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GIA Certified .3 Carat Natural Red Ruby Diamond Gold Victorian Engagement Ring
Located in Stamford, CT
certified natural and no heat. Two nice old mine cut diamonds. Handmade Victorian ring 1 Oval 4.62 x 3.43 x
Category

Antique 1890s Engagement Rings

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold

Victorian Sapphire Rose Cut Diamond 3-Dimensnional Swan Brooch
Located in Narberth, PA
A magnificent sapphire and diamond swan pin from the Victorian (ca1880) era! Crafted in sterling
Category

Antique 1880s Victorian Brooches

Materials

Diamond, Sapphire, 15k Gold, Sterling Silver

Victorian 2.00 Total Carat Diamond Wing Pin
Located in Narberth, PA
An absolutely stunning diamond wing pin from the Victorian (ca1880) era! This spectacular piece is
Category

Antique 1880s Unknown Victorian Brooches

Materials

Diamond, 15k Gold, Yellow Gold, Sterling Silver

Victorian Diamond Riviere Antique Diamonds Cushion Cuts 27 carats
Located in Milano, IT
total weight of the diamonds is 27 carats featuring a large central Cushion diamond weighting approx 3
Category

20th Century European Victorian Chain Necklaces

Materials

Diamond, Gold, Silver

Victorian 1.25 Total Carat Diamond Flower Pin Pendant
Located in Narberth, PA
A beautiful diamond flower pin/pendant from the Victorian (ca1880) era! This exquisite sterling
Category

Antique 1880s Victorian Brooches

Materials

Diamond, 14k Gold, Sterling Silver

1880's Victorian 2.75 Carats Sapphire Diamond 18 Karat Rose Gold Antique Brooch
Located in Philadelphia, PA
and abdomen are set with old mine cut diamonds. Weighing in total approximately 1.85 carats - F to H
Category

Antique 1880s Victorian Brooches

Materials

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

Victorian GIA Certified Old European Cut Diamond 3-Stone Ring
Located in Beverly Hills, CA
Vintage 3-stone ring Victorian GIA certified, 2.43 carat F-I1 old European cut diamond ring with
Category

Early 20th Century European Victorian Three-Stone Rings

Materials

Diamond, White Diamond, Platinum

Victorian 6.45 Carat Sapphire 1.80 Carat Diamond Engagement Ring
Located in New York, NY
This is a stunning 14k pink gold engagement ring from the Victorian era. The ring is centered with
Category

20th Century Victorian Engagement Rings

Materials

Sapphire, 14k Gold

Victorian Diamond 9 Carat Gold Three-Stone Ring
Located in Chipping Campden, GB
The diamonds in this band total 24pts. The stones are all within the 9carat gold band. Ring Size
Category

Antique 1890s British Victorian Three-Stone Rings

Materials

Diamond, Gold

Victorian 3.00 Carat Aquamarine and Diamond Pendant Necklace
Located in Narberth, PA
A wonderful aqua and diamond pendant necklace from the Victorian (1880s) era! Crafted in 18kt
Category

Antique 1880s Unknown Victorian Pendant Necklaces

Materials

Aquamarine, Diamond, 18k Gold, Sterling Silver

Victorian Diamond and Sapphire 18 Carat Gold Band
Located in Chipping Campden, GB
This ring holds three sapphires which total 40pts and two diamonds totalling 30pts. These are set
Category

Antique 1890s British Victorian Band Rings

Materials

Diamond, Sapphire, Gold

Victorian 0.88 Carat Diamond 15k Yellow Gold Trilogy Ring
Located in Jesmond, Newcastle Upon Tyne
Content 0.88 carat Number of Diamonds 3 Dimensions Width of setting 7.28mm/0.29' Height of setting
Category

Antique 19th Century Victorian Three-Stone Rings

Materials

Diamond, Yellow Gold

Victorian Diamond 14 Karat Yellow Gold Boar Stickpin
Located in Philadelphia, PA
accented by a round brilliant cut diamond weighing 0.04 carat, eye-clean and white Tested as 14 karat gold
Category

Antique Early 1900s Victorian Brooches

Materials

Diamond, White Diamond, Gold, 14k Gold, Yellow Gold

Victorian 0.80 Total Carat Rose Cut Diamond Cluster Ring
Located in Narberth, PA
A lovely diamond cluster ring from the Victorian (ca1880) era! The mixed metals design combines a
Category

Antique 1880s Victorian Cluster Rings

Materials

Diamond, 18k Gold, Sterling Silver

4.50 Carat Natural 3 Prong Diamond Tennis Necklace 14K White Gold
Located in New York, NY
4.50 Carat Natural 3 Prong Diamond Tennis Necklace 14K White Gold 100% Natural Diamonds, Not
Category

2010s American Victorian Link Necklaces

Materials

Diamond, 14k Gold, White Gold

Victorian Era Antique 7 Carat Rose Cut Diamond Gold Pendant
Located in Chicago, IL
carats of sparkling rose cut diamonds of various shapes and sizes. The petals are separated by burgundy
Category

Antique Late 19th Century Victorian Drop Necklaces

Materials

Diamond

Victorian 1.25 Total Carat Rose Cut Diamond Starburst Locket
Located in Narberth, PA
An exquisite diamond starburst locket from the Victorian (ca1880) era! Crafted in 18kt yellow gold
Category

Antique 1880s Unknown Victorian Necklace Enhancers

Materials

Diamond, 18k Gold, Yellow Gold

Victorian Diamond Necklace
Located in Bethesda, MD
antique chain 155 diamonds with a total weight of 3 carats. True to the Victorian era, this necklace is
Category

Antique 1860s American Victorian Drop Necklaces

Materials

Diamond, 18k Gold, Sterling Silver

Victorian Rose Cut Diamond and 18 Carat Gold Cluster Ring
Located in Chipping Campden, GB
a simple 18carat gold band and the diamonds total approx 80pts. Ring Size: L or 5 3/4 Cluster
Category

Antique 1880s British Victorian Cluster Rings

Materials

Diamond, Gold

Victorian 14 Karat Gold 0.35 Carat Sapphire 0.18 Carat Diamond Three-Stone Ring
Located in Vilnius, LT
sapphire (oval cut, 0.35ct, B 6/3, P1) - 2 diamonds (rose cut, TW 0.18ct, STW-TW, P1-P2) Engraved “5 Juin
Category

Antique Late 19th Century Victorian Three-Stone Rings

Materials

Diamond, Sapphire, Gold, 14k Gold

Antique Victorian 14K Gold 0.82ct Old Cut Mine Diamond 3 Stone Gypsy Ring
Located in Montclair, NJ
--Stone(s):-- (1) Natural Genuine Diamond - Old Mine Cut - Burnish Flush Set - K/L Color - SI1
Category

Antique 1890s Victorian Band Rings

Materials

Diamond, 14k Gold

Victorian Black Enamel and Diamond Cluster Earrings 1.30 Total Carat
Located in Narberth, PA
A gorgeous pair of diamond earrings from the Victorian (1880s) era! Crafted in 14kt yellow gold
Category

Antique 1880s Unknown Victorian Drop Earrings

Materials

Diamond, 14k Gold, Enamel

Victorian French 2 Carat Rose Cut Diamond Star Pocket Watch
Located in Narberth, PA
An absolutely exquisite diamond pocket watch from the Victorian (1880s) era! French in origin, this
Category

Antique 1880s French Victorian Pocket Watches

Materials

Diamond, 18k Gold, Sterling Silver

Victorian French 2 Carat Rose Cut Diamond Star Pocket Watch
Victorian French 2 Carat Rose Cut Diamond Star Pocket Watch
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H 1.25 in D 0.5 in Dm 0.34 in
Victorian 1.10 Total Carat Old Mine Cut Diamond Dangle Earrings
Located in Narberth, PA
A stunning pair of diamond earrings from the Victorian (ca1880s) era! These beautiful earrings are
Category

Antique 1880s Unknown Victorian Dangle Earrings

Materials

Diamond, 14k Gold, Sterling Silver

Victorian 1.10 Total Carat Old Mine Cut Diamond Dangle Earrings
Victorian 1.10 Total Carat Old Mine Cut Diamond Dangle Earrings
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W 0.88 in D 0.19 in L 1.38 in
Victorian Ruby Diamond 14 Karat Yellow Gold Fireplace Bellow Stickpin
Located in Philadelphia, PA
appliquè while ribbon features rubies and diamonds Weighing collectively approximately 0.15 carat Tested
Category

Antique 1880s Victorian Brooches

Materials

Diamond, White Diamond, Ruby, Gold, 14k Gold, Yellow Gold

Victorian Carved Hardstone Diamond 18 Karat Gold Hellenistic Warrior Stickpin
Located in Philadelphia, PA
approximately 0.03 carat Stamped 18K for 18 karat gold Circa: 1890s Head measures: 1/2 x 3/4 inch Total
Category

Antique 1890s Victorian Brooches

Materials

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

Antique Old European Round Brilliant Cut Diamond Weights 3 Carats With a K Color
Located in Milano, MI
This Antique Old European Round Brilliant cut Diamond weights 3 carats with a K color (Beautiful
Category

20th Century Italian Late Victorian Loose Gemstones

Materials

Diamond

Antique Victorian 3 Stone Diamond Ring Trilogy 18k Yellow Gold Sz 4.75 Jewelry
Located in Torrance, CA
Stylish antique Victorian 3 stone diamond "Trilogy" ring (circa 1880s to 1900s) crafted in 18 karat
Category

Antique Late 19th Century American Victorian Three-Stone Rings

Materials

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

Antique Victorian Sapphire Diamond Love Knot Bracelet 15 Carat Gold
Located in Kendal, GB
total), Diamonds (2 x 2mm, approx. 0.05ct each – 0.10ct total) AGE: Victorian. (Circa 1880 – 1900
Category

Antique 1880s European Victorian Link Bracelets

Materials

Diamond, Sapphire, Gold, 15k Gold, Yellow Gold

Victorian 3 Petal Floral Diamond Earrings in 14Karat Chocolate Gold
Located in Honolulu, HI
Earrings Specifications: Metal: 14k Chocolate Gold Diamond Carat Weight: 0.12 carats Diamond
Category

Late 20th Century Unknown Modern Stud Earrings

Materials

Diamond, Gold, 14k Gold

18 Carat Gold and Diamond Victorian Band Ring
Located in Amsterdam, NL
An 18 carat gold band ring set with 5 old cut diamonds (app. 0.71 carat in total), London, England
Category

Vintage 1920s Art Deco Wedding Rings

Materials

Diamond, Gold, 18k Gold

1.10 Carat Old European Cut Diamond Tear Platinum Victorian Dangle Earrings
Located in Stamford, CT
Victorian era. 4 round diamonds approx. total weight 1.10cts, E to F, VS1 – SI1 Platinum Stamped & Tested
Category

Early 20th Century Dangle Earrings

Materials

Diamond, Platinum

Victorian Banded Agate Diamond Cufflinks
Located in Stamford, CT
carved into this pair of Victorian banded agate double cufflinks. Oval golden frames hold miniature
Category

Antique Late 19th Century British Victorian Cufflinks

Materials

Agate, Diamond, 15k Gold

Antique Victorian 14k Gold Cabochon Garnet & Old Mine Diamond 3 Stone Flush Ring
Located in Montclair, NJ
Victorian period, and features a classic three stone style with an oval cabochon garnet neatly set at the
Category

Antique 1890s Late Victorian Three-Stone Rings

Materials

Diamond, Garnet, 14k Gold, Yellow Gold

Victorian Dramatic Diamond Teardrop Earrings 7.26ctw
Located in Narberth, PA
Exquisite hanging diamond earrings from the Victorian (ca1880) era! These incredible teardrop
Category

Antique 1880s Victorian Drop Earrings

Materials

Diamond, 18k Gold, Sterling Silver

Antique Victorian Old Cut 0.75ct Diamond Cluster Daisy 18 Carat Gold Ring
Located in London, GB
Beautifully crafted in 18ct yellow gold, this exquisite antique Victorian Old Cut diamond cluster
Category

Antique 18th Century English Victorian Engagement Rings

Materials

Diamond, Gold

Mindi Mond Victorian 17.61 Carat Aquamarine Diamond Silver Gold Ring
By Mindi Mond
Located in New York, NY
-of-a-Kind Reconceived Victorian Aquamarine and Diamond Ring contains: 1 Transparent Greenish-Blue
Category

Antique Mid-19th Century North American Victorian Cocktail Rings

Materials

Gold, Silver

Victorian 18 Carat Yellow Gold and Diamond Buckle Ring, Chester, 1884
Located in Glasgow, GB
A Victorian 18 carat yellow gold and 0.30ct diamond buckle motif band ring. The ring is
Category

Antique 1880s British Victorian Band Rings

Materials

Diamond, 18k Gold, Yellow Gold

Victorian 24.50 Carats Amethyst Pearl 14 Kt Yellow Gold Cross Antique Necklace
Located in Philadelphia, PA
Featuring a cross pendant comprised of mixed emerald cut amethysts with a diamond shaped amethyst
Category

Antique 1890s Victorian Pendant Necklaces

Materials

Amethyst, Pearl, Gold, 14k Gold, Yellow Gold

Antique Victorian 2 Carat Diamond Earrings 14k Yellow Gold Drops Day Night
Located in Torrance, CA
rose cut diamond range in size from 0.01 to 0.30 carats and total an estimated 2 carats (estimated at L
Category

Antique Late 19th Century American Victorian Dangle Earrings

Materials

Diamond, White Diamond, Gold, 14k Gold, Yellow Gold

Victorian 1.82 Carats Ruby Diamond 14 Karat Yellow Gold Antique Cluster Ring
Located in Philadelphia, PA
Centering an oval cut ruby weighing approximately 1.22 carats - transparent medium purplish red
Category

Antique 1890s Victorian Cluster Rings

Materials

Diamond, White Diamond, Ruby, Gold, 14k Gold, Yellow Gold

Magnificent Antique GIA Cert 3.72 Carat Diamond Silver Gold Ring
Located in New York, NY
This gorgeous silver and gold ring from the Victorian era, centers a sparkling GIA certified old
Category

Antique 19th Century Victorian Three-Stone Rings

Materials

Diamond, Gold, Silver

1890's Victorian Guilloche Enamel Diamond Platinum 18 Karat Gold Portrait Ring
Located in Philadelphia, PA
single cut diamonds bead set in platinum with a milgrain edge Flanked by rose cut diamond accents at
Category

Antique 1890s Victorian Fashion Rings

Materials

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

900 Late Victorian Diamond 18 Karat Yellow Gold Devil Stickpin
Located in Philadelphia, PA
diamond eyes Total diamond weight is approximately 0.05 carat - eye clean and white Stamped 14K for 14
Category

Antique Early 1900s Late Victorian Brooches

Materials

Diamond, White Diamond, Gold, Yellow Gold, 14k Gold

Antique Georgian Floral Brooch Featuring 3 Carats DTW of Antique Diamonds
Located in Montgomery, AL
0.75 carats. The center diamond is an Old Mine cut. An Old Mine Cut is a very primitive diamond cut
Category

Antique Early 19th Century Georgian Brooches

Materials

White Diamond, Gold, 14k Gold, White Gold, Platinum, Sterling Silver

Antique Victorian Ruby 0.10 Carat Diamond 15 Karat Yellow Gold Vintage Brooch
Located in London, GB
Unusual and fine antique Victorian brooch handcrafted in 15 karat yellow gold composed of 3
Category

Antique Late 19th Century British Victorian Brooches

Materials

Diamond, Ruby, Gold, 15k Gold, Yellow Gold

GIA Certified 7.00 Carat Aqua Pearl Diamond Platinum Victorian Pendant Necklace
Located in Stamford, CT
1860's civil war era handmade aqua, pearl and diamond pendant necklace. 7.00ct oval, light blue
Category

Antique Mid-19th Century Pendant Necklaces

Materials

Aquamarine, Diamond, Pearl, Gold, 14k Gold, Yellow Gold, Platinum

Victorian Opal .8 Carat Old Mine Cut Diamond Ring Antique Wedding Engagement
Located in New York, NY
Cut Diamonds which total approximately .8 Carats. The jewels are set in 14 Karat Gold. This is the
Category

Antique 19th Century Unknown Victorian Wedding Rings

Materials

Diamond, Opal, Gold, 14k Gold, Yellow Gold

Antique Victorian Rose Cut Diamond Bangle Bracelet
Located in Montgomery, AL
weight of approximately 3 carats. The diamonds are antique rose cuts and each one was skillfully cut by
Category

Antique Mid-19th Century Victorian Bangles

Materials

Diamond, Gold, 18k Gold, Rose Gold

5.15 Carat Ruby Sapphire Diamond Opal Gold Silver Victorian Moth Brooch
Located in Stamford, CT
Mid 1880's Victorian moth Brooch. Set with rubies, diamonds, sapphires and opals in a 11-12 yellow
Category

Antique Late 19th Century Brooches

Materials

Sapphire, Blue Sapphire, Diamond, Opal, Ruby, Gold, Silver, Yellow Gold

Victorian 0.50 Carat Opal and 0.33 Carat Diamond 18k Yellow Gold Dress Ring
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive antique 0.50 carat opal and 0.33 carat diamond, 18 karat yellow gold dress
Category

Antique 1890s Cocktail Rings

Materials

Diamond, Opal, Yellow Gold, Silver

Victorian 1.68 Carat Old European Cut Diamond Turquoise 18 Karat Gold Ring
Located in Philadelphia, PA
navette shaped surround featuring clustered old European cut diamonds. Weighing approximately 1.68 carats
Category

Antique 1890s Victorian Cocktail Rings

Materials

Diamond, Turquoise, Gold, 18k Gold, Yellow Gold

Victorian Pink Topaz and Diamond Pendant
Located in Hummelstown, PA
This gorgeous Victorian jewel centers on a 4.8 carat pastel pink topaz flower with glittering rose
Category

Antique 1880s Unknown Victorian Pendant Necklaces

Materials

Diamond, Topaz

Victorian Pink Topaz and Diamond Pendant
Victorian Pink Topaz and Diamond Pendant
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W 1.38 in D 0.5 in L 2 in
Victorian Mine Cut Diamond Cluster Ring
Located in Narberth, PA
A beautiful diamond cluster ring from the Victorian (ca1880) era! This charming ring is crafted in
Category

Antique 1880s Victorian Cluster Rings

Materials

Diamond, 14k Gold

7 Carat Peridot Platinum Diamond Lavaliere Necklace Antique Victorian Edwardian
Located in New York, NY
This is a stunning antique Victorian - Edwardian Peridot Platinum Diamond Lavaliere Pendant
Category

Early 20th Century Unknown Edwardian Pendant Necklaces

Materials

Diamond, Peridot, Platinum

Victorian Diamond Gold Silver Chick Brooch
Located in Greenwich, CT
This magical Victorian diamond gold silver brooch is no chicken feed. With three adorable diamond
Category

Antique 1870s Victorian Brooches

Materials

Diamond, Gold, Silver

Victorian Turquoise and Rose Cut Diamond 9 Carat Gold Cluster Locket Back Ring
Located in Chipping Campden, GB
cluster. Sat on top of the swirling detail is a cluster of five bright turquoise and a rose cut diamond at
Category

Antique 1880s British Victorian Cluster Rings

Materials

Turquoise, Diamond, Gold

Victorian 14K Gold Silver Antique 5 Carat Diamond Bracelet US 7.25 Inch 18.9 gr
Located in Santa Monica, CA
Victorian 14K Gold Silver Antique 5 Carat Diamond Bracelet 18.9 gr 7.25 inch 4 panels of 11
Category

Antique 1880s American Victorian Beaded Bracelets

Materials

Diamond, 14k Gold, Silver

Victorian 0.80 Carat Old Mine Cut Diamond Natural Pearl 18 Karat Gold Ring
Located in Philadelphia, PA
. Featuring a clustered surround of old mine cut diamonds. Weighing approximately 0.80 carat total. H/I color
Category

Antique 1860s Victorian Cluster Rings

Materials

Diamond, White Diamond, Natural Pearl, 18k Gold, Yellow Gold, Gold

Victorian Style Apx 7.40ct Rose Cut Diamond Drop Earrings
Located in BEVERLY HILLS, CA
Statement Victorian inspired drop earrings. Vintage high jewelry. Approximately 7.40 carats total
Category

Vintage 1950s Unknown Victorian Drop Earrings

Materials

Diamond, Gold, Silver

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Victorian 3 Carat Diamond For Sale on 1stDibs

Find the exact victorian 3 carat diamond you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using gold, 18k gold and yellow gold. In our selection of items, you can find a vintage example as well as a contemporary version. If you’re looking for a victorian 3 carat diamond from a specific time period, our collection is diverse and broad-ranging, and you’ll find at least one that dates back to the 18th Century while another version may have been produced as recently as the 21st Century. Finding an appealing victorian 3 carat diamond — no matter the origin — is easy, but Roshe Jewels, DGI and Gems Paradise each produced a popular version that is worth a look. See these pages for an old european cut iteration of this accessory, while there are also old mine cut cut and round cut cut versions available here, too. When shopping for a victorian 3 carat diamond, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Victorian 3 Carat Diamond?

Prices for a victorian 3 carat diamond can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $100 and can go as high as $300,000, while this accessory, on average, fetches $3,868.

A Close Look at victorian Jewelry

The reign of Queen Victoria encapsulates a quickly evolving period of history — and jewelry styles were no exception. No single period has seen such a diverse group of jewelry attributed to it than the Victorian era. Today, there is a vast collection of authentic antique Victorian jewelry and watches on 1stDibs.

Victorian jewelry is named after Queen Victoria, whose reign lasted from 1837 to 1901, making her the second longest-ruling monarch. (She was surpassed by Queen Elizabeth II in 2015.) During this time, different styles of fashion and jewelry came and went. Thanks to our fascination with royalty and swoon-worthy melodramas like Netflix’s The Crown — which is rife with evocative fashion, jewelry and interiors — and the 2017 feature film Victoria & Abdul, we are all familiar with her story. After the death of Victoria’s father and three childless uncles, she ascended to the throne at age 18. In 1840, Queen Victoria married the love of her life, her first cousin Prince Albert of Saxe-Coburg and Gotha.

Queen Victoria loved serpentine jewels, and she had even more power to shape trends than Kate Middleton and Meghan Markle do today. The British monarch’s best-known piece in this mold is the gold coiled-snake engagement ring she received from Prince Albert — the sinuous reptile was considered a symbol of everlasting love.

The Queen's 63-year reign has been divided by historians into the Romantic period, the early happy years, circa 1837–60; the Grand period, marked by the deaths of the Queen’s mother and husband, circa 1860–80; and the late Victorian or Aesthetic period, which lasted from about 1880 until 1901 and ushered in the Belle Époque. Queen Victoria wore her heart on her sleeve, and her fashion and jewelry reflected her emotions.

Romantic period jewelry, which featured common decorative motifs and was embellished with seed pearls, coral and turquoise, was a celebration of the young monarch’s love. Everything changed with the death of Prince Albert, and the Grand period is most often associated with mourning jewelry. Jewelry was smaller, lighter and more dainty during the late Victorian period. During this era, diamonds came into fashion, and semiprecious gems such as amethysts and opals became prevalent, too. Using gemstones for their natural beauty and not their worth was something that jewelers of the era felt passionate about, and this ideology would really become relevant in Art Nouveau jewelry.

Find a collection of authentic antique Victorian jewelry — from rings, necklaces and brooches to a range of other accessories — on 1stDibs. 

Questions About Victorian 3 Carat Diamond
  • 1stDibs ExpertSeptember 28, 2021
    A 3-carat diamond’s worth varies depending on the 4Cs of diamond quality – color, cut, clarity and carat. On average, a 3-carat diamond could cost you between $7,200 to $51,000. It is also likely that the price range per carat will be even broader. On 1stDibs, you can find a variety of 3-carat diamond jewelry today.
  • 1stDibs ExpertFebruary 27, 2024
    In terms of dimensions, how large a 3-carat diamond is varies. The shape of the diamond will determine its length and width. Weighing 600 milligrams, diamonds that are 3 carats are generally considered to be large stones. On 1stDibs, shop a large collection of diamond jewelry from some of the world's top dealers.
  • 1stDibs ExpertFebruary 13, 2023
    Whether a 3-carat diamond is considered big is largely a matter of personal opinion. The average diamond is 1 to 2 carats in size. On 1stDibs, shop a selection of diamond jewelry.