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3 Carat Round Ring Platinum

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3 Carat Round Brilliant Cut Diamond Platinum Ring
By Antinori Fine Jewels
Located in Rome, IT
ring, weighing 3 grams and sized at 7, features a striking centerpiece: a Natural Round Brilliant Cut
Category

2010s Italian Contemporary Three-Stone Rings

Materials

Diamond, Platinum

GIA Certified 3 Carat Round Cut Diamond Platinum Ring
By Antinori Fine Jewels
Located in Rome, IT
Embrace the unparalleled allure of this exquisite GIA certified 3 carat round cut diamond platinum
Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

3 Carat Round Diamond Engagement Ring in Platinum
By Hannah Florman
Located in Boston, MA
Customizable diamond engagement ring, shown with a GIA certified 3 carat round briliant diamond
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co. 3 Carat Round Brilliant Cut Diamond Platinum Ring
By Tiffany & Co.
Located in Rome, IT
Tiffany & Co. 3.08 ct Platinum Round Brilliant Cut Diamond Solitaire Engagement Ring. The ring
Category

2010s American Modern Engagement Rings

Materials

Diamond, Platinum

Platinum Shayna Petite Design Round Diamond Ring 'Center 1/3 Carat'
Located in San Francisco, CA
This petite handcrafted earthy, organically designed ring features a 1/3 carat center round cut
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

GIA Certified 3 Carat Round Cut Diamond Platinum Ring
By Antinori Fine Jewels
Located in Rome, IT
diamond encrusted setting, this ring is a head turner! Highlights: - Large 3.05 carat center diamond
Category

2010s Italian Modern Engagement Rings

Materials

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

Tiffany & Co. IDEAL CUT 3 Carat Round Brilliant Cut Diamond Platinum Ring
By Tiffany & Co.
Located in Rome, IT
Tiffany & Co. 3 Carat Round Brilliant Cut Diamond Platinum Ring This Tiffany & Co. Diamond
Category

2010s American Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

Platinum Briana Diamond Ring '1/3 Carat'
Located in San Francisco, CA
: ROUND Metal: Platinum Metal Weight: 2.2 Setting Type: Prong Shank Height: 2MM Shank Height: 2.6 Material
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

3 Carat Round Diamond Engagement Ring with Delicate Pave Setting Platinum
By Hannah Florman
Located in Boston, MA
GIA certified 3 carat round briliant diamond engagement ring with G color and VS2 clarity (**this
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

Tacori Platinum 3 Carat Round Pear Shape Diamond Wedding Ring
By Tacori
Located in New York, NY
Tacori Platinum 3 Carat Round Pear Shape Diamond Wedding Ring Luxurious in every way, this ring is
Category

2010s American Romantic Three-Stone Rings

Materials

Diamond, Platinum

GIA 4.64 Carat K/VS1 Round Brilliant Diamond Platinum 3-Stone Engagement Ring
By Sebastian Bernard
Located in Los Angeles, CA
A shiny 4.64 Ct Round Brilliant K/VS1 GIA Certified center Diamond set in a fine Platinum 3 Stone
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, Platinum

Platinum Star Fashion Diamond Ring '2/3 Carat'
Located in San Francisco, CA
This stunning ring features round brilliant diamonds micro-prong-set in three-row. Experience the
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

Platinum Willow Fashion Diamond Ring '3/4 Carat'
Located in San Francisco, CA
Gemstone Type: NATURAL DIAMOND Side Gemstone Shape: ROUND Metal: Platinum Metal Weight: 3.29 Setting Type
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

Platinum Orchid Diamond Cluster Ring '3/4 Carat'
Located in San Francisco, CA
Gemstone Shape: ROUND Metal: Platinum Metal Weight: 2.69 Setting Type: Prong Shank Height: 4.7MM Shank
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

GIA Ideal Cut Round Diamond 3 Carat Diamond Ring
By Hearts On Fire
Located in Rome, IT
diamond weights 3 carats plus 0.50 carats of round diamond pave ring set in solid platinum
Category

2010s American Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

3 Carat Ruby and 1.2 Carat Diamond Platinum Ring
By Iris Fine Jewelry
Located in New York, NY
This stunning 3 carat Ruby and Diamond ring is a true statement piece that exudes elegance and
Category

21st Century and Contemporary Modern Cocktail Rings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold, Platinum

.44 Carat Baguette Round Diamond Platinum Wedding Band Ring
Located in Stamford, CT
Diamond wedding band. 3 round diamonds separated by 2 baguette diamonds in a platinum setting. 3
Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Platinum

Platinum Shiran Two Rows Diamond Ring '1/3 Carat'
Located in San Francisco, CA
: ROUND Metal: Platinum Metal Weight: 3.29 Setting Type: Micro prong Shank Height: 3.2MM Shank Height
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

1.00 Carat 3-Row Diamond Platinum Eternity Wedding Band Ring
Located in Stamford, CT
Diamond platinum eternity wedding band ring. 90 round brilliant cut pave set diamonds, on top
Category

Late 20th Century Band Rings

Materials

Diamond, Platinum

5.05 Carat Round Blue Sapphire Diamond Platinum Engagement Ring
Located in Stamford, CT
center stone, mounted in a platinum setting, beautifully accented with 122 round diamonds along 3 squares
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Blue Sapphire, Sapphire, Platinum

0.41ctw Round Diamond 3-Stone Engagement Ring Platinum Size 8.25
Located in McLeansville, NC
Gemstone Information: - Natural Diamonds - Total Carats - 0.41ctw Cut - Round Brilliant Color - F
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Platinum Delicate Nianna Marquise & Round Diamond Ring '1/3 Ct. tw'
Located in San Francisco, CA
This delicate ring features alternating round brilliant and marquise cut diamonds in 0.35-carat
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

Platinum Flush Prong Set Diamond Eternity Ring '2/3 Carat'
Located in San Francisco, CA
This sparkling flush prong set diamond ring features round diamonds in platinum eternity ring. This
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

Platinum Heather 2 Rows Interweave Diamond Ring '1/3 Carat'
Located in San Francisco, CA
Gemstone Shape: ROUND Metal: Platinum Metal Weight: 3.66 Setting Type: Micro prong Shank Height: 4MM Shank
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

Vintage Platinum 1950s 1.31 Carat Round Diamond Ring
Located in Boston, MA
Vintage Platinum 1950s 1.31ct Round Diamond Ring - Center circular brilliant transitional cut
Category

Mid-20th Century American Retro Engagement Rings

Materials

Diamond, Platinum

Platinum 3 Stone, 1.63 Carat Ruby and .61 Carat Diamond Ring
By Cellini
Located in New York, NY
Classic 3 stone platinum ring. This ring centers a round brilliant diamond weighing 0.61 carats
Category

Vintage 1980s American Contemporary Bridal Rings

Materials

Diamond, Ruby, Platinum

3 Carat Eternity Band Round Brilliant Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
, including platinum, 18k white gold, or 18k yellow gold. The allure of the Platinum Round Brilliant Cut
Category

2010s Italian Modern Engagement Rings

Materials

White Diamond, Diamond, Platinum, 18k Gold, White Gold, 14k Gold

Art Deco 3 Stone Sapphire Ring 3.51 Carat Round Cut Original 1920s Platinum
Located in Dearborn, MI
Genuine Original Art Deco Antique from 1920's 3 Stone Sapphire Ring 3.51ct Round Cut Platinum
Category

Vintage 1920s Art Deco Three-Stone Rings

Materials

Sapphire, Platinum

Art Deco .54 Carats Round Baguette Diamond Platinum Band Ring
Located in Stamford, CT
separated by three baguette cut diamonds, set in a platinum mounting. 3 baguette cut diamonds, .10cts each
Category

Early 20th Century Band Rings

Materials

Diamond, Platinum

Exceptional GIA Certified 3 Carat Round Brilliant Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
This stunning ring features an exquisite 3-carat emerald-cut diamond as its centerpiece, radiating
Category

2010s Unknown Contemporary Engagement Rings

Materials

White Diamond, Diamond, Platinum

Modern Platinum Band 3 Carat Natural Baguette & Round F VS Diamond Cocktail Ring
By Radiam Diamond Company
Located in Los Angeles, CA
Modern Platinum 3 Carat Natural Diamond Band. Set in this piece are 17 Natural F-G color Baguette
Category

2010s American Modern Band Rings

Materials

Diamond, Platinum

1.00 Carat Round Blue Sapphire Pave Diamond Platinum Band Ring
Located in Stamford, CT
1940’s late Art Deco sapphire and diamond ring. 1.00 round sapphire gemstone, set in a platinum
Category

Early 20th Century Cocktail Rings

Materials

Sapphire, Blue Sapphire, Diamond, Platinum

3.28 Carat Round Cut Ruby and Diamond 3 Stone Halo Ring in Platinum
Located in NEW YORK, NY
A stunning ring showcasing a rich intense brilliant round cut Ruby weighing 3.28 carats surrounded
Category

21st Century and Contemporary American Modern Three-Stone Rings

Materials

Ruby, Diamond, Platinum

4 carat Round White Diamond Solitaire Mens Platinum Ring
By Gad & Co.
Located in Miami, FL
A solitaire prong setting with a smooth 950 platinum mounting. A sizable 4-carat natural diamond
Category

2010s Modern Solitaire Rings

Materials

White Diamond, Platinum

New Sapphire Solitaire Engagement Ring, 950 Platinum Round Cut .53 Carat
Located in Greensboro, NC
for your bride-to-be! This 950 platinum ring is fashioned in a classic Tiffany-style design graced by
Category

21st Century and Contemporary Unknown Engagement Rings

Materials

Sapphire, Platinum

Art Deco 3 Carat Sapphire and Diamond Platinum Filigree Ring
Located in Montgomery, AL
carats. The platinum setting features one diamond north and south of the center sapphire. These two
Category

Early 20th Century Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

3 Carat Round Diamond Engagement Ring with Custom 3-Sided Pave Setting
By Hannah Florman
Located in Boston, MA
GIA certified diamond engagement ring with 3 carat center stone, G color and VS2 clarity (**this
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, 14k Gold, Platinum

3 Carat Round Diamond Engagement Ring with Custom 3-Sided Pave Setting
By Hannah Florman
Located in Boston, MA
GIA certified diamond engagement ring with 2 carat center stone, J color with VS1 clarity (**this
Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Diamond, White Gold, Platinum

2.19 Carat 3 Stone Diamond Engagement Ring Platinum in Stock
Located in Boca Raton, FL
Platinum 2.19ctw 3 Stone Diamond Engagement Ring This platinum round brilliant diamond engagement
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Platinum

GIA Certified 3.01 Carat Round Brilliant Cut Diamond Platinum Ring 3X
By Antinori Fine Jewels
Located in Rome, IT
An exquisite investment grade 3.01 carat round brilliant cut diamond set with a micropave of round
Category

2010s Unknown Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 1.06 Carat Round Diamond Halo Platinum Ring
By FERRUCCI
Located in New York, NY
master jeweler, ring size 5 3/4 complimentary adjustable. Certificate available upon request and will
Category

2010s American Engagement Rings

Materials

Diamond, White Diamond, Platinum

2.53 Carat Round Cut Baguette Diamond Three-Stone Platinum Engagement Ring
Located in Stamford, CT
1940s round brilliant cut light yellow center diamond. EGL certified, in a platinum three-stone
Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

Platinum Diamond Vintage Engagement Ring, 900 Round Cut 1.18 Carat
Located in Greensboro, NC
Surprise the love of your life with her dream ring! Crafted in heirloom-quality 900 platinum, this
Category

20th Century Engagement Rings

Materials

Diamond, Platinum

Platinum Diamond Eternity Wedding Band - Round 1.04ctw Channel Set Ring Sz 3 1/2
Located in Greensboro, NC
Size: 3 1/2 Metal Content: Platinum Stone Information Natural Diamonds Carat(s): 1.04ctw Cut
Category

21st Century and Contemporary Wedding Rings

Materials

Diamond, Platinum

Antique Art Deco 3/4 Carat Diamond Ring in Platinum
Located in Charleston, SC
Details: 3/4 Carat of Diamonds Set in Platinum Overall weight: 3.2 grams Measurements: 16.4 mm down
Category

Early 20th Century Unknown Art Deco Bridal Rings

Materials

Diamond, Platinum

GIA Certified 1.01 Carat VS2, E Round Solitaire Diamond Engagement Platinum Ring
Located in New York, NY
GIA Certified, 1.01 Ct VS2, E Round Brilliant Diamond Engagement Platinum Ring GIA cert
Category

2010s Engagement Rings

Materials

Diamond, Platinum

3 Carat Round Brilliant Diamond Solitaire Engagement Ring, GIA Certified
Located in New York, NY
Spectacular engagement ring crafted in Platinum, showcasing a GIA certified round brilliant cut
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

2.06 Carat Certified Round Brilliant Diamond Platinum Vintage Engagement Ring
Located in Hamilton, AU
Crafted in platinum is this timeless diamond solitaire ring carefully set with an alluring 2.06
Category

21st Century and Contemporary Australian Modern Engagement Rings

Materials

Diamond, Platinum

GIA Certified 4.09 Carat Round Diamond Platinum 950 Solitaire Ring
By FERRUCCI
Located in New York, NY
, platinum 950 solitaire ring. Custom options for diamonds and settings are always available. Ring size is 5
Category

2010s American Art Deco Solitaire Rings

Materials

Diamond, Platinum

Cartier Three 3-Color Platinum Round Brilliant Cut Diamond Engagement Ring
By Cartier
Located in Rome, IT
Authentic 2.02 ct Cartier Solitaire Platinum Pear Brilliant Cut Diamond Engagement Ring. The ring
Category

2010s Italian Modern Solitaire Rings

Materials

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

Tacori Diamond Royal T GIA 4 Carats Round Brilliant Platinum Engagement Ring
By Tacori
Located in Austin, TX
This iconic platinum diamond ring is a Tacori Royal T stunner! The 4.00 carat round diamond is GIA
Category

21st Century and Contemporary American Artisan Engagement Rings

Materials

Diamond, White Diamond, Platinum

Art Deco Platinum 1.03 Carat D VS1 Round Diamond Engagement Ring
Located in Los Angeles, CA
DeKara Designs Collection Metal- 90% Platinum, 10% Iridium. Stones- Round EGL USA Certified
Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

Diamond, Platinum

GIA Certified 3 Carat D Color VS1 Clarity Round Brilliant Cut Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
GIA Certified 3 Carat D Color VS1 Clarity Round Brilliant Cut Diamond Ring
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

Round Mele Diamond Platinum Swirl Design Ring
Located in Stamford, CT
sizeable. 15 round Mele diamonds approx. total weight .36cts. Tested: Platinum. 4.4 grams. 3/16 x 7
Category

Vintage 1930s Art Deco Band Rings

Materials

Diamond, Platinum

Platinum Sevilla Diamond Ring '3/4 Ct. tw'
Located in San Francisco, CA
This ring features five(5) floating Brilliante round diamonds set in "U" Shaped delicate prongs on
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

Three 3-Stone 3.40 Carat Round Brilliant Cut Diamond Engagement Ring
By Antinori Fine Jewels
Located in Rome, IT
Three 3-Stone Round Brilliant Cut Diamond Engagement Ring. The ring weighs 4.9 grams, size 4.75
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

Platinum Abigail Diamond Ring '1/3 Ct. Tw'
Located in San Francisco, CA
Side Gemstone Shape: ROUND Side Gemstone Carat Weight: 0.05 Metal: Platinum Metal Weight: 3.3 Setting
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

1.88 Carat Blue Sapphire Platinum Ring
By Iris Fine Jewelry
Located in New York, NY
it a piece to be cherished for generations. 3. Versatile Elegance: This 1.88 Carat Sapphire Ring is
Category

21st Century and Contemporary Modern Engagement Rings

Materials

Blue Sapphire, Platinum

Platinum Micro-Prong Diamond Ring '3 Ct. Tw'
Located in San Francisco, CA
From our signature Micro-Prong wedding band collection, this ring features perfectly matched round
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

Platinum Winte Diamond Ring '3/4 Ct. Tw'
Located in San Francisco, CA
This Delicate ring features Seven (7) floating Brilliante round diamonds set in "U" Shaped delicate
Category

21st Century and Contemporary American Band Rings

Materials

Diamond, Platinum

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3 Carat Round Ring Platinum For Sale on 1stDibs

Surely you’ll find the exact piece of 3 carat round ring platinum you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using platinum, gold and 18k gold. Find an antique version now, or shop for 1208 vintage or 911 modern creation for a more contemporary example of these cherished accessories. If you’re looking for an item from our selection of 3 carat round ring platinum 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. There have been many well-made iterations of the classic choice in our collection of 3 carat round ring platinum over the years, but those made by Tiffany & Co., Antinori Fine Jewels and Cartier 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. If you’re browsing our inventory for an object in our assortment of 3 carat round ring platinum, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a 3 Carat Round Ring Platinum?

Prices for a piece of 3 carat round ring platinum can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $1 and can go as high as $979,000, while this accessory, on average, fetches $6,593.

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 Bulgari 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.