Certified 20 Carat
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GIA Certified 20 Carat Round Brilliant Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
GIA Certified 20 Carat Round Brilliant Cut Diamond Ring
the main stone is an investment grade
Category
2010s Italian Modern Engagement Rings
Materials
Diamond, White Diamond, 18k Gold
GIA Certified 20 Carat Emerald Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
20 Carat Emerald Cut Platinum Solitaire Ring!
Indulge in sheer elegance with our GIA certified
Category
2010s Unknown Contemporary Engagement Rings
Materials
Diamond, White Diamond, Emerald, Platinum
Certified 20 Carats Round Brilliant Cut Diamond Necklace
Located in Rome, IT
19.20 carats of brilliantly white natural diamonds form a shimmering stream which cascades gracefully
Category
2010s Unknown Choker Necklaces
Materials
White Diamond, Diamond, 14k Gold
GIA Certified 20 Carat COLOMBIAN MINOR OIL Ring
By Antinori Fine Jewels
Located in Rome, IT
An investment grade Oval Cut Natural Colombian Green Emerald & Pear Cut Diamond Engagement Ring.
The ring weighs 16.9 grams, size 6.5. The center stone is a very lively Natural Ova...
Category
2010s Italian Modern Solitaire Rings
Materials
Diamond, White Diamond, Emerald, Platinum, 18k Gold, Yellow Gold
GIA Certified 20 Carat Emerald Cut Diamond Engagement Ring
By GEMME
Located in New York, NY
Wow! The Ultimate Emerald Cut Diamond Ring.
GIA Certified as J color VS clarity.
Set with shield
Category
2010s Three-Stone Rings
Materials
Diamond, Platinum
GIA Certified .20 Carat Burma Myanmar Ruby Diamond Victorian Yellow Gold Ring
Located in Stamford, CT
Vintage Victorian 1880's ruby and diamond yellow gold ring. GIA certified natural no heat .20cts
Category
Antique Late 19th Century Engagement Rings
Materials
Diamond, Ruby, Gold, 18k Gold, Yellow Gold
Spectacular GIA Certified 20, 17 Carats of Diamonds
Located in Massafra, IT
So big and beautiful GIA certified natural diamonds 10,10 carats W to X range color , clarity IF
Category
21st Century and Contemporary Stud Earrings
Certified Significant Diamond Cluster Earrings 20 Carats D Colour
Located in London, GB
A pair of decadent diamond cluster earrings in platinum. Each earring is composed of a cluster design encompassing a mixture of round brilliant cut, pear cut and marquise cut diamond...
Category
21st Century and Contemporary Chandelier Earrings
Materials
Diamond, Platinum
Certified Imperial Jade 20 Carats, Pink Tourmaline & Diamond Goldfish Pendant.
Located in Hong Kong, HK
Please check out the HD video! This goldfish pendant is amazing and it GLOWS. It is equally good looking from the front as it is from the back. The imperial jade is full of "water". ...
Category
2010s Hong Kong Pendant Necklaces
Materials
Coral, Diamond, Tourmaline, White Diamond, Jade, Gold, 18k Gold, White Gold
20 Carat Oval Cut Diamond Engagement Ring GIA Certified FVOP VS2
Located in New York, NY
RHAEGAL 20 CARAT MEN’S PINK DIAMOND CHANDELIER ENGAGEMENT RING 14K WHITE GOLD BY MIKE NEKTA NYC
Category
2010s American Engagement Rings
Materials
Diamond, 14k Gold, 18k Gold, White Gold
20 Carat Fancy Deep Brown Orange Diamond Engagement Ring, GIA Certified
Located in New York, NY
Absolutely stunning engagement ring style showcasing a GIA Certified 20.59 Carat Fancy Deep Brown
Category
21st Century and Contemporary American Contemporary Engagement Rings
Materials
Diamond, Yellow Diamond, 18k Gold, White Gold
20 Carats Combine Mix Shape Single Row Diamond Bracelet Certified Y
Located in New York, NY
The COLETTE 20.14 Carat Diamond Single Row Bracelet features COMBINE MIX SHAPE DIAMONDS brilliants
Category
2010s American Tennis Bracelets
Materials
Yellow Diamond, Diamond, 18k Gold, White Gold
~20 Carat Colombian Emerald Cushion Cut GRS Certified and Diamond 18K Set
By Gad & Co.
Located in Miami, FL
Certificate: GRS Certified
Side Stone Details:
Gemstone Type: Diamond
Carat: 6.00 carats (total for both
Category
21st Century and Contemporary Cocktail Rings
Materials
Diamond, White Diamond, Emerald, Gold, 18k Gold, White Gold, Yellow Gold
IGI Certified 1.50 Ct Heart Shape Diamond Necklace with 20 Carat Black Diamonds
Located in New York, NY
14k white gold.
The necklace is designed with 230 natural black briolette diamonds 20 Carat total
Category
2010s American Contemporary Pendant Necklaces
Materials
Diamond, 14k Gold, White Gold
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W 0.3 in D 0.16 in L 0.32 in
20 Carat Blue Sapphire Ring
By Diamond Scene New York
Located in New York, NY
An INCREDIBLE Sapphire!
20.07 carat oval “Royal” Vivid Blue center Ceylon sapphire.
1.32 carat
Category
21st Century and Contemporary Cocktail Rings
Materials
Blue Sapphire, Platinum
Retro 20 Carat Coral & Diamond Cocktail Ring
Located in Santa Barbara, CA
. Featuring a large cabochon coral weighing over 20 carats, geometrically accented with sparkling natural
Category
Vintage 1940s Retro Cocktail Rings
Materials
Coral, Diamond, 14k Gold, Yellow Gold
Exceptional GIA Certified Ct 20, 00 Fancy Intense Yellow Diamond
Located in Massafra, IT
An incredible and rare big natural fancy intense yellow diamond, GIA certified 20,00 carats, VS2
Category
21st Century and Contemporary Pendant Necklaces
Materials
Yellow Diamond
EGL Certified 1.03 Carat Diamond Platinum Fishtail Engagement Ring
Located in Stamford, CT
transitional cut 1.03 carat diamond and bar set straight baguette side diamonds. EGL certified
1 round
Category
Mid-20th Century Engagement Rings
Materials
Diamond, Platinum
GRS Certified 10.11 Carat Natural Untreated Pink Sapphire Ring
Located in Weston, MA
boasts a remarkable 10-carat natural untreated pink sapphire, one of the world's most precious and rare
Category
2010s American Empire Cocktail Rings
Materials
Sapphire, 18k Gold
Peter Suchy EGL Certified 1.19 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Peter Suchy diamond platinum engagement ring. EGL certified 1.19ct center stone in a platinum
Category
21st Century and Contemporary Engagement Rings
Materials
Diamond, Platinum
Peter Suchy GIA Certified 3.37 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Peter Suchy 3.37 Carat Brilliant Diamond Engagement Ring. GIA certified center stone, set in a
Category
21st Century and Contemporary Engagement Rings
Materials
Diamond, Platinum
GIA Certified 1.66 Carats Natural Pear Shaped Lavender Sapphire Engagement Ring
Located in Los Angeles, CA
Discover the captivating beauty of this GIA Certified 1.66 Carats Natural Lavender Sapphire
Category
2010s Engagement Rings
Materials
Sapphire, 18k Gold
0.65 Carat Diamond Cocktail Ring GIA Certified
Located in Kowloon, HK
➛ GIA certified
Diamond 2-
➛ Stone Shape: Round
➛ Stone Color: U to V Range
➛ Stone Weight: 0.35 carats
Category
2010s Asian Wedding Rings
Materials
Diamond, Pink Diamond, 18k Gold, White Gold
Peter Suchy EGL Certified 1.61 Carat Diamond Platinum Engagement Ring
By Peter Suchy
Located in Stamford, CT
Diamond engagement ring. EGL certified 1.61ct center stone set in a custom made platinum setting
Category
21st Century and Contemporary Engagement Rings
Materials
Diamond, Platinum
GIA Certified .84 Carat Emerald Diamond White Gold Pendant Necklace
By Peter Suchy
Located in Stamford, CT
Natural GIA Certified Emarald and diamond pendant necklace. GIA certified .84 carat octagonal
Category
21st Century and Contemporary Pendant Necklaces
Materials
Diamond, Emerald, Gold, 14k Gold, White Gold
Peter Suchy EGL Certified 1.43 Carat Diamond Platinum Pendant Necklace
By Peter Suchy
Located in Stamford, CT
1.01cts, G, I1, 8.63 x 5.50 x 3.56mm, EGL certificate #US30369202D
20 full cut fine white well cut
Category
21st Century and Contemporary Pendant Necklaces
Materials
Diamond, Platinum
Charming 0.70 Carat GIA Certified Diamond Sapphire Platinum Halo Engagement Ring
Located in New York, NY
Made of platinum, this ring is centered with a sparkling GIA certified round brilliant cut diamond
Category
Late 20th Century Art Deco Engagement Rings
Materials
Diamond, Sapphire, Platinum
Wefferling Berry GIA Certified 1.11 Carat Sapphire Moonstone Gold Bracelet
Located in Stamford, CT
sapphires totaling 1.11 carats. GIA certified the sapphire's as Yogo Gulch. The combination of the sapphires
Category
Early 20th Century Link Bracelets
Materials
Moonstone, Sapphire, Gold, 14k Gold, Yellow Gold
1960s GIA 20 carats Aquamarine Diamond Platinum Cocktail Ring
Located in Miami, FL
diamonds on a platinum mounting.
Aquamarine is reported to be approx. 20 carats. From Natural Beryl
Category
Vintage 1960s Retro Cocktail Rings
Materials
Aquamarine, Diamond, Platinum
GIA Certified 45.18 Carat Star Sapphire Diamond Platinum Cocktail Ring
Located in Stamford, CT
diamonds, Approximate .90 carats
4 trapezoid cut diamonds, Approximate .15 carats
20 round brilliant cut
Category
Early 20th Century Cocktail Rings
Materials
Sapphire, Blue Sapphire, Diamond, Star Sapphire, Platinum
Peter Suchy GIA Certified 1.50 Carat Diamond Sapphire Platinum Ring
By Peter Suchy
Located in Stamford, CT
Peter Suchy diamond and sapphire platinum engagement. GIA certified round center stone with a halo
Category
21st Century and Contemporary Engagement Rings
Materials
Diamond, Sapphire, Blue Sapphire, Platinum
GIA Certified 1.35 Carat Platinum Engagement Ring
Located in Atlanta, GA
Side Diamond Details:
Weight: .20 carat, total weight
Cut: Antique Straight Baguette
Color: G
Clarity
Category
Vintage 1930s Unknown Art Deco Engagement Rings
Materials
White Diamond, Platinum
GIA Certified 8.11 Carat Blue Sapphire and Diamond Cocktail Ring
Located in Beverly Hills, CA
GIA certified 8.11 carat marquise shape blue sapphire and diamond engagement ring. The sapphire is
Category
Vintage 1940s Unknown Retro Cocktail Rings
Materials
Blue Sapphire, Sapphire, White Diamond, Diamond, Gold, Yellow Gold, 14k ...
GIA Certified 1.01 Carat Diamond Engagement Ring
Located in Atlanta, GA
Yellow (O-P)
Clarity: VVS2
Side Stone Details:
Weight: .20 carat total weight
Cut: Old European
Color
Category
Vintage 1930s Unknown Art Deco Engagement Rings
Materials
White Diamond, Platinum
GIA Certified 4.01 Carat Diamond Platinum Split Shank Engagement Ring
Located in Stamford, CT
certified.
1 round ideal cut diamond, approx. 4.01ct. total weight. GIA M color, GIA Certificate
Category
Early 20th Century Unknown Engagement Rings
Materials
Diamond, Platinum
GIA Certified 4.25 Carat Blue Sapphire Pearl Yellow Gold Necklace
Located in Stamford, CT
Vintage 1920's sapphire and pearl necklace. Graduated crescent shape sections set with 4.25 carats
Category
Early 20th Century Link Necklaces
Materials
Sapphire, Pearl, Blue Sapphire, Gold, 14k Gold, Yellow Gold
GIA Certified 0.72 Carat Diamond 18 Carat Gold Contempoaray Engagement Ring
Located in Hamilton, AU
six claw setting, home to a captivating GIA certified 0.50 carat round brilliant diamond. This
Category
21st Century and Contemporary Australian Contemporary Engagement Rings
Materials
Diamond, Gold, 18k Gold, White Gold
Retro Deep Blue 20 Carat Cushion Aquamarine Cocktail Ring
Located in Santa Barbara, CA
This cocktail ring features the most amazing aquamarine you've ever seen. The large, 20.75 carat
Category
Vintage 1940s Retro Cocktail Rings
Materials
Aquamarine, Diamond, Platinum
GIA Certified 1.70 Carat Diamond Ruby Yellow Gold Cocktail Ring
Located in Stamford, CT
halos of custom cut pink/red rubies and round diamonds. GIA certified.
One Ideal cut round diamond
Category
Late 20th Century Fashion Rings
Materials
Diamond, Ruby, Yellow Gold, Gold, 18k Gold
GRS Certified 16.50 Carat Natural Emerald Diamond Halo Cocktail Ring in Platinum
Located in La Jolla, CA
GRS Certified 16.50 Carat Natural Emerald Diamond Halo Cocktail Ring in Platinum
Emerald and
Category
21st Century and Contemporary Unknown Cocktail Rings
Materials
Diamond, Emerald, Platinum
Peter Suchy EGL Certified .66 Carat Marquise Diamond Halo Pendant Necklace
By Peter Suchy
Located in Stamford, CT
made bezel setting accented with a halo of 20 full cut diamonds. The EGL certified this stone as K-L
Category
21st Century and Contemporary Pendant Necklaces
Materials
Diamond, Gold, White Gold, 14k Gold
Peter Suchy GIA Certified 4.16 Carat Sapphire Diamond Gold Pendant Necklace
By Peter Suchy
Located in Stamford, CT
sapphire center stone. The rich deep blue gemstone is GIA certified simple heat only. It is mounted in a
Category
21st Century and Contemporary Pendant Necklaces
Materials
Diamond, Sapphire, Gold, 14k Gold, White Gold
GIA Certified 1.11 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
Side Stone Details:
Shape: Old European Brilliant
Total Carat Weight: .20 carat, total weight
Color
Category
Vintage 1920s Unknown Art Deco Engagement Rings
Materials
White Diamond, Platinum
GIA Certified 1.00 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
: VVS2
Side Stone Details:
Shape: Old European Brilliant
Total Carat Weight: .20 carat, total weight
Category
Vintage 1920s Unknown Art Deco Engagement Rings
Materials
White Diamond, Platinum
GIA Certified 1.03 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
CERTIFIED Center Diamond - Certificate # 2195689773
Shape: Old European Brilliant
Carat Weight: 1.03 carat
Category
Vintage 1920s Unknown Art Deco Engagement Rings
Materials
White Diamond, Platinum
5 Carat Princess Cut Diamon Eternity Band Certified
Located in New York, NY
Eternity Band Diamond:
Carat Weight: 5.27 Carats
Number of Diamonds: 20
Style: Princess Cut
Category
2010s American Band Rings
Materials
Diamond, 18k Gold, White Gold
GIA Certified 1.24 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
CERTIFIED Center Diamond - Certificate # 5192365470
Shape: Old European Brilliant
Carat Weight: 1.24 carat
Category
Vintage 1920s Unknown Art Deco Engagement Rings
Materials
White Diamond, Platinum
GIA Certified 1.07 Carat Diamond Platinum Engagement Ring
Located in Atlanta, GA
CERTIFIED Center Diamond - Certificate # 120605741
Shape: Circular Brilliant
Carat Weight: 1.07 carat
Color
Category
Vintage 1920s Unknown Art Deco Engagement Rings
Materials
Blue Sapphire, White Diamond, Sapphire, Platinum
GRS Certified 108 Carat Carved Pastel Green Emerald Regal Pendant Necklace
By Gad & Co.
Located in Miami, FL
GRS Certified 108.04 Carat Minor to Moderate Oil Ural Origin Carved Emerald and Diamond Heavy
Category
Mid-20th Century North American Retro Pendant Necklaces
Materials
Diamond, Emerald, Sapphire, Gold, 18k Gold, Yellow Gold
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H 2 in W 2 in L 20 in
Peter Suchy EGL Certified 1.36 Carat Diamond Platinum Dangle Pendant Necklace
By Peter Suchy
Located in Stamford, CT
one on top of the other connected by links with a 20 Inch platinum link chain with a lobster clasp
Category
21st Century and Contemporary Pendant Necklaces
Materials
Diamond, Platinum
0.60 Carat Faint Pink Diamond Earrings GIA Certified
Located in Kowloon, HK
: 0.31 carats
➛ GIA certified
♦ SIDE STONE DETAILS
➛ Side white diamonds - 118 pcs - 0.802 cts
➛ Side
Category
2010s Asian Dangle Earrings
Materials
Diamond, White Diamond, Pink Diamond, 18k Gold, White Gold
Natural No Heat Ceylon 20 Carat Sapphire Diamond Ring
Located in Bal Harbour, FL
weighs 20.13 carats and is certified by both the GRS and the AIGS to be of Ceylon (Sri Lanka) origin and
Category
2010s American Cluster Rings
Materials
Blue Sapphire, White Diamond, Platinum
GIA Certified 8.18 Carat Blue Sapphire Diamond Platinum Ring, Sapphire Jewelry
Located in Los Angeles, CA
6.56 mm
Diamonds
Quantity 20
Total Weight 3.06 carats
Color White
Color intensity G-H
Shape Round
Category
21st Century and Contemporary American Art Deco Cocktail Rings
Materials
Diamond, Blue Sapphire, Platinum
FGL Certified 2.15 Carat Cushion Alexandrite Diamond Halo Gold Engagement Ring
Located in Stamford, CT
Alexandrite chrysoberyl and diamond engagement ring. FGL Natural untreated French gem lab certified
Category
21st Century and Contemporary Engagement Rings
Materials
Alexandrite, Chrysoberyl, Diamond, Gold, 18k Gold, Yellow Gold
GIA Certified 1.29 Carat Calibre Sapphire Diamond Platinum Domed Engagement Ring
Located in Stamford, CT
1940's late Art Deco Diamond and sapphire late Art Deco engagement ring. GIA certified center round
Category
Early 20th Century Engagement Rings
Materials
Sapphire, Blue Sapphire, Diamond, Platinum
2.00 Carat Diamond Ring I1 Clarity GIA Certified
Located in Kowloon, HK
Shape: Cushion
➛ Stone Color: U to V Range
➛ Stone Weight: 2.00 carat
➛ Clarity: I1
➛ GIA certified
♦
Category
2010s Asian Wedding Rings
Materials
Diamond, White Diamond, 18k Gold, White Gold
EGL Certified .47 Carat Diamond White Gold Victorian Revival Engagement Ring
Located in Stamford, CT
Beautiful, 1990's Victorian revival diamond engagement ring. EGL certified .47ct Old European round
Category
Late 20th Century Engagement Rings
Materials
Diamond, Gold, 18k Gold, White Gold
GIA Certified 1 Carat Emerald Cut Diamond 18k White Gold Ring
By Antinori Fine Jewels
Located in Rome, IT
. Measuring 6.38 x 4.45 x 3.19 mm, it's a true testament to perfection.
Enhancing its allure are 20 Natural
Category
2010s Unknown Contemporary Engagement Rings
Materials
Diamond, Emerald, 18k Gold, White Gold
GIA Certified .67 Carat Emerald Diamond Halo Rose Gold Engagement Ring
Located in Stamford, CT
Emerald and diamond engagement ring. GIA certified octagonal emerald center stone set in a 14k rose
Category
21st Century and Contemporary Engagement Rings
Materials
Diamond, Emerald, Gold, 14k Gold, Rose Gold
1.01 Carat Certified Fancy Yellow Pear Diamond and 0.42 Carat Engagement Ring
Located in Hamilton, AU
certified 1.01 carat fancy intense yellow pear shape diamond encompassed by a glittering border of round
Category
21st Century and Contemporary Australian Contemporary Engagement Rings
Materials
Diamond, 18k Gold, White Gold
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Certified 20 Carat For Sale on 1stDibs
Surely you’ll find the exact certified 20 carat you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Frequently made of platinum, gold and 18k gold, this item was constructed with great care. Our collection of these items for sale includes 1199 vintage editions and 250 modern creations to choose from as well. If you’re looking for a certified 20 carat from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 19th Century while another version may have been produced as recently as the 21st Century. As it relates to this specific piece, our collection includes designs that are universally popular, but .5 carat and 1 carat carat weights, specifically, are sought with frequency. There have been many well-made iterations of the classic certified 20 carat over the years, but those made by Antinori Fine Jewels, Tiffany & Co. and J. Birnbach are often thought to be among the most beautiful. A round cut version of this piece has appeal, but there are also oval cut and old european cut versions for sale. Finding a certified 20 carat for sale for women should be easy, but there are 332 pieces available to browse for unisex as well as men, too.
How Much is a Certified 20 Carat?
Prices for a certified 20 carat can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $244 and can go as high as $6,600,000, while this accessory, on average, fetches $10,717.
Questions About Certified 20 Carat
- 1stDibs ExpertApril 5, 2022The term “20 carat gold” does not have a meaning. “Carat” is a unit of measurement used to describe the size of gemstones. “Karat” is the unit used to describe gold precious metal. Gold stamped as 20 karat or 20K is 83.3 percent pure gold and 16.7 percent metal alloy. You'll find a wide variety of gemstone jewelry on 1stDibs.
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