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20 Carat Gemstones

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20 Carats Natural Golden Hued Zircon Stone Lot Loose Gemstone From Pakistan
Located in Bangkok, TH
Gemstone Name Natural Golden Zircon Lot Weight 20 carats (1.68 carats each) Dimensions 6.96 x 6.86
Category

21st Century and Contemporary Pakistani Modern Loose Gemstones

Materials

Zircon

30.10 Carats 20 Mm Round Peach Tourmaline Faceted Cut Stone Natural Gemstone
Located in Jaipur, RJ
Gemstone - Tourmaline Weight- 30.10 Carats Shape - round Size - 20 MM Pieces - 1
Category

21st Century and Contemporary Congolese Art Deco Loose Gemstones

Materials

Tourmaline

Rare Orange Creamy Natural Fire Opal Gemstone Cabochons, 20 Ct for Jewelry
Located in Peshawar, PK
GEMSTONE TYPE: Opal PIECE(S): 3 WEIGHT: 20 Carats SHAPE: Oval and Pear Shape Cabochons SIZE (MM
Category

21st Century and Contemporary Ethiopian Contemporary Loose Gemstones

Materials

Opal, Fire Opal

63.70 Carat Huge Natural Loose Seafoam Blue Aquamarine Gemstone March Birthstone
Located in Peshawar, PK
Loose Aquamarine Weight: 63.70 Carat Dimension: 26 x 20 x 18 Mm Colour : Pale Blue Origin
Category

21st Century and Contemporary Malagasy Arts and Crafts Loose Gemstones

Materials

Aquamarine

38.90 Carat Natural Loose Dark Purple Amethyst Long Cushion Shape Gemstone
Located in Peshawar, PK
Loose Amethyst Weight: 38.90 Carats Dimension: 20 x 19 x 15.7 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

0.91 Carat Precisely Cut Asscher Silver Spinel Solitaire Ring Loose Gemstone
Located in Bangkok, TH
Although spinel has been used in jewelry since ancient times, this gemstone has only recently
Category

21st Century and Contemporary Burmese Modern Loose Gemstones

Materials

Spinel

35.95 Carat Natural Loose Flower Cut Lemon Quartz Citrine Octagon Shape Gemstone
Located in Peshawar, PK
Loose Lemon Quartz Citrine Weight: 35.95 Carats Dimension: 22 x 20 x 14.5 Mm Origin: Brazil Shape
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Citrine

11.50 Carat Enchanting Elegance Stunning Asscher Cut Green Amethyst Ring Gem
Located in Peshawar, PK
Faceted Green Amethyst Weight: 11.50 Carats Dimension: 14.5x11.7x9.9 Mm Origin: Brazil Shape
Category

Mid-20th Century Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

Antique Hardstone Intaglio - Unset Gemstone - Europe - Early 20th Century
Located in Chatham, CA
Antique Roman style hardstone intaglio gemstone - hand carved male warrior in profile
Category

Early 20th Century European Classical Roman Loose Gemstones

10.65 Carat Natural Loose Amethyst Tear Drop Shape Gem For Necklace
Located in Peshawar, PK
Loose Amethyst Weight: 10.65 Carats Dimension: 20 x 10.9 x 9.1 Mm Colour: Purple Origin: Brazil
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Amethyst

21.40 Carat Pretty Loose Light Blue Topaz Pear Shape Gem For Necklace
Located in Peshawar, PK
Faceted Light Blue Topaz Weight: 21.40 Carats Dimension: 20 x 14 x 10.5 Mm Origin: Brazil Color
Category

21st Century and Contemporary Brazilian Arts and Crafts Loose Gemstones

Materials

Blue Topaz

UNHEATED ORANGE Sapphire, 1.33ct, Madagascar (No Treatment at all)
Located in Methuen, MA
with him for about 20 years or so. This gemstone would make a great piece for a man or a woman - and
Category

2010s African Loose Gemstones

Materials

Sapphire

5ct Unheated Mozambican 'Pigeons Blood' Ruby
Located in London, GB
over 5 carats, this stone is of substantial size. As well as the fact that it is spared of any thermal
Category

2010s Mozambican Loose Gemstones

Materials

Ruby

5ct Unheated Mozambican 'Pigeons Blood' Ruby
5ct Unheated Mozambican 'Pigeons Blood' Ruby
Free Shipping
W 0.46 in D 0.24 in L 0.35 in
45.96ct Pyrope-Almandine Pear Cabochon Purple Rhodolite Garnet from Mozambique W
Located in Toronto, Ontario
Description: Gem Type: Rhodolite Garnet Number of Stones: 20 Weight: 45.96 cts Measurements: 10.00
Category

2010s Mozambican Loose Gemstones

Materials

Rhodolite

Multi-Colored OREGON Sunstone, 8.47ct, Faceted by the Owner of ATG!
Located in Methuen, MA
trimmed and preformed (yield was 23% - typical expectation is only 20%) - see image below. Body color
Category

2010s North American Loose Gemstones

Materials

Labradorite

Unheated Saphires yellow purple NATURAL COLOR 0.96 ct Ilakaka Mine Madagascar
Located in Viena, Viena
. The “Banque Suisse” mine near Ilakaka is probably the most famous of these quarries; exceeding 20
Category

2010s Modern Loose Gemstones

Materials

Tanzanite

Sapphire Gemstone Tennis Bracelet 20 Carat Eternity 14K September Birthstone 20
Located in Dearborn, MI
Sapphire Gemstones Each is Larger Than 7 x 5mm That's Over 20 Carats Perfect Gift for Any Occasion
Category

2010s Tennis Bracelets

Materials

Sapphire, 14k Gold, White Gold

20 Carat Blue Topaz Gemstone Diamond Gold Pendant Enhancer Fine Estate Jewelry
Located in Montreal, QC
Simply Beautiful! Finely detailed Custom Pendant Enhancer Necklace featuring a 20 Carat Blue Topaz
Category

1990s Modernist Necklace Enhancers

Materials

Diamond, Topaz, Blue Topaz, 18k Gold, Gold

Vintage 7.20 Carat Ruby Gemstones Bezel Set 1924 Liberty $20 Gold Coin Pendant
Located in Miami, FL
Vintage 7.20 Carat Ruby Gemstones Bezel Set 1924 Liberty $20 Gold Coin Pendant. The 1924 St
Category

Vintage 1970s Pendant Necklaces

Materials

Ruby, Gold, 14k Gold, 22k Gold

Vintage 20 Carat Garnet Gemstones Set Earrings, Ring and Pendant 14k Gold Italy
Located in Miami, FL
Vintage 20 Carat Garnet Gemstones Set Earrings, Ring and Pendant 14k Gold Italy. Beautiful and rare
Category

Vintage 1970s Italian Lever-Back Earrings

Materials

Garnet, 14k Gold, Yellow Gold

Vintage 15 Carat Marquise Multi Gemstones Necklace 14 Karat Gold
Located in Miami, FL
Vintage 15 Carat Marquise Multi Gemstones Figaro Link Necklace 14k Gold. The necklace weights
Category

Vintage 1970s Link Necklaces

Materials

Multi-gemstone, 14k Gold, Yellow Gold

Mardi Jo Cohen 1990 Memphis 20 Flatware Service in Sterling with Gemstones
Located in Miami, FL
composed by 20 pieces divided in 5 sets. Gemstones: Mounted in bezel settings, with round brilliant cuts
Category

Late 20th Century American Post-Modern Sterling Silver

Materials

Multi-gemstone, Silver, Sterling Silver

20 Carat Multi Shaped Diamond 18K Gold Bracelet
By EstatebyJR
Located in New York, NY
Details Type: Diamonds - 20 Carat Color: F Clarity: VS1 Weight: 20 Carats Metal Details 18K Gold
Category

21st Century and Contemporary Modern Link Bracelets

Materials

Diamond, Gold, White Gold, 18k Gold

Platinum Aster Floral Diamond Ring '1/20 Carat'
Located in San Francisco, CA
. Experience the difference! Product details: Center Gemstone Color: WHITE Side Gemstone Type: NATURAL
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

10k Gold Gemstone Circle Necklace Gemstone Options
By Oshi Jewels
Located in Bangkok, TH
Gemstone Circle Necklace is made of 10k solid gold available in three colors of gold and four
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

10k Gold, Rose Gold, White Gold, Yellow Gold

14k Gold Gemstone Circle Necklace Gemstone Options
By Oshi Jewels
Located in Bangkok, TH
Gemstone Circle Necklace is made of 14k solid gold available in three colors of gold and four
Category

21st Century and Contemporary Thai Modern Pendant Necklaces

Materials

14k Gold, Rose Gold, White Gold, Yellow Gold

Retro 20 Carat Coral & Diamond Cocktail Ring
Located in Santa Barbara, CA
- 1949 Metal: 18k Yellow & White Gold Center Gemstone: Natural Coral Carat Weight: 20 Carat Cut
Category

Vintage 1940s Retro Cocktail Rings

Materials

Coral, Diamond, 14k Gold, Yellow Gold

18 Karat White Gold Aster Floral Diamond Ring '1/20 Carat'
Located in San Francisco, CA
. Experience the difference! Product details: Center Gemstone Color: WHITE Side Gemstone Type: NATURAL
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, White Gold

14 Karat White Gold Aster Floral Diamond Ring '1/20 Carat'
Located in San Francisco, CA
. Experience the difference! Product details: Center Gemstone Color: WHITE Side Gemstone Type: NATURAL
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, White Gold

18 Karat Rose Gold Aster Floral Diamond Ring '1/20 Carat'
Located in San Francisco, CA
. Experience the difference! Product details: Center Gemstone Color: WHITE Side Gemstone Type: NATURAL
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Rose Gold

14 Karat Yellow Gold Aster Floral Diamond Ring '1/20 Carat'
Located in San Francisco, CA
. Experience the difference! Product details: Center Gemstone Color: WHITE Side Gemstone Type: NATURAL
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Yellow Gold

14 Karat Rose Gold Aster Floral Diamond Ring '1/20 Carat'
Located in San Francisco, CA
. Experience the difference! Product details: Center Gemstone Color: WHITE Side Gemstone Type: NATURAL
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Rose Gold

18 Karat Yellow Gold Aster Floral Diamond Ring '1/20 Carat'
Located in San Francisco, CA
. Experience the difference! Product details: Center Gemstone Color: WHITE Side Gemstone Type: NATURAL
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Yellow Gold

.925 Sterling Silver Orange Citrine and 1/20 Carat Diamond Tennis Bracelet
Located in New York, NY
weight is 1/20 ctw and each citrine measures 7x5 mm. 'Video Available Upon Request.' Product Features
Category

21st Century and Contemporary Indian Contemporary Tennis Bracelets

Materials

Diamond, White Diamond, Citrine, Sterling Silver

Rare Tacori Authentic Cognac Quartz Ring, 18k Rose Gold w 8 Carat Gemstone
By Tacori
Located in Austin, TX
ring are listed below: Metal Quality: Diamond Number: 20 Diamond Total Weight: .11 Carat Diamond
Category

21st Century and Contemporary American Artisan Cocktail Rings

Materials

Quartz, Diamond, 18k Gold, Gold, Sterling Silver, Rose Gold

Cober with bright Green 11.61 Carat Tourmaline 20 Diamonds White Gold Ring
By Vincent Cober
Located in OSS, NH
Green 11.61 Carat Tourmaline 20 Diamonds White Gold Ring The 18K white gold ring with a unique bright
Category

2010s Dutch Contemporary Cocktail Rings

Materials

Diamond, Tourmaline, White Gold

Blue Topaz Tennis Bracelet, 20 Carat Blue Topaz Bracelet in Sterling Silver
By Five Star Jewelry
Located in Austin, TX
mm Gemstone Weight: 20.25 Carat
Category

21st Century and Contemporary American Contemporary Tennis Bracelets

Materials

Topaz, Blue Topaz, Sterling Silver

Contemporary Multicoloured Gemstone Chevron Style Ring 22 Carat Yellow Gold
Located in Hamilton, AU
Forged in 22 carat yellow gold, this vibrant contemporary ring features a chevron-style front
Category

21st Century and Contemporary Unknown Contemporary Cluster Rings

Materials

Pearl, Yellow Sapphire, Pink Sapphire, Blue Sapphire, Emerald, Sapphire,...

Retro Deep Blue 20 Carat Cushion Aquamarine Cocktail Ring
Located in Santa Barbara, CA
Gemstone: Aquamarine Carat Weight: 20.75 Cut: Cushion Color: greenish Blue Clarity: Transparent Accent
Category

Vintage 1940s Retro Cocktail Rings

Materials

Aquamarine, Diamond, Platinum

.925 Sterling Silver Blue Topaz and 1/20 Carat Diamond Fashion Tennis Bracelet
Located in New York, NY
secure clasp. Total diamond weight is 1/20 ctw and each cushion cut blue topaz measures 7x7 mm. 'Video
Category

21st Century and Contemporary Indian Contemporary Tennis Bracelets

Materials

Diamond, White Diamond, Topaz, Blue Topaz, Sterling Silver

Boulder Opal Gold Earrings Triangle Australian Gemstone Rainbow gemstone
By Alexey Gabilo
Located in Berlin, DE
- 0.16 х 0.55 x 0.79 in / 4 х 14 х 20 mm opals weight - 14.40 carats earrings length - 1.57 in / 40 mm
Category

2010s French Art Nouveau Lever-Back Earrings

Materials

Opal, Gold, 14k Gold, Yellow Gold

15.3 Carat Ruby Hoop Earrings in 20 Karat Yellow Gold
By Coomi
Located in Secaucus, NJ
A stunning pair of Hoop earrings set in a rich 20 Karat Yellow Gold with an approximate 15.3cts
Category

21st Century and Contemporary Thai Art Deco Hoop Earrings

Materials

Ruby, Yellow Gold

Sterling Silver 20 Carat Citrine Three Stone Cocktail Ring for Women
Located in Houston, TX
Introducing our 20 Carat Citrine Three Stone Cocktail Ring! Crafted with exquisite detail in
Category

21st Century and Contemporary American Contemporary Cocktail Rings

Materials

Citrine, Silver, Sterling Silver

Important Emerald Pendant Necklace With Diamonds 20 Carats 18K White Gold
Located in Laguna Niguel, CA
It comes with the Gemological Appraisal by GIA GG/AJP All Gemstones are Natural Emerald = 9.80
Category

21st Century and Contemporary Contemporary Pendant Necklaces

Materials

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

20 Carat London Blue Topaz Earring in 18 Karat Gold with Diamonds and Pearls
By Sunita Nahata
Located in Hong Kong, HK
harmony to the mind, body and soul. This is a luxurious London blue topaz earring and this gemstone is
Category

21st Century and Contemporary Hong Kong Contemporary Dangle Earrings

Materials

Diamond, Pearl, Topaz, 18k Gold, White Gold

Gold bracelet with gemstones
Located in Amsterdam, NL
An 18 carat gold bracelet with round curb links and 6 oval facetted gemstones (aquamarine, citrine
Category

1990s Italian Link Bracelets

Materials

Amethyst, Tourmaline, Citrine, Aquamarine, 18k Gold, Gold

Gold bracelet with gemstones
Gold bracelet with gemstones
Free Shipping
W 0.36 in L 7.88 in
Real 1.82 Carat Oval Shape Tanzanite Gemstone Charm Pendant 18 Karat White Gold
By Spectrum Jewels
Located in IN
grams 18k White Gold Weight :- 1.97 grams Tanzanite Gemstone Weight :- 1.82 Carat Pendant Size :- 20 mm
Category

21st Century and Contemporary Indian Modern Pendant Necklaces

Materials

Tanzanite, 18k Gold, White Gold

20 Carat Heart Cut Aquamarine Wedding Bracelet in 925 Silver for Women
Located in Houston, TX
Beautifully handcrafted silver 20 Carat Heart Cut Aquamarine Wedding Tennis Bracelet, designed with
Category

21st Century and Contemporary American Modern Tennis Bracelets

Materials

Aquamarine, Silver, Sterling Silver

~20 Carat Colombian Emerald Cushion Cut GRS Certified and Diamond 18K Set
By Gad & Co.
Located in Miami, FL
Ring Center Stone: Gemstone Type: Colombian Emerald Carat: 7.60 carats Cut: Cushion Cut Color
Category

21st Century and Contemporary Cocktail Rings

Materials

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

20 Carats Blue Sapphire Cabs Gold Diamonds Pear Shape Chalcedony Drops Earrings
By Tutti Frutti Jewellery
Located in Bangkok, TH
6x8 mm and weighing 20 Carats set together in 14 Kt white gold with 2 small diamonds in the center
Category

2010s Thai Artisan Drop Earrings

Materials

Chalcedony, Blue Sapphire, Gold, 14k Gold, White Gold

4.63 Carat Black Onyx Gemstone Stud Earrings 18 Karat Rose Gold Handmade Jewelry
Located in IN
. :- 4.63 Ct. Earrings Size :- 20 mm approx. ✦ Sizing ..................... We can adjust most items to fit
Category

21st Century and Contemporary Indian Modern Stud Earrings

Materials

Onyx, 18k Gold, Rose Gold

Unisex 20 Carat GIA Cats Eye Alexandrite and Canary Diamond Ring
Located in METAIRIE, LA
approximately 20.00 carats securely set in four doubled split prongs. Chrysoberyl / Alexandrite is the only true
Category

Vintage 1980s Solitaire Rings

Materials

Diamond, Alexandrite, Chrysoberyl, 14k Gold, Yellow Gold, White Gold

20 Carats Natural Ruby Oval Cabochons 14 Kt Gold Bezel Stud Earrings
By Tutti Frutti Jewellery
Located in Bangkok, TH
Simple Chic Earrings made of 2 Natural Ruby Oval Cabochons measuring 11x 12 mm and weighing 20
Category

2010s Thai Contemporary Stud Earrings

Materials

Gold, 14k Gold

20 Carats Blue Sapphire Oval Cabs Gold Diamonds Pear Shape Jade Drops Earrings
By Tutti Frutti Jewellery
Located in Bangkok, TH
6x8 mm and weighing 20 Carats set together in 14 Kt white gold with 2 small diamonds in the center
Category

2010s Thai Contemporary Dangle Earrings

Materials

Diamond, Jade, Blue Sapphire, Gold, 14k Gold, White Gold

20 Carats Blue Sapphire Cabs Gold Diamonds Faceted Sky Blue Topaz Drops Earrings
By Tutti Frutti Jewellery
Located in Bangkok, TH
6x8 mm and weighing 20 Carats set together in 14 Kt white gold with 2 small diamonds in the center
Category

2010s Thai Contemporary Dangle Earrings

Materials

Diamond, Blue Sapphire, Topaz, Blue Topaz, Gold, 14k Gold

Top Quality Mix Chalcedoney & Chrysoprase Tumbled Natural Gemstone Necklace
Located in Jaipur, RJ
Top Quality Mix Chalcedoney & Chrysoprase Tumbled Natural Gemstone Necklace Size : 10 x 15 TO 20 x
Category

21st Century and Contemporary Unknown Beaded Necklaces

Materials

Chalcedony, Chrysophrase

20 Carats Blue Sapphire Oval Cabs Gold Diamonds Pear Shape Jade Drops Earrings
By Tutti Frutti Jewellery
Located in Bangkok, TH
6x8 mm and weighing 20 Carats set together in 14 Kt white gold with 2 small diamonds in the center
Category

2010s Thai Contemporary Dangle Earrings

Materials

Diamond, Jade, Blue Sapphire, Gold, 14k Gold, White Gold

20 Carats Blue Sapphire Oval Cabs Gold Diamonds Pear Shape Jade Drops Earrings
By Tutti Frutti Jewellery
Located in Bangkok, TH
6x8 mm and weighing 20 Carats set together in 14 Kt white gold with 2 small diamonds in the center
Category

2010s Thai Contemporary Dangle Earrings

Materials

Diamond, Jade, Blue Sapphire, Gold, 14k Gold, White Gold

Tanzanite Necklace 8.78 Carat Shield
By Merkaba
Located in Beverly Hills, CA
Striking 8.78 carat Tanzanite Shield, suspending from a 0.27 carat, E color/VS1 clarity, diamond
Category

21st Century and Contemporary American Modern Drop Necklaces

Materials

Diamond, White Diamond, Multi-gemstone, Tanzanite, Platinum

Arnaldo Pomodoro 1963 Milan Geometric Sculptural Necklace 18kt Gold Gemstones
By Arnaldo Pomodoro
Located in Miami, FL
security. The main element is embellished with 16 natural and not treated gemstones, described as follow
Category

Vintage 1960s Italian Artist Brooches

Materials

Ruby, Multi-gemstone, Emerald, Yellow Gold, White Gold, 18k Gold, Gold

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20 Carat Gemstones For Sale on 1stDibs

Find an expansive variety of 20 carat gemstones available on 1stDibs. Frequently made of Gold, 18k Gold and Yellow Gold, these items were constructed with great care. Our collection of these items for sale includes 41 vintage editions and 20 modern creations to choose from as well. Our inventory has long been popular, and it includes earlier versions that date to the 20th Century and newer variations that were made as recently as the 21st Century. Modern and Contemporary are consistently popular styles when it comes to 20 carat gemstones. There have been many well-made iterations of these items over the years, but those made by Merkaba, Sarosi By Timeless Gems and Tamir are often thought to be among the most beautiful. Any of these pieces can lend versatility to your look, but Diamond versions, from our inventory of 28, are particularly popular. A selection of oval cut, cushion cut and emerald cut can be found today on these pages. When shopping our range of 20 carat gemstones, you’ll find that there are less available pieces for men today than there are for women.

How Much are 20 Carat Gemstones?

Prices for 20 carat gemstones can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $279 and can go as high as $350,000, while 20 carat gemstones, on average, fetch $3,000.
Questions About 20 Carat Gemstones
  • 1stDibs ExpertApril 5, 2022
    The 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.