12 Carat Round Brilliant
to
35
172
69
66
89
59
175
49
44
25
17
3
62
127
1
1
6
3
8
4
5
130
63
57
36
15
12
11
to
11
8
7
5
5
35
29
12
9
7
4
4
3
192
1
175
11
Sort By
12 Carat Round Brilliant Cut Natural Diamonds Set in a 14 Karat Gold Bracelet
Located in Houston, TX
12 Carat total weight round brilliant cut natural diamonds set in a 14K yellow gold bracelet. Box
Category
2010s American Link Bracelets
Materials
Diamond, 14k Gold, Gold
Ravishing 18k Yellow Gold Bracelet w/ 12 ct Natural Diamond IGI Certificate
Located in רמת גן, IL
A luxurious gold tennis bracelet with ideal cut round brilliant diamonds in 12-carat round
Category
2010s Israeli Tennis Bracelets
Materials
Diamond, 18k Gold, Yellow Gold
14K Yellow Gold Nugget Style Emerald & Diamond Ring 16.8g
Located in Laguna Beach, CA
16.8 grams.
The emerald is a light green, cabochon cut, 9 x 8.8x 3.9mm.
The diamond is a .12 carat
Category
Late 20th Century Cocktail Rings
Materials
Diamond, Emerald, 14k Gold, Yellow Gold
12 Carat White Brilliant Cut Tennis Diamond Bracelet
By Antinori Fine Jewels
Located in Chicago, IL
Indulge in the timeless allure of our exquisite 12-carat White Gold Round Brilliant Cut Diamond
Category
2010s Italian Modern Tennis Bracelets
Materials
Diamond, White Diamond, White Gold
12 Carat White Brilliant Cut Tennis Diamond Bracelet
By Antinori Fine Jewels
Located in Chicago, IL
Tennis Bracelet with 12.66 carat ROUND cut diamonds in Platinum (0.30ct each)
Diamond Signature
Category
2010s Italian Modern Tennis Bracelets
Materials
Diamond, White Diamond, 14k Gold, White Gold
1.80 Carat Round Brilliant Diamond 12-16MM Citrine 18K YG Charm Necklace
Located in New York, NY
Title:
1.80 Carat Round Brilliant G VS Diamond 1.00 Carat Emerald Cut Citrine 18 Karat Yellow Gold
Category
20th Century Pendant Necklaces
Materials
Citrine, Diamond, 18k Gold, Yellow Gold
$24,050
H 0.3 in W 0.33 in L 16 in
12 Carat SI/H Round Brilliant Cut Diamond Tennis Bracelet 18 Karat Rose Gold
By Spectrum Jewels
Located in Diera, Dubai
FOLLOW SPECTRUM JEWELS storefront to view the latest collection & exclusive pieces. Spectrum Jewels is proudly rated as a Top Seller on 1stdibs with 5 star customer reviews. All item...
Category
21st Century and Contemporary Indian Modern Tennis Bracelets
Materials
Diamond, 18k Gold, Rose Gold
$13,551 Sale Price
25% Off
L 7 in
3.78 Carat Round Brilliant 12 Diamond 3/4 Wedding Band 14 Karat In Stock
Located in Boca Raton, FL
14k White Gold 3.78ctw Round Brilliant 12 Diamond 3/4 Wedding Band
Style: Women's Round Brilliant
Category
21st Century and Contemporary American Band Rings
Materials
Diamond, Gold, 14k Gold, White Gold
12 Carat Natural Diamond Tennis Bracelet Elegant and timeless
By Antinori Fine Jewels
Located in Chicago, IL
Weight: Approx. 12 Carats
Diamond Shape: Round Brilliant Cut
Diamond Color/Clarity: SI-I / Near
Category
2010s American Contemporary Tennis Bracelets
Materials
Diamond, White Gold, 14k Gold
12 Carat 'Tennis Bracelet' White Diamond Eternal : A Circle of Endless Sparkle
By Malpani Jewels
Located in Hung Hom, HK
in luxurious 18k white gold, this bracelet features an impeccable 12 carats of meticulously matched
Category
2010s Hong Kong Art Nouveau Tennis Bracelets
Materials
White Diamond, 18k Gold
1 Carat Diamond Engagement Ring, White Gold, Round, Vintage, Detailed
By Five Star Jewelry
Located in Austin, TX
Diamond Weight: .92 Carats
Side Diamond: .12 Carats
Main Diamond Shape: Round Brilliant
Ring Size: 6
Category
21st Century and Contemporary American Modern Engagement Rings
Materials
Diamond, 14k Gold, White Gold, Gold
$5,599 Sale Price / item
20% Off
1.47 Carat Emerald With Round and Baguette Cut Diamond 14K Gold Statement Ring
Located in Miami, FL
1.47 Carat Emerald with Round & Baguette Cut Diamond Side Stones 14K Yellow Gold Statement Ring in
Category
21st Century and Contemporary Art Deco Cocktail Rings
Materials
Diamond, Emerald, Gold, 14k Gold, Yellow Gold
Tiffany & Co. Platinum Round, Marquise & Pear Diamond Dangle Earrings
By Tiffany & Co.
Located in Chicago, IL
. 2.20 carats
14 marquise-shaped diamonds totaling approx. 2.10 carats
12 round brilliant diamonds
Category
2010s American Dangle Earrings
Materials
Diamond, White Diamond, Platinum
Diamond Drop Earrings 4.35 Carat 18 Karat White Gold
By Harbor Diamonds
Located in New York, NY
18K White gold drop earrings featuring 170 round brilliants weighing 2.41 carats and 12 round
Category
2010s American Contemporary Drop Earrings
Materials
Diamond, White Gold
.57 Carat Diamond Yellow Gold Infinity Engagement Ring
Located in Stamford, CT
.
1 round brilliant cut L VS Diamond, Approx. .52 carat
12 round brilliant cut H-I VS diamonds, Approx
Category
Late 20th Century Engagement Rings
Materials
Diamond, Gold, 14k Gold, Yellow Gold
5.00 Carat Diamond Fashion Ring
Located in Beverly Hills, CA
weighing an estimated 3.00 carats in total. 12 round brilliant yellow diamonds weigh an estimated 2.00
Category
21st Century and Contemporary Unknown Modern Cluster Rings
Materials
Diamond, White Diamond, Yellow Diamond, 18k Gold, White Gold, Yellow Gold
AGL Certified No Heat Oval Cut Burma Ruby and Round Diamond Ring
Located in Miami, FL
~3.00 carats (12 pc) Round-Brilliant Cut Diamonds
✔ Era: Art Deco (1915-1930)
✔ Diamonds Cut: Round
Category
Early 20th Century Burmese Art Deco Cocktail Rings
Materials
Diamond, White Diamond, Ruby, 18k Gold, White Gold, Platinum
Vintage 1950s 6.21 Carat Ceylon Sapphire and Diamond Cluster Ring
Located in New York, NY
Sapphire weighing 6.21 carats, and 12 Round brilliant cut Diamonds weighing approximately a total of 1.50
Category
Vintage 1950s Cocktail Rings
Materials
Diamond, Sapphire, 18k Gold, Platinum
GIA Certified 1.00 Carat Diamond Rose Gold engagement Ring
Located in New York, NY
color and SI2 Clarity.
Diamond is set within 12 round brilliant diamonds 0.30 Carat Total Diamond
Category
2010s American Art Deco Engagement Rings
Materials
Diamond, 18k Gold, Rose Gold
2.87 Carats Diamond White Gold Halo Tennis Bracelet in 14K
Located in NEW YORK, NY
This gorgeous bracelet features 12 Big Round Brilliant Diamonds weighing 2.87 carats , 12 Small
Category
21st Century and Contemporary American Tennis Bracelets
Materials
Diamond, 14k Gold, White Gold
Tahitian Pearl Diamond Deco Inspired Drop Earrings 1.37 Carats 18K White Gold
By Harbor Diamonds
Located in New York, NY
, 0.78 carats, and 10 round brilliants weighing 0.59 carats.
Pearls can be changed to South Sea, Pink
Category
2010s American Contemporary Drop Earrings
Materials
Diamond, Pearl, White Gold
$3,692 Sale Price
24% Off
L 2 in
1981 Classic Collection Ring: 0.48 Carat Diamonds in 14k White Gold
Located in Paramus, NJ
of 0.48 carats, showcasing 12 brilliant round diamonds set in a classic prong setting.
Gold Purity
Category
21st Century and Contemporary Hong Kong Modern Band Rings
Materials
Diamond, 14k Gold, White Gold
1981 Classic Collection Ring: 0.48 Carat Diamonds in 14k Rose Gold
Located in Paramus, NJ
of 0.48 carats, showcasing 12 brilliant round diamonds set in a classic prong setting.
Gold Purity
Category
21st Century and Contemporary Hong Kong Modern Band Rings
Materials
Diamond, 14k Gold, Rose Gold
1981 Classic Collection Ring: 0.48 Carat Diamonds in 14k Yellow Gold
Located in Paramus, NJ
of 0.48 carats, showcasing 12 brilliant round diamonds set in a classic prong setting.
Gold Purity
Category
21st Century and Contemporary Hong Kong Modern Band Rings
Materials
Diamond, 14k Gold, Yellow Gold
Pink Sapphire Amethyst Freshwater Pearl Drop Earrings 3.40 Carat 18 Karat Gold
By Harbor Diamonds
Located in New York, NY
carats, 68 round brilliants, 0.26 carats with two Pink Freshwater Pearls measuring 13-14 mm.
Category
2010s American Contemporary Drop Earrings
Materials
Amethyst, Diamond, Freshwater Pearl, Pink Sapphire, White Gold
Vintage 6.66 carat tanzanite diamond platinum cocktail ring
Located in Beverly Hills, CA
cut tanzanite
Weight: 6.66 carats
Accent stone: 12 round brilliant and two pear cut diamonds
Weight
Category
Vintage 1980s Modern Cocktail Rings
Materials
Diamond, Tanzanite, Platinum
Large 23 Carat Vining Flowers Yellow Sapphire, Diamond and Tsavorite 18K Brooch
Located in Tustin, CA
brilliant golden yellow sapphires have a combined approximate total weight of 12 carats.
Approximately 63
Category
20th Century American Artisan Brooches
Materials
Diamond, Yellow Sapphire, Tsavorite, 18k Gold, White Gold, Yellow Gold
$15,600 Sale Price
20% Off
W 2.21 in D 0.52 in L 4.54 in
Vintage 9.77 carat cabochon opal diamond platinum cocktail ring
Located in Beverly Hills, CA
by 12 round brilliant cut diamonds totaling 0.21 carats, H color, VS-SI clarity. A bold yet elegant
Category
Vintage 1980s Modern Cocktail Rings
Materials
Diamond, Opal, Platinum
2.45 Carat Brown Diamond Platinum 14K White Gold Cocktail Ballerina Ring
Located in New York, NY
, and 12 round brilliant cut diamonds, weighing approximately 0.60 carat total. All the diamonds are
Category
Early 20th Century Cocktail Rings
Materials
Brown Diamond, Diamond, White Gold, Platinum
5.35 Carat Rubellite Tourmaline and Diamond Band Ring in 18k Yellow Gold
By Sarosi By Timeless Gems
Located in Los Angeles, CA
round brilliant cut diamonds, .10 carats total
Ring size 7
Complimentary sizing as needed
Category
21st Century and Contemporary American Artisan Band Rings
Materials
Diamond, Tourmaline, Rubelite, 18k Gold, Yellow Gold, Gold
1.50 Carat Fancy Green Diamond Drop Earrings, GIA Certified 18 Karat Gold
Located in New York, NY
Certified in the center. Surrounded with 12 rose-cut white diamonds totaling in 2.16 carat and 12 Pink round
Category
2010s American Art Deco Drop Earrings
Materials
Diamond, White Diamond, Pink Diamond, 18k Gold, Gold, Rose Gold
Retro 2 carat total weight sapphire diamond 18k gold cocktail ring
Located in Beverly Hills, CA
: 4 tapered baguette cut blue sapphires
Weight: Approximately .70 carats
Accent stone: 12 round
Category
Vintage 1940s Retro Cocktail Rings
Materials
Diamond, Sapphire, Gold, 18k Gold, White Gold, Yellow Gold
8.03 Carat Emerald-Cut Boucheron "Laperouse" Briolette GIA Diamond Ring
By Boucheron
Located in Miami, FL
Ring: 18K, 3.29 Carats Briolette-Cut Diamonds (12 pcs), 1.65 Carats Round-Brilliant Cut Diamonds (94
Category
21st Century and Contemporary French Modern Cocktail Rings
Materials
Diamond, White Diamond, Gold, 18k Gold, White Gold
Certified 2.05 Carat Natural Burmese Ruby and Diamond Ring Made in Gold
Located in Bangkok, Thailand
Carats
Diamond Round Brilliant : 78 Pieces / 0.59 Carats.
Natural Ruby Burma : 1 / 2.05 Carats
The ring
Category
2010s Modern Cocktail Rings
Materials
Diamond, Ruby, Gold
14 Karat White Gold 10.86 Carat Kunzite and Diamond Halo Ring
Located in Cape May, NJ
Accent Stone: (12) Round Brilliant Cut Diamonds
Carat Weight: Approximately .37 Carats
Color: G/H
Category
2010s Engagement Rings
Materials
Diamond, Kunzite, 14k Gold, White Gold
Boucheron "Laperouse" 8.03 Carat Emerald Cut G VS1 GIA Certified Diamond Ring
By Boucheron
Located in Miami, FL
Ring: 18K, 3.29 Carats Briolette-Cut Diamonds (12 pcs), 1.65 Carats Round-Brilliant Cut Diamonds (94
Category
21st Century and Contemporary French Modern Cocktail Rings
Materials
Diamond, White Diamond, Gold, 18k Gold, White Gold
Gubelin 4 Carat Cats Eye and Diamond 18 Karat Yellow Gold Lady's Ring
By Gubelin
Located in Bay Harbor Islands, FL
Ladies chrysoberyl cats eye weighing approximately 4 carats, surrounded by 12 round brilliant cut
Category
Vintage 1970s Unknown More Rings
Materials
Chrysoberyl, Diamond, 18k Gold
White Keshi Pearl South Sea 18K Yellow Gold Diamond Cluster Earrings
By Valentin Magro
Located in New York, NY
diamond. 18kt yellow gold sets the pattern. The total weight is 0.88 carats of 12 round brilliant cut
Category
2010s American Clip-on Earrings
Materials
Diamond, White Diamond, Pearl, Freshwater Pearl, Natural Pearl, South Se...
$21,590 / set
W 0.97 in D 0.66 in L 0.97 in
Viberant Sapphire Diamond 18K Ombre Link Tennis Bracelet
Located in Miami, FL
sapphires in a beautiful ombre arrangement, totaling 9.60 carats, and 12 brilliant round diamonds, totaling
Category
21st Century and Contemporary American Modern Tennis Bracelets
Materials
Diamond, Sapphire, 18k Gold
TIFFANY & Co. Etoile 18K Gold Diamond Twist Ring 7
By Tiffany & Co.
Located in Los Angeles, CA
widest point
Weight: 9.30 grams
Diamond: 12 round brilliant diamonds, carat total weight .27
Hallmark
Category
2010s American Band Rings
Materials
Diamond, 18k Gold, Platinum
TIFFANY & Co. Etoile 18K Gold Diamond Twist Ring 6.5
By Tiffany & Co.
Located in Los Angeles, CA
the widest point
Weight: 8.40 grams
Diamond: 12 round brilliant diamonds, carat total weight .27
Category
2010s American Band Rings
Materials
Diamond, 18k Gold, Platinum
Harry Winston Diamond Brooch in Platinum
By Harry Winston
Located in New York, NY
diamonds with total weight of 12.72 carats, 12 round brilliant cut diamonds with total weight of 2.73
Category
Mid-20th Century American Artist Brooches
Materials
Diamond, Platinum
Bochic “Orient” Elephant Brooch, Sapphire, Emerald & Set In 18K Gold & Silver
By Bochic
Located in New York, NY
, round brilliant shapes, micro pave setting, Sapphires from Sri Lanka - 12 Carats
Natural Green Emeralds
Category
21st Century and Contemporary Thai Baroque Brooches
Materials
Emerald, Sapphire, Blue Sapphire, Yellow Sapphire, 18k Gold, Gold Plate,...
$1,016 Sale Price
46% Off
18K Yellow Gold Lapis and White Coral Bangle Bracelet with Diamond Accents
By Valentin Magro
Located in New York, NY
weight is 48.52 carats of lapis lazuli and coral as well as 0.77 carats of 12 round brilliant cut
Category
2010s American Bangles
Materials
Coral, Diamond, Lapis Lazuli, Gold, 18k Gold, Yellow Gold
$38,390
H 1.75 in W 2.25 in D 2.5 in
18K Yellow Gold Blue Topaz and Kunzite Bangle Bracelet with Diamond Accents
By Valentin Magro
Located in New York, NY
total weight is 0.56 carats of 12 round brilliant cut diamonds of F.G. color and VS2 clarity and a
Category
2010s American Bangles
Materials
Diamond, Kunzite, Topaz, Blue Topaz, Gold, 18k Gold, Yellow Gold
$35,300
H 1.375 in W 2.625 in
Wedding Band 1981 Classic Collection Ring: 0.5 ctw Diamond in 14K White Gold
Located in Paramus, NJ
total carat weight of 0.5 carats, showcasing 12 brilliant round diamonds set in a classic prong setting
Category
21st Century and Contemporary Hong Kong Modern Band Rings
Materials
Diamond, 14k Gold, White Gold
Wedding Band 1981 Classic Collection Ring: 0.5 ctw Diamond in 14K Yellow Gold
Located in Paramus, NJ
total carat weight of 0.5 carats, showcasing 12 brilliant round diamonds set in a classic prong setting
Category
21st Century and Contemporary Hong Kong Modern Band Rings
Materials
Diamond, 14k Gold, Yellow Gold
Wedding Band 1981 Classic Collection Ring: 0.5 ctw Diamond in 14K Rose Gold
Located in Paramus, NJ
features a total carat weight of 0.5 carats, showcasing 12 brilliant round diamonds set in a classic prong
Category
21st Century and Contemporary Hong Kong Modern Band Rings
Materials
Diamond, 14k Gold, Rose Gold
Contemporary Sapphire & Diamond Pendant Necklace
Located in Montgomery, AL
Carat
12 - 2.5mm Round Brilliant Cut Diamonds; GH Color; SI Clarity; Estimated Combined Weight: 0.6
Category
20th Century Contemporary Pendant Necklaces
Materials
Diamond, Sapphire, Gold, 14k Gold, White Gold, Platinum
Lennox 18k Yellow Gold Necklace – .08 ctw Baguette Diamonds
Located in Greeneville, TN
baguette diamonds with .12 carats of brilliant round diamonds, creating a delicate dance of shape and shine
Category
21st Century and Contemporary North American Art Deco Pendant Necklaces
Materials
Diamond, Yellow Gold
1ctw Pink Tourmaline & Diamond Ring, 14k Yellow Gold, Ring Size 5.75
Located in McLeansville, NC
Stones:
pink tourmaline, 1 stone
oval cut
7 x 5 mm
approximately 1 carat
diamonds, 12 stones
round
Category
21st Century and Contemporary Fashion Rings
Materials
Diamond, Tourmaline, 14k Gold, Yellow Gold
Illusion Cut Green Tourmaline and Diamond Ring in 18k Yellow Gold
By Sarosi By Timeless Gems
Located in Los Angeles, CA
!
Ring measures approximately 3/4" in length and 1/2" in width.
12.55 x 7.33mm, 5.44 carats
12 round
Category
21st Century and Contemporary North American Artisan Cocktail Rings
Materials
Diamond, Tourmaline, Gold, 18k Gold, Yellow Gold
Ruby and Diamond Dome Ring in Two Tone Gold
Located in Coral Gables, FL
Approximately 0.85 Carats Surrounded by 12 Round Brilliant Cut Diamonds of VS Clarity and G/H Color Totaling
Category
Mid-20th Century Dome Rings
Materials
Diamond, Ruby, Gold, 18k Gold
Retro Ruby and Diamond Ring Circa 1940's in 18k Rose Gold
Located in Wailea, HI
.50 Carats Approximately
12 Round Brilliant Cut Diamonds Weighing .35 Carats Approximately all
Category
Early 20th Century Unknown Retro Cocktail Rings
Materials
Diamond, Ruby, 18k Gold
1970s Tiffany & Co. Emerald and Diamond 18k Yellow Gold Earrings
By Tiffany & Co.
Located in Miami, FL
Round-Brilliant Cut Diamonds totaling 12-13 Carats, and set in lush 18K Yellow Gold. These stunning
Category
20th Century American Retro Drop Earrings
Materials
Diamond, Emerald, White Diamond, 18k Gold, Yellow Gold, Gold
Anniversary Wedding Ring Natural Fancy Vivid Deep Yellow Marquise Diamonds .28ct
Located in Dearborn, MI
Diamond Carat Weight
Shape: Round Brilliant
Color: D-GF (Near Colorless)
Clarity: VVS-VS (No Visible
Category
2010s Wedding Rings
Materials
Diamond, 14k Gold, White Gold
Anniversary Ring Natural Fancy Vivid Deep Yellow Marquise Diamonds .28ct 14K
Located in Dearborn, MI
Diamond Carat Weight
Shape: Round Brilliant
Color: D-G (Near Colorless)
Clarity: VVS-VS (No Visible
Category
2010s Wedding Rings
Materials
Diamond, 14k Gold, Yellow Gold
- 1
Get Updated with New Arrivals
Save "12 Carat Round Brilliant", and we’ll notify you when there are new listings in this category.
More Ways To Browse
Kanaris Jewelry
Chris Correia
Morganite 25 Carat Ring
Sea Urchin Brooch
Seaman Schepps Pins
Secessionist Jewelry
Semi Precious Stones Flowers
Sergio Bustamante Jewelry
Serpentine Bangle
Sherman Vintage Jewellery
Signet Fob
Silver Pocket Watch Chain
Snail Pin
Solid Gold Purse
Solje Brooch
Songea Sapphire
Sorority Pin
Sorority Pins Vintage