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Certified Tanzanite Rings

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Flash Sale-14 karat Gold -Certified Tanzanite Ring with Diamonds
Located in MADRID, ES
Size:15 Gemstone Details: - One natural oval-cut Tanzanite. - Weight: 1.62 ct. - Measurements: 8.4
Category

21st Century and Contemporary European Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, Gold, 14k Gold

GIA Certified Natural Tanzanite Ring with Diamonds in White Gold
By ANGARA INC.
Located in Los Angeles, CA
GIA Certified Tanzanite Ring with Round & Marquise Diamonds
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Gold

GIA Certified Natural Tanzanite Ring with Diamonds in White & Yellow Gold
By ANGARA INC.
Located in Los Angeles, CA
GIA Certified Tanzanite Ring with Round & Marquise Diamonds
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Gold, Yellow Gold

Angara GIA Certified Natural Tanzanite Ring with Diamonds in White Gold
By ANGARA INC.
Located in Los Angeles, CA
GIA Certified Tanzanite Ring with Round & Marquise Diamonds
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Gold

Angara GIA Certified Natural Tanzanite Ring with Diamonds in White & Rose Gold
By ANGARA INC.
Located in Los Angeles, CA
GIA Certified Tanzanite Ring with Round & Marquise Diamonds
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Gold, Rose Gold

ANGARA GIA Certified Natural Tanzanite Ring with Diamonds in White & Yellow Gold
By ANGARA INC.
Located in Los Angeles, CA
GIA Certified Tanzanite Ring with Round & Marquise Diamonds
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Gold, Yellow Gold

ANGARA GIA Certified Natural Tanzanite Ring with Diamonds in White & Rose Gold
By ANGARA INC.
Located in Los Angeles, CA
GIA Certified Tanzanite Ring with Round & Marquise Diamonds
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Gold, Rose Gold

7.31ct heart-shaped Tanzanite ring. GIA certified.
Located in Los Angeles, CA
18K white with rose gold ring, featuring a 7.31-carat, heart-shaped Tanzanite, accented by 66 round
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

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

GIA Certified 34.72 CT Tanzanite Diamond Gold Ring
Located in Westport, CT
An extraordinary handmade 14K pink/rose gold ring mounted with a stunning 34.72 CT, GIA certified
Category

Mid-20th Century Artisan Cocktail Rings

Materials

Diamond, Tanzanite, Gold

Certified 10.53 Carat Emerald and Tanzanite Cocktail Ring
By Royaal Stones Ltd
Located in Bangkok, Thailand
pear shaped Tanzanites surrounding it. The ring has 0.97 carats white diamonds, and is made in solid
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Emerald, Tanzanite, 18k Gold

IGE Certified 1.9 Carat Tanzanite Diamonds Cocktail Ring
Located in MADRID, ES
Seize the opportunity to own the stunning Tanzanite, possibly boasting the most beautiful blue hue
Category

21st Century and Contemporary European Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold

Certified 19.98ct Tanzanite and Diamond 18ct gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one oval cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 3.44ct Tanzanite and Diamond 18ct gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This Ring Designed by David Jerome is from his Private Collection and features One Oval Cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

IGI Certified 7.80 Carat Tanzanite Diamonds Gold Ring
Located in Marcianise, Marcianise (CE)
, ITEMS AT AUCTIONS ,ONGOING PROMOTIONS AND ITEMS ON SALES. Shiny ring in 14kt white gold mounted with a
Category

Late 20th Century Italian Retro More Rings

Materials

Diamond, Tanzanite, 14k Gold, White Gold

Certified Art Deco Rock Crystal Cocktail and Tanzanite Ring
By Royaal Stones Ltd
Located in Bangkok, Thailand
A art-deco looking, 3.2 carat octagon shape Tanzanite ring with 0.36 carat Diamond and Rock Crystal
Category

2010s Band Rings

Materials

Crystal, Rock Crystal, Tanzanite, 18k Gold

10 Carats Trilliant Cut Tanzanite Ring Certified B AAA
Located in New York, NY
Center Stone Blue Tanzanite Ring: Carat Weight: 9.06 Carats Color: Blue Tanzanite Clarity: AAA
Category

2010s American Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold, White Gold

Natural Tanzanite Diamond Ring 6.5 14k WG 2.05 TCW Certified
Located in Brooklyn, NY
Natural Tanzanite Diamond Ring 6.5 14k WG 2.05 TCW Certified $3,950 310590 Nothing says, “I Love
Category

2010s American Engagement Rings

Materials

Diamond, Tanzanite

Tanzanite Diamond Ring 14k White Gold 2.65 TCW Certified
Located in Brooklyn, NY
Tanzanite Diamond Ring Size 5.5 14 kt 2.65 tcw Certified $3,950 013305 This is a One of a Kind
Category

2010s American Engagement Rings

Materials

Diamond, Tanzanite, 14k Gold, White Gold

Tanzanite Diamond Ring 14k White Gold 5.30 TCW Certified
Located in Brooklyn, NY
Tanzanite Diamond Ring 14 kt 5.30 tcw Certified $6,950 013306 This is a One of a Kind Unique
Category

2010s American Engagement Rings

Materials

Diamond, Tanzanite, White Gold, 14k Gold

Natural Tanzanite Diamond Ring 14k Gold 5.08 TCW 5.52g Certified
Located in Brooklyn, NY
Natural Tanzanite Diamond Ring 14k Gold 5.08 TCW 5.52g Certified $5,950 215423 Nothing says, “I
Category

2010s American Engagement Rings

Materials

Diamond, Tanzanite, 14k Gold

GIA Certified 7.22 Carat Tanzanite Diamond Platinum Engagement Ring
Located in Stamford, CT
Blue violet 7.22 carat oval tanzanite and diamond engagement ring. GIA certified oval center stone
Category

21st Century and Contemporary Engagement Rings

Materials

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

Tiffany & Company Vintage 2.08 Carat Tanzanite Platinum Ring AGL Certified
By Tiffany & Co.
Located in Mount Kisco, NY
rectangular emerald cut AAAA tanzanite gemstone is certified by American Gemological Laboratories (AGL) with a
Category

Vintage 1950s American Solitaire Rings

Materials

Tanzanite, Platinum

Certified 4.33ct 18ct White gold Tanzanite and Diamond Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one oval cut
Category

21st Century and Contemporary British Contemporary Cocktail Rings

Materials

Tanzanite, Diamond, 18k Gold, White Gold

David Jerome Certified 4.23ct Oval Cut Tanzanite and Diamond Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring is from the private collection of gemstone jewellery individually designed by David
Category

21st Century and Contemporary British Contemporary Engagement Rings

Materials

Diamond, Tanzanite

David Jerome Certified 2.58ct Oval Cut Tanzanite and Diamond Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring is from the private collection of gemstone jewellery individually designed by David
Category

21st Century and Contemporary British Contemporary Engagement Rings

Materials

Diamond, Tanzanite, White Gold

Certified Natural Pear Shaped Cabochon Tanzanite Ring with VVS Diamond
By Royaal Stones Ltd
Located in Bangkok, Thailand
The vibrant, transparent blue-violet Tanzanite exudes an enchanting allure, while the sparkling
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Natural Tanzanite Diamond Ring 14k Gold 4.54 TCW GIA Certified
Located in Brooklyn, NY
Natural Finely Faceted Quality Tanzanite Diamond Ring 14k Gold 4.54 TCW Size 5.75 GIA Certified
Category

2010s American Engagement Rings

Materials

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

GIA Certified 26.37 Carat Oval Tanzanite Cabochon Diamond Cocktail Ring
By M&V Vanguard Jewelry
Located in New York, NY
GIA Certified 26.37 Carat Oval Tanzanite Cabochon Diamond Cocktail Ring Crafted in 18K White Gold
Category

2010s American Baroque Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, Platinum

IGI Certified Tanzanite 15.45ct Diamonds Ring 18k White Gold Quality AAAA
Located in München, DE
Ring with tanzanite 15.45 Carat, emerald cut, color: deep violetish blue, clarity: transparent. The
Category

2010s Italian Cocktail Rings

Materials

Diamond, Tanzanite, White Gold

18.13ct GIA certified, oval Tanzanite ring in 18K rose gold.
Located in Los Angeles, CA
18K white with rose gold ring, featuring an extravagant 18.13-carat, Tanzanite accented by 44 round
Category

21st Century and Contemporary North American Modern Fashion Rings

Materials

Diamond, Tanzanite, 18k Gold, Rose Gold

GIA certified Tanzanite, Diamond, Sapphire and Emerald Cocktail Ring
By Rosior
Located in Porto, PT
Rosior One-off Cocktail Ring set in Yellow Gold with: - 1 oval cut, GIA certified, tanzanite
Category

21st Century and Contemporary Portuguese Contemporary Cocktail Rings

Materials

Tanzanite, Purple Sapphire, Diamond, White Diamond, Yellow Diamond, Emer...

Genuine Certified Tanzanite Diamond Ring-Exquisite Jewelry for Everyday Elegance
Located in MADRID, ES
Discover the allure of Tanzanite, renowned for its breathtaking blue hue, rivaling even the finest
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

Diamond, Tanzanite, 14k Gold, Yellow Gold

Natural Tanzanite Diamond Ring Size 14k W Gold 3.89 TCW Certified
Located in Brooklyn, NY
Natural Tanzanite Diamond Ring Size 6.5 14k W Gold 3.89 TCW Certified $4,790 217841 Nothing says
Category

2010s American Engagement Rings

Materials

Diamond, Tanzanite, Gold

Natural Tanzanite Diamond Ring 6.5 14k W Gold 2.61 TCW Certified
Located in Brooklyn, NY
Natural Tanzanite Diamond Ring 6.5 14k W Gold 2.61 TCW Certified $4,950 217842 Nothing says, “I
Category

2010s American Engagement Rings

Materials

Diamond, Tanzanite, Gold

Certified 2.7ct Pear Cut Tanzanite and Diamond 18ct gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one pear cut
Category

2010s British Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

GIA Certified 1.57 Carat Oval Tanzanite Diamond Gold Engagement Ring
Located in Stamford, CT
Tanzanite and Diamond halo engagement ring. Oval shaped violet blue Tanzanite set in 14k yellow
Category

21st Century and Contemporary Engagement Rings

Materials

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

Certified 3.31ct Trillion cut Tanzanite and Diamond 18k gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one trilliant cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 5.6ct Cushion Cut Tanzanite and Diamond 18ct gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one cushion cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Tanzanite, Diamond, 18k Gold, White Gold

Certified 14.35ct Oval Cut Tanzanite and Diamond 18ct Gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one oval cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 3.71ct Oval Cut Tanzanite and Diamond 18ct gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one oval cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 3.1ct Cushion Cut Tanzanite and Diamond 18ct Gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one cushion cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 2.82ct Triangular cut Tanzanite and Diamond 18ct gold ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one trilliant cut
Category

21st Century and Contemporary British Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, Yellow Gold

Certified 2.87ct Oval Cut Tanzanite and Diamond 18ct gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one oval cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 15.2ct Cushion Cut Tanzanite and Diamond 18ct gold Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one cushion cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

GIA Certified 15.88 Carat Natural Diamond & Tanzanite Gem Platinum Cocktail Ring
Located in Los Angeles, CA
A Magnificent Modern Platinum Cocktail Ring set with a GIA Certified 13.82 Carat Natural Violet
Category

2010s American Modern Engagement Rings

Materials

Diamond, Tanzanite, Platinum

Genuine 1.46 Carat Tanzanite and Diamonds-Certified Cocktail Ring for woman
Located in MADRID, ES
Exquisite Certified Cocktail Ring-Genuine Tanzanite and Diamonds for Women
Category

21st Century and Contemporary European Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold

EGL Certified 4.09 Carat Tanzanite & Diamond Ring in 18K White Gold
Located in KOWLOON, HK
Tanzanite adds uniqueness to this ring, allowing for maximum light reflection and enhancing its brilliance
Category

2010s Hong Kong Modern Band Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 15.44ct Heart Cut Tanzanite and 18k gold Diamond Ring
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one heart cut
Category

21st Century and Contemporary British Contemporary Cluster Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Certified 3.96ct Oval Cut Tanzanite and Diamond 18ct gold RIng
By David Jerome
Located in Bishop's Stortford, Hertfordshire
This ring designed by David Jerome is from his private collection and features one oval cut
Category

21st Century and Contemporary British Art Deco Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

IGI Certified 3.76 Carat Tanzanite & Diamond Ring in 18K White Gold
Located in KOWLOON, HK
magnificent IGI Certified 3.76 Carat tanzanite in a vivid bluish-violet hue, expertly cut into an alluring
Category

2010s Hong Kong Modern Band Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

IGI Certified 2.76 Carat Tanzanite & Diamond Ring in 18K White Gold
Located in KOWLOON, HK
IGI Certified 2.76 Carat tanzanite in a vivid bluish-violet color, expertly crafted in an oval shape
Category

2010s Hong Kong Modern Band Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

Tanzanite and Diamond Ring
By Diamond Scene New York
Located in New York, NY
A SUBLIME tanzanite! 14.89 carat GIA certified Oval Tanzanite 1.10 carats of side diamonds
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tanzanite, Platinum

Certified 16.62 Carat Emerald Cabochon and Tanzanite and Diamond Cocktail Ring
By Royaal Stones Ltd
Located in Bangkok, Thailand
A beautiful combination of 16.62 carat oval Emerald Cabochon, 5.19 carat pear shape Tanzanite and
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

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

GIA Certified 22.43 Carat Tanzanite Diamond 18 Karat White Gold Ring
Located in Territet, CH
White Gold Ladies Ring with a bright polish finish. Condition is new. Containing: One prong set
Category

2010s Cocktail Rings

Materials

Diamond, Tanzanite, 14k Gold, White Gold

IGI Certified Tanzanite Yellow Sapphire Diamond Ring in 14K Yellow Gold
Located in Hong Kong, HK
This ring is a stunning piece that centers around a mesmerizing tanzanite, weighing in at 4.26
Category

2010s Hong Kong Modern Cocktail Rings

Materials

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

Certified 1.36 Carat Tanzanite with Diamond Engagement Ring - 14k Yellow Gold
Located in MADRID, ES
Exquisite Tanzanite Women's Ring - 14k Gold, Emerald-Cut Tanzanite, Adorned with Diamonds. A unique
Category

21st Century and Contemporary Spanish Classical Roman Engagement Rings

Materials

Diamond, Tanzanite, 14k Gold, Yellow Gold

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

9.23ct Tanzanite & 0.23ct Diamond Ring-Pear Shape-18KT Gold-GIA Certified-Rare
Located in London, GB
Tanzanite & Diamond Ring Shape: Pear Gem Weight: 9.23 Diamond Weight: 0.23 Gold: 18K White
Category

2010s African Cocktail Rings

Materials

Diamond, Tanzanite, 18k Gold

GIA Certified 43.23 Carat Tanzanite and Diamond 18 Karat White Gold Ring
Located in Territet, CH
White gold ladies cast tanzanite and diamond ring with a bright polish finish. The featured
Category

2010s Cocktail Rings

Materials

Tanzanite, Diamond, White Gold

Natural Tanzanite Diamond Ring Size 6.5 14k White Gold 3.99 TCW Certified
Located in Brooklyn, NY
Natural Tanzanite Diamond Ring Size 6.5 14k White Gold 3.99 TCW Certified $5, 975 216192 Nothing
Category

2010s American Engagement Rings

Materials

Diamond, Tanzanite, White Gold

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Certified Tanzanite Rings For Sale on 1stDibs

Browse a vast assortment of certified tanzanite rings for sale on 1stDibs. These distinct designs — crafted with great care and often made from Gold, 18k Gold and White Gold — can elevate any look. Find a collection of 8 vintage versions or 71 modern creations for a more contemporary example of these cherished accessories. Our collection, which features older pieces for sale from the 20th Century and newer versions made as recently as the 21st Century, has proven very popular over the years. The designs in our inventory of certified tanzanite rings bearing Contemporary or Modern hallmarks are very popular. Versions of these items have been a part of the life’s work for many jewelers, but those produced by David Jerome, FERRUCCI and Royaal Stones Ltd are consistently popular. Today, if you’re looking for oval cut certified tanzanite rings and are unable to find the perfect match, our selection also includes cushion cut and emerald cut alternatives. There aren’t many items for men in our collection of certified tanzanite rings, as most of the options available are for women.

How Much are Certified Tanzanite Rings?

Prices for certified tanzanite rings start at $1,299 and top out at $301,274 with these rings, on average, selling for $9,600.

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 Certified Tanzanite Rings
  • 1stDibs ExpertAugust 17, 2021
    In the United States, diamond rings are certified by an official gemological laboratory known as the Gemological Institute of America. A certified diamond ring means that the diamond has undergone a quality analysis by experts at an institution such as the GIA and these experts have issued a lab report that is indicative of the grading process.
  • 1stDibs ExpertFebruary 22, 2021
    Vera Wang engagement rings are certified by an official gemological laboratory, and they have a certificate. A certified engagement ring means that the diamond has undergone a quality analysis.