT
Tanzanite and diamond 12mm wide tapered band ring. 3 oval tanzanite stones with 8 round accent
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Tanzanite, Gold, 14k Gold, Yellow Gold

5.72 Carat Tanzanite and Diamond Yellow Gold Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
the interior of the ring. Tanzanite Quality Color Natural Cut Oval Mixed Content 5.72 carats Diamond
Category

Vintage 1980s Unknown Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold, Yellow Gold

18k White Gold 4.37 Carat Tanzanite and Diamond Ring
Located in Atlanta, GA
, Violet-Blue, Natural Tanzanite Diamond Details: .70ct, total weight. F Color, VS Clarity Band Width: 3 mm
Category

Early 2000s Unknown Contemporary Engagement Rings

Materials

Diamond, Tanzanite, White Gold

Le Vian 1.125 Carat Tanzanite Rose Gold Bridal Ring
By Le Vian
Located in Great Neck, NY
14k rose gold ring is a beautiful 1-1/8 carat cushion cut Tanzanite that appears to rest atop a
Category

2010s Bridal Rings

Materials

White Diamond, Brown Diamond, Tanzanite, 14k Gold, Rose Gold

Tanzanite 15.86 Carat Diamond 18 Karat Yellow Gold Ring
By Mousson Atelier
Located in Bangkok, TH
Tanzanite 15.86 carat Diamond 18 Karat Yellow Gold Ring Just take a look on this rich "blue velvet
Category

21st Century and Contemporary Thai Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, Yellow Gold

7.48 Carat Tanzanite and Pink Tourmaline 3-Stone Ring in Rose and Yellow Gold
By Sarosi By Timeless Gems
Located in Los Angeles, CA
classic, 3-stone ring is all about! It features an elongated cushion cut tanzanite in a beautiful, deep
Category

21st Century and Contemporary American Artisan Three-Stone Rings

Materials

Rubelite, Multi-gemstone, Tourmaline, Tanzanite, Gold, 18k Gold, Yellow ...

Cellini Jewelers 18KT Gold, 32.27 Carat Tanzanite Ring with 1.45 Carat Diamonds
By Cellini
Located in New York, NY
carats total. Tanzanite weight: 32.27 carats. Ring size 6-3/4 sizing options may be available Appraisal
Category

Early 2000s Italian Contemporary Engagement Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

14.64 Carat Tanzanite Diamond 18 Karat White Gold Ring
By Meghna Jewels
Located in Hoffman Estate, IL
carats tanzanite and illuminated with 3.0 carats of sparkling diamonds. The ring is a size 7 and may be
Category

21st Century and Contemporary Unknown Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Goshwara Blue Topaz & Tanzanite 3 Stone Emerald Cut with Diamonds Ring
By Goshwara
Located in New York, NY
A perfect combination of Blue Topaz and Tanzanite is this 3 Stone Emerald Cut Ring with Diamonds
Category

21st Century and Contemporary Indian Contemporary Cocktail Rings

Materials

Blue Topaz, Tanzanite, Diamond, Yellow Gold, 18k Gold

.75 Carat Pear Shaped Blue Tanzanite Bead Set Diamond Platinum Engagment Ring
Located in Stamford, CT
Pear shaped Blue tanzanite cocktail ring with Bead set rows of diamonds in a platinum setting. 1
Category

1990s Fashion Rings

Materials

Diamond, Tanzanite, Platinum

Captivating 1.82 total carat of Tanzanite and Natural Diamonds Ring
Located in רמת גן, IL
. This breathtaking creation features a dazzling 1.06 carat emerald-cut Tanzanite, its violetish-blue hue
Category

2010s Israeli Solitaire Rings

Materials

Diamond, Tanzanite, White Gold

2.27 Carat Pear Cut Tanzanite Diamond Cocktail Ring 18 Karat White Gold
By DGI
Located in Los Angeles, CA
This ring has a gorgeous Pear Cut Tanzanite that weighs 1.67 Carats. It is surrounded by 97 Round
Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, White Gold, 18k Gold

14 Karat Tanzanite Cocktail Ring
Located in New York, NY
Clarity & Grade: Included ►Tanzanite Weight: 1.12 carat ►Total Item Weight: 6.1 grams ►Item No: 608/3752
Category

21st Century and Contemporary Cocktail Rings

Materials

Tanzanite

1.15 Carat Tanzanite and Diamond 18 Karat White Gold Ring
Located in Bay Harbor Islands, FL
This elegant Tanzanite and diamond ring features an emerald cut Tanzanite weighing 1.15 carats and
Category

21st Century and Contemporary American Modern More Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Tanzanite & Diamond 14k Cocktail Ring
Located in New York, NY
This is a gorgeous tanzanite and diamond ring stamped in solid 14K white gold. The mesmerizing
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

14k Tanzanite & Diamond Cocktail Ring
Located in New York, NY
This is a gorgeous diamond ring stamped with tanzanite in solid 14K rose gold. The mesmerizing
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

1.15 Carat Tanzanite and Diamond 14 Karat White Gold Ring
Located in New York, NY
This beautiful three stone Tanzanite Ring is crafted in 14-karat White gold and features 3
Category

20th Century Chinese Art Deco Fashion Rings

Materials

Tanzanite, Diamond, White Gold, Gold, 14k Gold

2.25 ct Tanzanite & Diamond Ring
By Hakimi's Gem
Located in Chicago, IL
This stunning ring features a gorgeous oval-shaped tanzanite stone in a rich blue color, weighing
Category

2010s Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold

14k Diamond & Tanzanite Cocktail Ring
Located in New York, NY
& Grade: Included ►Tanzanite Weight: 3.16 carat ►Total Item Weight: 5.7 grams ►Item No: RTZ73 ►Style
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

Tanzanite 3.49 Carat Diamonds Enamel 18 Karat Yellow Gold Ring
By Mousson Atelier
Located in Bangkok, TH
Tanzanite 3.49 Carat Diamonds Enamel 18 Karat Yellow Gold Ring Our new collection "Melted Colors
Category

21st Century and Contemporary Thai Contemporary Cocktail Rings

Materials

Tanzanite, Diamond, Yellow Gold, Enamel, 18k Gold, Gold

16.75 Carat Sugarloaf Tanzanite Diamond Ring in 18 Karat White Gold
Located in Chicago, IL
0.40 carats. A slim, slightly rounded band amplifies this 3-stone past, present, and future style that
Category

2010s American Contemporary Fashion Rings

Materials

Diamond, Tanzanite, White Gold

Yellow Gold Tanzanite & Diamond Negative Space Band 14k Rnd .22ctw Ring Sz 5 3/4
Located in Greensboro, NC
Size: 5 3/4 Metal Content: 14k Yellow Gold Stone Information Natural Tanzanite Treatment
Category

21st Century and Contemporary Band Rings

Materials

Diamond, Tanzanite, 14k Gold, Yellow Gold

Dazzling 1.52 Tanzanite Engagement Ring
Located in רמת גן, IL
dazzling dance of colors and elegant design. A marquise-cut Tanzanite, 1.52 carats of pure violetish-blue
Category

2010s Singaporean Solitaire Rings

Materials

Diamond, Tanzanite, White Gold

7.71 Carat Tanzanite Mix Shape Three-Stone Ring 18k White Gold
By GEM PLAZA
Located in Jaipur, Rajasthan
Magnificent Tanzanite Mix Shape Tanzanite Three-Stone Ring 18K White Gold 3 Tanzanite - 7.71
Category

21st Century and Contemporary Indian Contemporary Bridal Rings

Materials

Tanzanite, 18k Gold, White Gold

0.62 Carat Oval Cut Tanzanite, Diamond and 14K Yellow Gold Ring
By Gad & Co.
Located in Miami, FL
Vintage Heirloom Centering a 0.62 Carat Tanzanite, accented by Round-Brilliant Cut Diamonds, and
Category

Late 20th Century Modern Cocktail Rings

Materials

Tanzanite, Yellow Gold, Gold, 14k Gold

Tanzanite 8.60 Carat Diamonds 18 Karat Yellow Gold Coral Reef Ring
By Mousson Atelier
Located in Bangkok, TH
Tanzanite 8.60 Carat Diamonds 18 Karat Yellow Gold Coral Reef Ring Ring from the Coral Reef
Category

21st Century and Contemporary Thai Romantic Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, Yellow Gold

1.39 Carat Tanzanite Gemstone Diamond Ring in 18k Solid White Gold
By VR Jewels
Located in Houston, TX
Tanzanite Diamond Engagement Ring in 18K Gold featuring natural tanzanite of 1.39 carats and
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Tanzanite, Diamond, White Gold, 18k Gold, Gold

14k Dazzling Diamond & Tanzanite Cocktail Ring
Located in New York, NY
This is an exquisite diamond and tanzanite ring stamped in 14K White Gold. Featuring round
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

14k Tanzanite and Diamond Cocktail Ring
Located in New York, NY
This is a gorgeous diamond ring with tanzanite stamped in solid 14K rose gold. The shinny round
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

14k Diamond & Tanzanite Spectacular Cocktail Ring
Located in New York, NY
This is a gorgeous diamond tanzanite ring stamped in solid 14K white gold. The mesmerizing round
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

14k Tanzanite & Diamond Mixture Elegant Ring
Located in New York, NY
This is a gorgeous tanzanite & diamond ring stamped in solid 14K white gold. The perfectly placed
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

Cocktail Tanzanite and Diamond 18k Ring
Located in New York, NY
This is a gorgeous tanzanite & diamond ring stamped in solid 18K white gold. The mesmerizing round
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

3.61 Carat Purple Blue Tanzanite and Diamond Engagement Ring Set in Platinum
Located in London, GB
A truly stunning oval tanzanite and diamond engagement ring set in platinum. The ring is centrally
Category

2010s British Modern Engagement Rings

Materials

Diamond, Tanzanite, Platinum

ALGT Certified 18 Carat White Gold Tanzanite Diamond Diana Cocktail Ring
Located in AMSTERDAM, NL
Offered in new condition, Diana Cocktail ring in white gold, with an oval cut tanzanite of 2.50 ct
Category

2010s European Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Vintage 2 Carat Cushion Cut Midnight Blue Tanzanite and Diamond 14K Gold Ring
Located in Addison, TX
. This ring can be sized up or down 3 sizes for no additional fee. If you wish to have a ring sized
Category

Late 20th Century Engagement Rings

Materials

Diamond, Tanzanite, Gold, 14k Gold, White Gold, Yellow Gold

Tanzanite 1.85 Carat Diamonds Enamel 18 Karat Yellow Gold Tweed Ring
By Mousson Atelier
Located in Bangkok, TH
Tanzanite 1.85 Carat Diamonds Enamel 18 Karat Yellow Gold Tweed Ring Perhaps this is the brightest
Category

21st Century and Contemporary Thai Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, Enamel, Yellow Gold, 18k Gold

Tanzanite 12.42 Carat Diamonds Sapphires 18 Karat White Gold Bubbles Ring
By Mousson Atelier
Located in Bangkok, TH
Tanzanite 12.42 Carat Diamonds Sapphires 18 Karat White Gold Bubbles Ring Incredibly light and airy
Category

21st Century and Contemporary Thai Contemporary Cocktail Rings

Materials

Pink Sapphire, Tanzanite, Diamond, Sapphire, 18k Gold, White Gold

14k Tanzanite Plus Diamond Cocktail Ring
Located in New York, NY
This gorgeous 14K white gold diamond and tanzanite ring is beautiful. the top of the ring is
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

14k Tanzanite and Diamond Cocktail Ring
Located in New York, NY
Clarity & Grade: Included/Near Colorless ►Tanzanite Weight: 2.34 carat ►Total Item Weight: 3.8 grams
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite

Tanzanite 19.82 Carat Diamonds Tsavorites 18 Karat Gold Oriental Magrib Ring
By Mousson Atelier
Located in Bangkok, TH
Tanzanite 19.82ct Diamonds Tsavorites 18 Karat White Gold Oriental Magrib Ring Pure Oriental, Pure
Category

21st Century and Contemporary Thai Contemporary Cocktail Rings

Materials

Tanzanite, Sapphire, Tsavorite, Diamond, Gold, 18k Gold

2.64 Carat Pear Shaped Tanzanite & Diamond Cocktail Ring in 14K Yellow Gold
Located in Chicago, IL
brightly polished 14k yellow gold cocktail anniversary ring features pear-shaped tanzanite that exhibits a
Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold, Yellow Gold

14k Diamond and Tanzanite Cocktail Ring
Located in New York, NY
This is a beautiful diamond ring stamped in solid 14K white gold and tanzanite gemstone . The
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold

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Tanzanite 3 Carat Ring For Sale on 1stDibs

Find the exact tanzanite 3 carat ring you’re shopping for in the variety available on 1stDibs. Frequently made of Gold, 18k Gold and White Gold, this item was constructed with great care. You can easily find a 167 antique edition and 1691 modern creations to choose from as well. Making the right choice when shopping for a tanzanite 3 carat ring 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. Finding an appealing tanzanite 3 carat ring — no matter the origin — is easy, but Sunita Nahata, Le Vian and Alberto each produced a popular version that is worth a look. While most can agree that any tanzanite 3 carat ring from our collection can easily elevate most outfits, but the choice of a Tanzanite version from the 1282 available is guaranteed to add a special touch to your ensemble. See these pages for an oval cut iteration of this accessory, while there are also cushion cut cut and round cut cut versions available here, too. Most of our tanzanite 3 carat ring for sale are for women, but there are 271 pieces available to browse for men.

How Much is a Tanzanite 3 Carat Ring?

Prices for a tanzanite 3 carat ring can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $200 and can go as high as $354,088, while this accessory, on average, fetches $4,496.

Finding the Right Rings for You

Antique and vintage rings have long held a special place in the hearts of fine jewelry lovers all over the world.

No matter their origin or specific characteristics, rings are timeless, versatile accessories. They’ve carried deep meaning since at least the Middle Ages, when diamond rings symbolized strength and other kinds of rings were worn to signify romantic feelings or to denote an affiliation with a religious order. Rings have also forever been emblematic of eternity.

Over time, rings have frequently taken the form of serpents, which have long been associated with eternal life, health and renewal. Italian luxury jewelry house Bulgari has become famous for its widely loved Serpenti motif, for example, and its Serpenti ring, like the other accessories in the collection, began as an homage to jewelry of the Roman and Hellenistic eras. The serpent is now a popular motif in fine jewelry. Jewelry devotees have long pined for rings adorned with reptiles, thanks to antique Victorian rings — well, specifically, Queen Victoria’s illustrious engagement ring, which took the form of a gold snake set with rubies, diamonds and an emerald (her birthstone). Designs for Victorian-era engagement rings often featured repoussé work and chasing, in which patterns are hammered into the metal.

Engagement rings, which are reliably intimidating to shop for, are still widely recognized as symbols of love and commitment. 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

The most collectible antique engagement rings and vintage engagement rings are those from the Victorian, Edwardian and Art Deco eras. Named for the monarchies of the four King Georges, who in succession ruled England starting in 1714 (plus King William’s reign), antique Georgian rings, be they engagement rings or otherwise, are also coveted by collectors. Pearls, along with colored gemstones like garnets, rubies and sapphires, were widely used in Georgian jewelry. The late-1700s paste jewelry was a predecessor to what we now call fashion or costume jewelry

The Art Nouveau movement (1880–1910) brought with it rings inspired by the natural world. Antique Art Nouveau rings might feature depictions of winged insects and fauna as well as women, who were simultaneously eroticized and romanticized, frequently with long flowing hair. Art Deco jewelry, on the other hand, which originated during the 1920s and ’30s, is by and large “white jewelry.” White metals, primarily platinum, were favored over yellow gold in the design of antique Art Deco rings and other accessories as well as geometric motifs, with women drawn to the era’s dazzling cocktail rings in particular.

Whether you’re hunting down a chunky classic for a Prohibition-themed cocktail party or seeking a clean contemporary design to complement your casual ensemble, find an exquisite collection of antique, new and vintage rings on 1stDibs.

Questions About Tanzanite 3 Carat Ring
  • 1stDibs ExpertJune 30, 2023
    Yes, tanzanite can be faked. Some stones that might be substituted for tanzanite include cubic zirconia, synthetic spinels and yttrium aluminum garnets. Replicas may also feature colored glass. A certified appraiser or experienced jeweler can help you determine the authenticity of a stone. On 1stDibs, shop an assortment of tanzanite jewelry.