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Gia Certified Cushion Diamond Ring

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5.01ct Fancy Brownish Yellow GIA Certified Cushion Diamond Ring with Bullet Dia
Located in New York, NY
ring showcases a GIA certified cushion cut diamond in the center, flanked by two perfectly matched
Category

2010s American Modern Three-Stone Rings

Materials

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

GIA Certified Natural Fancy Intense Green 3.09 Carat SI1 Cushion Cut Diamond
By GIA
Located in Tustin, CA
3.09ct SI1 Cushion Cut Diamond. This beautiful diamond measures in at 3.09ct and has been certified by
Category

2010s Modern Engagement Rings

Materials

Diamond

Rare Cushion Cut GIA Certified Vivid Yellow and White Diamond Platinum Ring
By Diamond Scene
Located in New York, NY
1.54 carat GIA Certified vivid yellow VS2 cushion cut center diamond. The center diamond is set
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Yellow Diamond, Platinum

Rare 5 Carat Cushion Brilliant Cut GIA Certified Engagement Ring
By Diamond Scene
Located in New York, NY
Brilliant cut GIA certified H color VS1 clarity diamond. A unique cut, this cushion brilliant is full of
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond

GIA Certified Purplish Pink Cushion Sapphire Diamond Halo Ring Sri Lanka 3.56 CT
By Harbor Diamonds
Located in New York, NY
GIA Certified Purplish Pink Cushion cut Sapphire weighing 2.96 Carats flanked with round brilliants
Category

2010s Contemporary Engagement Rings

Materials

Diamond, Sapphire, Platinum

GIA Certified 2.69 Carat Cushion Cut Grey-Blue Sapphire and Diamond Ring ref1300
By Diamond Town
Located in New York, NY
Featuring a GIA Certified 2.69 carat cushion-cut Gray-Blue sapphire at its center, elegantly
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Sapphire, 18k Gold, White Gold

GIA Certified 2.60 Carat Cushion Cut Blue Sapphire and Diamond Halo Ring ref471
By Diamond Town
Located in New York, NY
This mesmerizing ring, features a stunning GIA Certified 2.60 carat cushion-cut vivid blue Sapphire
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

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

1.22ct GIA Certified 14K Rose Gold Cushion Cut SI1 Engagement Halo Diamond Ring
By Diamonds Mine
Located in Aventura, FL
A beautiful handmade engagement ring, The center diamond of this ring is 1.22CT, SI1 Clarity and I
Category

2010s American Art Deco Engagement Rings

Materials

Diamond, Gold, 14k Gold, Rose Gold

GIA Certified 1.72 Carat Cushion Cut Natural Diamond Ring in 18 Karat Gold ref94
By Diamond Town
Located in New York, NY
This exquisite, handcrafted ring boasts a 1.72 carat GIA certified cushion-cut center diamond, with
Category

21st Century and Contemporary Contemporary Bridal Rings

Materials

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

GIA Certified 0.79 Carat H VS1 Cushion Cut Diamond Platinum Solitaire Ring
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Solitaire Engagement Ring. The ring is Platinum 950. The Diamond is Cushion Cut, GIA Certified
Category

21st Century and Contemporary American Contemporary Solitaire Rings

Materials

Diamond, White Diamond, Platinum

5 Carat Green Emerald Cushion Cut Diamond Halo Ring GIA Certified No Oil
By Diamond Scene New York
Located in New York, NY
diamonds. A cushion cut green emerald is a rare find. The ring is currently a size 6 but can be adjusted
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Emerald

GIA Certified 3.04 Carat G VVS2 Cushion Cut Diamond Gold Engagement Ring
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Diamond is GIA Certified The setting has Small Round Diamonds 1.22ct G SI The ring is a size 7, sizable
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

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

GIA Certified 1.70 Carat G VS1 Cushion Diamond Solitaire Gold Engagement Ring
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Solitaire Engagement Ring The ring is 18K White Gold The center Is Cushion Cut Stone, GIA Certified
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

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

GIA Certified 5.54 Carat Cushion Sapphire Three Stone Ring in Platinum
By Diamond Town
Located in New York, NY
This expertly crafted ring features a GIA Certified 5.54ct Luscious/Vibrant Blue Sri Lankan
Category

21st Century and Contemporary Modern Three-Stone Rings

Materials

Diamond, Sapphire, Platinum

Vivid Diamonds GIA Certified 1.77 Carat Diamond Halo Engagement Ring
By Vivid Diamonds
Located in Miami, FL
elongated GIA certified cushion cut diamond weighing 1.77 carats, D color, Internally flawless clarity
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

GIA Certified 8.03 Carat Cushion Cut Diamond Ring
By Diana M. Jewels
Located in New York, NY
Platinum handmade diamond ring, features 8.03 Carats Cushion Cut diamond, J in Color VS2 in Clarity
Category

21st Century and Contemporary American Bridal Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified Fancy Light Yellow Cushion Three Stone Halo Ring 3.93 Carats 18K
By Harbor Diamonds
Located in New York, NY
GIA Certified Fancy Light Yellow Cushion weighing 2.96 Carats flanked with two half moon diamonds
Category

2010s Contemporary Engagement Rings

Materials

Yellow Diamond, 18k Gold, White Gold

GIA Certified 21.68ct Cushion Cut Diamond Ring 18kt
Located in New York, NY
GIA certified 21.68ct Natural Cushion cut diamond. Excellent clean clarity brilliant cut. Report
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, 18k Gold

GIA Certified 2 Carat Cushion Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
exquisite Platinum Engagement Ring adorned with a stunning Elongated Cushion Brilliant Cut Halo
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 2 Carat Cushion Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
exquisite Platinum Engagement Ring adorned with a stunning Elongated Cushion Brilliant Cut Halo
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 7 Carat Cushion Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
Exquisite Platinum Engagement Ring adorned with a stunning Elongated Cushion Brilliant Cut Halo
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified Cushion Cut Engagement Ring
Located in New York, NY
2.03 carat GIA certified G color, VS1 clarity center diamond. 1.28 carats of matching round
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.92 Carat No Heat Cushion Purple Sapphire Diamond Pave Gold Ring
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Carat The Sapphire is GIA Certified NO HEAT There are 1.20 Carats in Diamonds F/G VS/SI The ring is a
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

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

GIA Certified Yellow Cushion Cut Diamond Engagement Ring
By Privosa Fine Jewelry
Located in Houston, TX
ring to sparkle even more! The yellow diamond is GIA certified and is accompanied by a diamond grading
Category

2010s American Modern Engagement Rings

Materials

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

GIA Certified Natkina Engagement Ring Cushion Diamond Cut
By Natkina
Located in Montreux, CH
does. Create a unique engagement ring at a reasonable price with NATKINA. Story: She is unique. Her
Category

2010s Swiss Contemporary Engagement Rings

Materials

Diamond, 18k Gold

GIA Certified 2.24 Carat Cushion Blue Sapphire Diamond Three-Stone Gold Ring
By Diamond Stars Jewelry, Inc.
Located in New York, NY
Stunning Three Stone Sapphire and Diamond Ring The ring is 18K White Gold The Cushion Blue Sapphire
Category

21st Century and Contemporary American Contemporary Three-Stone Rings

Materials

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

GIA Certified Cushion Cut Double Halo Diamond Engagement Ring
Located in New York, NY
2.01 carat G color, VS2 clarity GIA certified cushion cut center diamond. 1.01 carats of
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

8 Carat GIA Certified Fancy Yellow Diamond Ring
By Diamond Scene New York
Located in New York, NY
color and is full of life. GIA certified 8.33 carat Fancy Yellow VS1 cushion cut diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Yellow Diamond

Estate 10.73 Carat Gia Certified Cushion Cut Diamond Ring
By Diana M. Jewels
Located in New York, NY
Cushion cut Diamond Engagement Ring showcases a magnificent 10.73-carat, GIA-certified (GIA
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, White Diamond

GIA Certified Fancy Brown-Pink Cushion Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
Cushion Cut Natural Fancy Brown-Pink Diamond Double Halo Engagement Ring The ring weighs 5.6
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Pink Diamond, 18k Gold, White Gold, Yellow Gold

GIA Certified Fancy Brownish Yellow Cushion VVS1 Kite Diamond 6.34 CTTW Platinum
By Harbor Diamonds
Located in New York, NY
Three stone ring featuring one GIA Certified Fancy Brownish Yellow Cushion, 5.67 Carats, VVS1
Category

2010s Contemporary Three-Stone Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

GIA Certified 3.28 Ct Vivid Blue Cushion Cut Ceylon Sapphire Ring in 18k ref544
By Diamond Town
Located in New York, NY
Behold this magnificent ring, graced by the presence of a GIA Certified cushion-cut vivid blue
Category

21st Century and Contemporary Contemporary Engagement Rings

Materials

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

GIA Certified 1.71 Carat Yellow Diamond Engagement Ring
By Diamond Scene New York
Located in New York, NY
A gorgeous yellow diamond ring!! 1.71 carat GIA certified Cushion cut Fancy Light Yellow, VS1
Category

21st Century and Contemporary Engagement Rings

Materials

Yellow Diamond, Platinum

GIA Certified Platinum Cushion Cut Diamond Ring 1.51 Carat
Located in London, GB
A stunning platinum cushion cut diamond engagement ring. The ring comprises of a cushion cut
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Certified 4.50 Carat Cushion Cut Forest Green Sapphire Ring in 18W/Y ref1216
By Diamond Town
Located in New York, NY
This ring is a stunning piece that combines elegance with uniqueness. The 4.50 carat cushion-cut
Category

21st Century and Contemporary Contemporary Fashion Rings

Materials

Green Sapphire, Sapphire, Yellow Diamond, White Diamond, Diamond, Yellow...

GIA Certified 1.20 Carat Cushion Blue Diamond Engagement Ring
Located in Trumbull, CT
This opulent ring boasts a highly desirable GIA Certified 1.20 Carat cushion shape Natural Blue
Category

21st Century and Contemporary American Artisan Engagement Rings

Materials

White Diamond, Blue Diamond, Pink Diamond, 18k Gold

GIA Certified 10 Carat Cushion Cut Diamond Engagement Ring
By Antinori Fine Jewels
Located in Rome, IT
diamond is certified by GIA. The center stone is just over 10 cts, H in color, Internally Flawless in
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond

GIA Certified 5 Carat Fancy Yellow Cushion Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
This exquisite ring features a stunning 5 ct Cushion Modified diamond that exudes a captivating
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, Yellow Diamond

Exceptional GIA Certified 4 Carat Cushion Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
EXCEPTIONAL GIA Certified 4 Carat Cushion Cut Diamond Ring vs2 clarity H color excellent polish
Category

2010s Italian Modern Solitaire Rings

Materials

Diamond, White Diamond, 18k Gold

GIA Certified Cushion Cut Diamond Ring and Band Set
Located in Boca Raton, FL
Material: 14k White Gold Engagement Ring Diamond Details: GIA certified 0.84ct cushion cut diamond
Category

21st Century and Contemporary Unknown Wedding Rings

Materials

Diamond, White Diamond, 14k Gold, White Gold

GIA Certified 5 Carat Cushion Cut Diamond Ring FLAWLESS
By Antinori Fine Jewels
Located in Rome, IT
A really amazing diamond. The main stone is certified by GIA E Color white faced FLAWLESS Clarity
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond

GIA Certified 5.01 Carat Yellow Cushion Diamond Engagement Ring
Located in PARIS, FR
We invite you to discover this majestic ring set with a 5.01-carat GIA-certified cushion-cut yellow
Category

2010s Asian Modern Engagement Rings

Materials

Diamond, Yellow Diamond, 18k Gold

GIA Certified 4 Carat Fancy Intense Yellow Diamond Ring
By Diamond Scene New York
Located in New York, NY
Stunning cushion cut 4.30 carat GIA certified Fancy Intense Yellow diamond, SI2. Set with 1.10
Category

21st Century and Contemporary Engagement Rings

Materials

Yellow Diamond

GIA Certified True Antique Cushion Diamond Platinum Engagement Ring
By Leon Mege
Located in New York, NY
with the sweet Princessa™ platinum solitaire featuring a lovely 0.83-carat GIA I/VS1 antique cushion
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 1.74 Carat Cushion Cut Diamond Engagement Ring
By Natkina
Located in Montreux, CH
Polish. Shape and Cutting Style: Cushion Modified Brilliant Measurements 6.98 x 6.59 x 4.55 mm Diamond 1
Category

2010s Swiss Contemporary Engagement Rings

Materials

Diamond, 18k Gold, Rose Gold

GIA Certified 5.05 Carat Cushion Cut Natural Diamond Engagement Ring
Located in Los Angeles, CA
The sparkle on this diamond ... WOW! This beautiful 5.05ct Cushion Cut Diamond G-SI1 in Quality
Category

2010s Engagement Rings

Materials

Diamond, Platinum

GIA Certified Cushion 10.19 CTS Y-Z VS2 Trapezoid Three Stone Ring Platinum 18K
By Harbor Diamonds
Located in New York, NY
GIA Certified Cushion diamond weighing 10.19 Carats Y to Z Range VS2 flanked with two Trapezoids
Category

2010s Contemporary Three-Stone Rings

Materials

Yellow Diamond, 18k Gold, Yellow Gold, Platinum

GIA Certified 1.5 Carat Cushion cut Diamond Ring in Platinum
Located in London, GB
GIA Certified 1.5 Carat Cushion cut Diamond Ring in Platinum. This striking Platinum ring features
Category

21st Century and Contemporary Contemporary Wedding Rings

Materials

Diamond, Platinum

GIA Certified 1 Carat Cushion cut Diamond Ring in Platinum
Located in London, GB
GIA Certified 1 Carat Cushion cut Diamond Ring in Platinum. This alluring Platinum ring features a
Category

21st Century and Contemporary Contemporary Wedding Rings

Materials

Diamond, Platinum

GIA Certified 4 Carat Cushion Cut Diamond Platinum Solitaire Ring
By Antinori Fine Jewels
Located in Rome, IT
The GIA Certified Brilliant Cushion Diamond Ring Elevate your love story with this exquisite
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified Platinum Cushion Cut Diamond Ring 1.55ct G/VVS1
Located in London, GB
A stunning platinum cushion cut diamond engagement ring. The ring features a cushion cut diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Certified 5 Carat Cushion Cut VS Diamond Engagement Ring
By Antinori Fine Jewels
Located in Rome, IT
Elevate your love story with this exquisite GIA Certified 5 Carat Cushion Cut I Color VS1 Diamond
Category

2010s Unknown Modern Solitaire Rings

Materials

Diamond, White Diamond, 18k Gold

GIA Certified Platinum Cushion Cut Diamond Engagement Ring 2.00 Carat
Located in London, GB
An 18k white gold cushion cut diamond ring. The ring comprises of a cushion cut diamond in a four
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Certified Platinum Cushion Cut Diamond Engagement Ring 0.81 Carat
Located in London, GB
A beautiful platinum cushion cut diamond ring. The platinum ring comprises of a cushion cut diamond
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Cert 2.55 Ct Cushion Ceylon Sapphire and 2.44ct Natural Diamond Ring ref1045
By Diamond Town
Located in New York, NY
Featuring a GIA Certified 2.55 carat cushion-cut Ceylon Sapphire at its center, elegantly encircled
Category

21st Century and Contemporary Contemporary Bridal Rings

Materials

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

GIA Certified 2.01ct Natural Blue Cushion Diamond Ring with Pink Diamonds
By Ounce Collection Jewelry
Located in Los Angeles, CA
Natural Faint Blue Cushion is 2.01ct SI2 GIA Certified 3.47ct Total Diamond Weight Designed, Handpicked
Category

21st Century and Contemporary Cocktail Rings

Materials

White Diamond, Blue Diamond, Pink Diamond, 18k Gold, White Gold

GIA Certified 1.02 Carat Cushion Diamond Platinum Halo Engagement Ring
Located in Stamford, CT
Diamond engagement ring. GIA certified cushion cut diamond center stone, set in platinum with a
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA Certified 1.50 Carat Cushion Cut Diamond White Gold Ring
Located in New York, NY
chemicals. Details: 18k White Gold Cushion Diamond 1.50cts VS2 GIA Certified
Category

21st Century and Contemporary Bridal Rings

Materials

Diamond, 18k Gold, White Gold

GIA Certified Shreve & Co 2 Ct Cushion Diamond Engagement Ring
By Shreve & Co.
Located in Santa Barbara, CA
era. Weighing a stately 2.05 carats, the expertly cut brilliant cushion diamond arrives with a GIA
Category

Early 2000s Art Deco Engagement Rings

Materials

Diamond, Platinum

GIA Certified 4 Carat Fancy Yellow Cushion Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
sparkling pavé diamonds. The setting is made in platinum and 18k yellow gold. This custom ring is a
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

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Gia Certified Cushion Diamond Ring For Sale on 1stDibs

You are likely to find exactly the gia certified cushion diamond ring you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and Platinum. You can easily find a 97 antique edition and 853 modern creations to choose from as well. Finding the perfect gia certified cushion diamond ring may mean sifting through those created during different time periods — you can find an early version that dates to the 19th Century and a newer variation that were made 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 gia certified cushion diamond ring from Antinori Fine Jewels, Roman Malakov and J. Birnbach — each of whom created a beautiful version of this treasured accessory — is worth considering. Today, if you’re looking for a cushion cut version of this piece and are unable to find the perfect match, our selection also includes antique cushion cut and round cut alternatives. There aren’t many items for men if you’re seeking a gia certified cushion diamond ring, as most of the options available are for women and unisex.

How Much is a Gia Certified Cushion Diamond Ring?

Prices for a gia certified cushion diamond ring can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $1,800 and can go as high as $1,125,000, while this accessory, on average, fetches $22,461.

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 Bvlgari 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 Gia Certified Cushion Diamond Ring
  • 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.