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I Flawless 3 Carat Cushion Cut Diamond Platinum Solitaire Ring
By Antinori Fine Jewels
Located in Chicago, IL
platinum the total carat amount is 3 carats the main stone weight is 3 carats has h Color Internally
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, White Diamond, Platinum

AGS Certified 14K Yellow Gold 3/8 Carat Princess Solitaire Diamond Stud Earrings
Located in New York, NY
Gold each earring showcases a sparkling Princess-Cut Solitaire Diamond in a 4-Prong Setting. Dazzling
Category

21st Century and Contemporary American Stud Earrings

Materials

White Diamond, Diamond, Yellow Gold, 14k Gold

AGS Certified 14K Yellow Gold 3/8 Carat Princess Solitaire Diamond Stud Earrings
Located in New York, NY
Gold each earring showcases a sparkling Princess-Cut Solitaire Diamond in a 4-Prong Setting. Dazzling
Category

21st Century and Contemporary Indian Stud Earrings

Materials

Diamond, White Diamond, Yellow Gold, 14k Gold

AGS Certified 14K Yellow Gold 3/8 Carat Princess Solitaire Diamond Stud Earrings
Located in New York, NY
Gold each earring showcases a sparkling Princess-Cut Solitaire Diamond in a 4-Prong Setting. Dazzling
Category

21st Century and Contemporary American Stud Earrings

Materials

Diamond, White Diamond, Yellow Gold, 14k Gold

Certified 14K Yellow Gold 3/8 Carat Princess-Cut Solitaire Diamond Stud Earring
Located in New York, NY
Gold each earring showcases a sparkling Princess-Cut Solitaire Diamond in a 4-Prong Setting. Dazzling
Category

21st Century and Contemporary American Contemporary Stud Earrings

Materials

White Diamond, Diamond, 14k Gold, Yellow Gold

AGS Certified 10k Yellow Gold 1/3 Carat Round Diamond Solitaire Pendant Necklace
Located in New York, NY
Some things shouldn't be reinvented, which is why we created the solitaire diamond necklace. This
Category

21st Century and Contemporary Indian Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, 10k Gold, Yellow Gold

AGS Certified 14K Yellow Gold 3/8 Carat Round Solitaire Diamond Stud Earrings
Located in New York, NY
gold, each earring showcases a sparkling round, brilliant cut diamond solitaire. Dazzling with a bright
Category

21st Century and Contemporary Indian Modern Stud Earrings

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

GIA Certified 3 Carat Oval Diamond Solitaire Ring G VS2 Excellent Cut and Polish
By Antinori Fine Jewels
Located in Chicago, IL
Oval Cut Diamond Halo Engagement Ring. The center stone is a Ideal Oval Brilliant Cut diamond weighing 2.23 ct, g (rare white) in color, vs2 (This is the best vs2 that you will see, ...
Category

2010s Italian Modern Engagement Rings

Materials

Diamond, 18k Gold

3 Emerald Pie Cut Diamond Weighing 0.98 Carat 18K White Gold Solitaire Ring
By Malpani Jewels
Located in Hung Hom, HK
9 Pieces of D Color VVS clarity are set in one pie emerald pie cut. The ring consists of 3 Emerald
Category

2010s Hong Kong Art Nouveau Three-Stone Rings

Materials

Diamond, White Diamond, 18k Gold, White Gold

Stunning 3/8 CT. T.W. Diamond Solitaire Stud Earrings in 14K White Gold
Located in New York, NY
Stunning 3/8 CT. T.W. Diamond Solitaire Stud Earrings in 14K White Gold Your look isn't complete
Category

21st Century and Contemporary Stud Earrings

Materials

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

6 Carat Solitaire Treated Ruby Earrings 4 Prongs Screw Back 14 Karat White Gold
Located in New York, NY
the week. These stud earrings 3 carat each Solitaire round Treated Ruby Set in 14 kt White gold. Post
Category

2010s Stud Earrings

Materials

Ruby, 14k Gold, White Gold

2 Carat Ct GIA Certified Oval Solitaire Diamond Engagement Ring 14k White Gold
Located in New York, NY
diamond is GIA certified with a full diamond grading electronic report. A large 1 3/4 carat solitaire
Category

2010s Engagement Rings

Materials

White Gold

6.0ct Face Up Emerald Cut "Illusion" Pie-Cut Diamond Bezel Earrings 18k Platinum
Located in New York, NY
will appear like 3 carats Emerald cut Diamond solitaire, make look of 6.0ct in total. A great choice
Category

2010s Dangle Earrings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Tanzanite 3 Carat and Australian Opal Inlay, Diamond, 14 Karat
Located in Aliso Viejo, CA
measuring 10.60 x 7.44 x 6 mm having a total weight of estimated 2.96 carats. Inlay, Australian opals flank
Category

20th Century Unknown Contemporary Solitaire Rings

Materials

Tanzanite, 14k Gold

Invisible Set Princess Diamond Yellow Gold Pendant Necklace
Located in Columbia, MO
This lovely pendant offers the look of a 3 carat solitaire princess diamond without the hefty price
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

3 Carat Old Round Cut Diamond Platinum Solitaire Ring
Located in London, GB
3 carat (approximate weight) old round cut diamond solitaire ring set in platinum with baguette cut
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, Platinum

White Gold .40 Carat Round Diamond 3-Prong Solitaire Stud Earrings
Located in Columbia, MO
combined total weight of 0.40 carat and are set in 14 karat white gold 3 prong solitaire or stud earrings
Category

21st Century and Contemporary Stud Earrings

Materials

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

Kwiat Platinum Round Diamond 3-Prong Solitaire Necklace
By Kwiat
Located in Columbia, MO
Total Carat Weight (TCW) - 0.33 ct Style - Solitaire Necklace Fastening - Lobster Clasp Length (inches
Category

2010s Pendant Necklaces

Materials

Diamond, White Diamond, Platinum

Diamond White Gold Oval Shaped Cluster Halo Pendant Necklace
Located in Columbia, MO
/4 carat oval solitaire! This sparkly center is surrounded by a halo of glistening smaller diamonds
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

3 Carat Pink Tourmaline 18Kt Yellow Gold
By Romy Ivsic
Located in Los Angeles, CA
Fuchsia being my favorite shade of pink Tourmaline, this one reminds me of the Bougainvilliers around my father's house in the south of France. Such a happy color! Set in 18 kt Yello...
Category

21st Century and Contemporary American Contemporary Solitaire Rings

Materials

Tourmaline, Yellow Gold

3 Carat Pink Tourmaline Urchin Ring 18kt Yellow Gold
By Romy Ivsic
Located in Los Angeles, CA
here it is. Big enough to nest this 3 Carat very Pink and sparkly Tourmaline. 18 Kt yellow Gold.
Category

21st Century and Contemporary American Contemporary Solitaire Rings

Materials

Tourmaline, Yellow Gold

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3 Carat Solitaire For Sale on 1stDibs

Find the exact 3 carat solitaire you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using Gold, Platinum and 18k Gold. Find an antique version now, or shop for 2323 vintage or 3366 modern creation for a more contemporary example of these cherished accessories. Making the right choice when shopping for a 3 carat solitaire may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 18th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. For this particular accessory, there are many different carat weights to choose from, but .5 Carat and 1 Carat versions are of considerable interest. Finding an appealing 3 carat solitaire — no matter the origin — is easy, but Tiffany Co., Antinori Fine Jewels and Yianni Creations each produced a popular version that is worth a look. A 3 carat solitaire can be a stylish choice for most occasions, but Diamond rings, from our inventory of 4110, can add a particularly distinctive touch to your look, day or night. A round cut version of this piece has appeal, but there are also oval cut and emerald cut versions for sale. If you’re browsing our inventory for a 3 carat solitaire, 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 Solitaire?

On average, a 3 carat solitaire at 1stDibs sells for $5,090, while they’re typically $96 on the low end and $4,900,000 for the highest priced versions of this item.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And 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

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.  

Questions About 3 Carat Solitaire
  • 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 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 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.