Skip to main content

6 Ct Diamond Solitaire Ring

to
101
372
173
417
248
173
67
49
38
37
30
24
12
9
8
8
7
6
6
5
4
4
3
3
2
2
2
1
1
1
1
1
1
1
1
147
15
8
5
5
Sort By
Tiffany Co. Platinum Solitaire 0.37 Carat Diamond Engagement Ring
By Tiffany Co.
Located in Southampton, PA
This classic Tiffany & Co. Platinum Solitaire 0.37 ct Diamond Engagement Ring is a timeless piece
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

Tiffany Co. Platinum Solitaire 0.40 Carat Diamond Engagement Ring
By Tiffany Co.
Located in Southampton, PA
This classic Tiffany & Co. Platinum Solitaire 0.40 ct Diamond Engagement Ring is a timeless piece
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

0.89Ct Diamond, 18k Yellow Gold Solitaire Ring - Antique Circa 1920
Located in Jesmond, Newcastle Upon Tyne
setting. The solitaire ring displays a 0.89 ct old European round cut diamond held in an eight claw
Category

Vintage 1920s Engagement Rings

Materials

Diamond, 18k Gold, Yellow Gold

Antique 1920s 2.33 Carat Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
A stunning antique 2.33 carat diamond and platinum solitaire style engagement ring; part of our
Category

Vintage 1920s Engagement Rings

Materials

Diamond, Platinum

Antique 1910s Diamond White Gold and Platinum Set Solitaire Ring
Located in Jesmond, Newcastle Upon Tyne
ring; part of our antique jewelry and estate jewelry collections This impressive diamond solitaire
Category

Vintage 1910s Unknown Engagement Rings

Materials

Diamond, 18k Gold, White Gold, Platinum

Tiffany Co. Etoile Ideal Cut Diamond Solitaire Ring in Platinum .20 Carat
By Tiffany Co.
Located in Scottsdale, AZ
Ring Size: 6 Say yes to this gorgeous diamond solitaire engagement ring from the Tiffany & Co
Category

21st Century and Contemporary Unknown Modern Engagement Rings

Materials

Diamond, Platinum

Art Deco 14 Karat White Gold Filigree Vintage Solitaire 0.11 Carat Diamond Ring
Located in Addison, TX
This Art Deco solitaire is a fine example of a filigree solitaire engagement ring crafted in 14
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, White Gold, 14k Gold

Tiffany Co. Platinum Diamond Engagement Ring 0.77 Ct G VS1 Round Excellent Cut
By Tiffany Co.
Located in New York, NY
Classic Tiffany & Co Round Brilliant Solitaire Engagement Ring featuring a 0.77 ct Excellent Cut
Category

Late 20th Century American Modern Engagement Rings

Materials

Diamond, Platinum

Tiffany Co. 0.83 Carat Center E VS1 Round Solitaire Ring Ret:10, 000
By Tiffany Co.
Located in New York, NY
Classic Tiffany & Co Round Brilliant Solitaire Engagement Ring featuring a 0.83 ct Center E color
Category

2010s American Modern Engagement Rings

Materials

Diamond, Platinum

T&Co. Solitaire Engagement Ring Round 1.36ct GVS1 Platinum For open balance only
By Tiffany Co.
Located in New York, NY
. Tiffany & Co Round Brilliant Classic Solitaire Engagement Ring featuring a 1.36 ct Center G color, VS1
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

T&Co. Solitaire Engagement Ring Round 1.36ct GVS1 Platinum For 50% deposit only
By Tiffany Co.
Located in New York, NY
. Tiffany & Co Round Brilliant Classic Solitaire Engagement Ring featuring a 1.36 ct Center G color, VS1
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Platinum

GIA 2.04 Carat Natural Fancy Dark Brown Round Diamond Ring 14 Karat Gold
Located in Great Neck Plaza, NY
GIA natural fancy dark brown round diamond weighing 2.04 ct. Set on 6-prong 14K solitaire yellow
Category

2010s American More Rings

Materials

Diamond, Brown Diamond, Gold, 14k Gold

GIA 1.70 Carat Natural Fancy Brown Round Diamond Ring 14 Karat White Gold
Located in Great Neck Plaza, NY
Natural fancy brown round diamond weighing 1.70 ct. Set on 6-prong 14K solitaire white gold. Ring
Category

2010s American More Rings

Materials

Diamond, Yellow Diamond, 14k Gold, White Gold

Vintage Platinum Diamond with Sapphire Accents Art Deco Engagement Ring
Located in Addison, TX
Ring: 8.53 mm Center Diamond Details: Shape: Old European Cut Carat Weight: 0.76 CT Color: H Clarity
Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

Art Deco Filigree Floral Carved 18 Karat White Gold Solitary Diamond Ring
Located in Addison, TX
This Art Deco solitaire is a fine example of a filigree solitaire engagement ring crafted in 18
Category

Vintage 1920s Unknown Art Deco Engagement Rings

Materials

Diamond, White Gold

Tiffany Co. Engagement Ring with .92 Carat Round Brilliant Centre in Platinum
By Tiffany Co.
Located in New York, NY
Tiffany & Co. Diamond Engagement Solitaire signed by Tiffany & Co. featuring a .92 ct Center
Category

2010s Contemporary Engagement Rings

Materials

White Diamond, Platinum

Tiffany Co. Engagement Ring with 1.91 Carat G VS1 Round Brilliant Centre
By Tiffany Co.
Located in New York, NY
Tiffany & Co. Diamond Engagement Solitaire signed by Tiffany & Co. featuring a 1.91 ct Center
Category

2010s Contemporary Engagement Rings

Materials

White Diamond, Platinum

Tiffany Co. Engagement Ring with .51 Carat Round Brilliant Center in Platinum
By Tiffany Co.
Located in New York, NY
Classic Diamond Engagement Solitaire ring signed by Tiffany & Co. featuring a 6 prong setting 0.51
Category

2010s American Contemporary Engagement Rings

Materials

Diamond, Platinum

Rose Gold Diamond Solitaire Engagement Ring
Located in New York, NY
Diamond Solitaire engagement ring crafted in 14 karat rose gold. Featuring a single round
Category

2010s Engagement Rings

Materials

Diamond, 14k Gold, Rose Gold

1.56 Carat Solitaire Platinum Diamond Ring
Located in Inverness, GB
Lovely solitaire diamond ring. Brand new and boxed ready to be given as a present. The ring is
Category

2010s British Solitaire Rings

White Pearl Solitaire Ring in White Gold with Diamond Halo
Located in Sherman Oaks, CA
Design features a pearl with a double halo of round cut diamonds Ring Size = 6 1/2 Total Diamond
Category

Early 2000s American Modern Solitaire Rings

Materials

Cultured Pearl, 14k Gold

Art Deco Diamond Onyx Ring
Located in New York , NY
Art Deco diamond and onyx tablet and stepped shoulder platinum ring, center is 2.19 ct with 6
Category

American Solitaire Rings

Materials

Diamond

Eclipse Tanzanite and Diamond Swirl Twist Solitaire 18 Karat White Gold in Stock
By JeweLyrie
Located in Paterson, NJ
This listing is for Eclipse Tanzanite and Diamond Swirl Twist Solitaire Ring set in 18K White Gold
Category

2010s American Contemporary Solitaire Rings

Materials

Diamond, Tanzanite, 18k Gold

Edwardian Large Natural Saltwater Pearl Diamond Ring
Located in Napoli, IT
unique antique solitaire ring of fascinating beauty Side Diamonds are six in number old mine cut Diamonds
Category

Antique Early 1900s Edwardian Solitaire Rings

Materials

Diamond, Natural Pearl, 18k Gold

Russian Alexandrite and Diamond Ring Gubelin Certification
Located in Toronto, ON
old mine cut diamonds approximately .05 cts each. G-H colour and SI1-2 clarity. This ring measures
Category

1990s Solitaire Rings

Materials

Alexandrite, Diamond, 18k Gold

Half Moon Grey Diamond 14 Karat Gold Ring
By Mary Gallagher
Located in Foxborough, MA
design with matte finish. Size 6 0.74 Ct Natural Loose Diamond Half moon Salt and Pepper 6.50 MM X
Category

2010s American Artisan Solitaire Rings

Materials

Diamond, Gold

White Gold 1.02 Carat Asscher Diamond Solitaire Engagement Ring
Located in Columbia, MO
Solitaire Ring Size 6 Width 3 mm Metal Purity 14k Stone 1 Information Stone Type Diamond Stone Shape
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 14k Gold, White Gold

Rare Art Deco 11.0 Ct Natural Blue Zircon .90 Ct Diamond Platinum Ring
Located in Napoli, IT
Like Blue Diamond Monumental, very rare, authentic Natural Blue Zircon solitaire ring of the best
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Zircon, Platinum

5.00 ct. Antique Cushion-Cut French Made Diamond Ring
Located in San Francisco, CA
This scintillating solitaire diamond ring stars a vintage 5.00 ct. antique cushion-cut diamond
Category

21st Century and Contemporary French Contemporary Engagement Rings

Materials

Diamond, Platinum

Diamond and Sapphire 18 Karat Yellow Gold Double Solitaire Ring
Located in Miami, FL
Brilliance Jewels, Miami Questions? Call Us Anytime! 786,482,8100 Size: 6 (sizable) Style: Ring
Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold

Art Deco 1.39 Carat Weighted G VS Solitaire Diamond Platinum Ring
Located in Napoli, IT
Love Me! In absolute in the first place to declare love, Diamond solitaire ring is full of
Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Art Déco circa 1925, Certified 3.99 Carat Diamond Solitaire Engagement Ring
Located in Berlin, Berlin
Diamond solitaires have been a favourite choice for engagement rings since the late 19th century
Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Platinum

White Gold 0.75 Carat Round Diamond and Sapphire Solitaire Engagement Ring
Located in Columbia, MO
Certification/Grading Yes Style Solitaire with Accents Ring Size 6 Sizable YES Metal Purity 14k Stone 1
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Sapphire, 14k Gold, White Gold

Antique Certified 1.50 Carat Old European Cut Diamond Solitaire Engagement Ring
Located in Berlin, Berlin
. It weighs in at 1.50 ct and is accompanied by six smaller diamonds on the ring shoulders. Even though
Category

Early 20th Century Unknown Edwardian Engagement Rings

Materials

Diamond, 14k Gold, Yellow Gold, Platinum

Tiffany Co. Platinum and Diamond Oval Solitaire 2.01 Carat
By Tiffany Co.
Located in Middletown, DE
For your consideration is a Tiffany & Co OVAL Cut 2.01 carat Diamond engagement ring. The center
Category

2010s American Engagement Rings

Materials

White Diamond, Platinum

Ring Yellow Gold Diamond
Located in PARIS, FR
ring body. set on white gold. of a brilliant cut diamond of about 0.36 ct. supported by 6 brilliant cut
Category

20th Century French Engagement Rings

Materials

Diamond, Yellow Gold

Betteridge 2.71 Carat Round Brilliant Diamond Engagement Ring
By Betteridge
Located in Greenwich, CT
Diamond solitaire engagement ring, centering a colorless 2.71 carat round brilliant-cut diamond (F
Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, White Diamond, Platinum

Tiffany Co. Classic 1.25 Carat Diamond Platinum Ring
By Tiffany Co.
Located in Toronto, Ontario
A classic six claw Tiffany solitaire set in platinum. The diamond weighs 1.25 ct, H colour, VVS2
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Platinum 1.96 Carat Oval Diamond Halo Engagement Ring
Located in Columbia, MO
Information Stone Type Diamond Stone Shape Round Stone Color H Clarity SI1 Count 6 Stone Weight 0.06 ct Stone
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

White Gold 1.00 Carat Round Diamond Straight Engagement Ring
Located in Columbia, MO
) 1 ctw Certification/Grading No Style Solitaire With Accents Ring Size 6 Sizable Yes Width 2 mm Metal
Category

21st Century and Contemporary Engagement Rings

Materials

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

White Gold 2.59 carat Cushion Diamond Halo Engagement Ring
Located in Columbia, MO
) 2.59 ctw Certification/Grading Yes Style Solitaire With Accents Ring Size 6 Sizable Yes Metal Purity
Category

21st Century and Contemporary Engagement Rings

Materials

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

Tiffany Co. Platinum Diamond 1.30 Carat Round Engagement Ring
By Tiffany Co.
Located in Middletown, DE
natural round engagement ring set in the classic 6 prong setting. This Diamond ring currently retails at
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

White Gold 2.29 Carat Emerald Diamond Halo Engagement Ring
Located in Columbia, MO
Retail $4,450.00 Metal White Gold Total Carat Weight (TCW) 2.29 ctw Style Solitaire with Accents Ring
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 14k Gold, White Gold

White Gold 0.87 Carat Round Diamond Unique Engagement Ring
Located in Columbia, MO
Weight (TCW) 0.87 ctw Certification/Grading Yes Style Solitaire with Accents Ring Size 6 Sizable YES
Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, 14k Gold, White Gold

White Gold 11.13 Carat GIA Certified Cushion Diamond Engagement Ring
Located in Columbia, MO
Weight (TCW) 11.13 ctw Certification/Grading Yes Style Solitaire With Accents Ring Size 6 Sizable Yes
Category

21st Century and Contemporary Engagement Rings

Materials

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

Tiffany Co. Platinum Diamond 1.05 Carat Round Engagement Ring H
By Tiffany Co.
Located in Middletown, DE
laser inscribed with the serial number. In addition the ring is marked with the diamond size 1.05 ct
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Platinum Round Old Mine Cut Diamond 1.19 Carat Cluster Engagement Ring
Located in Lancashire, Oldham
A fabulous platinum Art Deco style solitaire Old Mine cut diamond cluster ring that has an
Category

Early 2000s Unknown Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

White Gold 3.70 Carat GIA Certified Cushion Diamond Halo Engagement Ring
Located in Columbia, MO
(TCW) 3.70 ctw Certification/Grading Yes - GIA Style Solitaire With Accents Ring Size 6 Sizable Yes
Category

21st Century and Contemporary Engagement Rings

Materials

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

Tiffany Co. Platinum Diamond 1.02 Carat Round Engagement Ring Unworn
By Tiffany Co.
Located in Middletown, DE
laser inscribed with the serial number. In addition the ring is marked with the diamond size 1.02 ct
Category

Early 2000s American Engagement Rings

Materials

Diamond, Platinum

Rose Gold 2.59 Carat GIA Certified Round Diamond Halo Engagement Ring
Located in Columbia, MO
Weight (TCW) 2.59 ctw Certification/Grading Yes - GIA Style Solitaire With Accents Ring Size 6 Sizable
Category

21st Century and Contemporary Engagement Rings

Materials

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

Tiffany Co. Platinum Diamond 1.08 Carat Round Engagement Ring H VS2
By Tiffany Co.
Located in Middletown, DE
inscribed with the serial number. In addition the ring is marked with the diamond size 1.08 ct. And serial
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany Co. Platinum Diamond .80 Carat Round Engagement Ring E VVS1
By Tiffany Co.
Located in Middletown, DE
Diamond .80 carat natural round engagement ring set in the classic 6 prong setting. The ring was
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany Co. Platinum Diamond 1.64 Carat Round Engagement Ring D VS1
By Tiffany Co.
Located in Middletown, DE
serial number. In addition the ring is marked with the diamond size 1.64 ct. And serial number inscribed
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany Co. Platinum Diamond 1.19 Carat Round Engagement Ring I VS2
By Tiffany Co.
Located in Middletown, DE
natural round engagement ring set in the classic 6 prong setting. This stunning diamond looks HUGE
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany Co. Platinum Diamond 1.00 Carat Round Engagement Ring 2018 New
By Tiffany Co.
Located in Middletown, DE
addition the ring is marked with the diamond size 1.00 ct. And serial number inscribed inside the shank of
Category

2010s American Engagement Rings

Materials

Diamond, Platinum

Tiffany Co. Platinum and Diamond Princess Cut Ring .57 Carat D VS2
By Tiffany Co.
Located in Middletown, DE
serial number and diamond size .57 ct. inscribed inside the shank of the ring. This ring is in like new
Category

2010s American Engagement Rings

Materials

Diamond, White Diamond, Platinum

Tiffany Co. Platinum and Diamond Princess Cut Ring 1.71 Carat H VS1
By Tiffany Co.
Located in Middletown, DE
Princess cut 1.71 carat natural diamond solitaire. The ring shows like a brand new ring with no marks
Category

Early 2000s American Engagement Rings

Materials

Diamond, White Diamond, Platinum

  • 1
Get Updated with New Arrivals
Save "6 Ct Diamond Solitaire Ring", and we’ll notify you when there are new listings in this category.

6 Ct Diamond Solitaire Ring For Sale on 1stDibs

Surely you’ll find the exact 6 ct diamond solitaire ring you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Gold, White Gold and 18k Gold. Find an antique version now, or shop for 123 vintage or 226 modern creation for a more contemporary example of these cherished accessories. If you’re looking for a 6 ct diamond solitaire ring 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. For this particular accessory, there are many different carat weights to choose from, but .5 Carat and 1 Carat versions are of considerable interest. Creating a 6 ct diamond solitaire ring has been a part of the legacy of many jewelers, but those produced by Tiffany Co., Cartier and Hancocks are consistently popular. A round cut version of this piece has appeal, but there are also oval cut and cushion cut versions for sale. Finding a 6 ct diamond solitaire ring for sale for women should be easy, but there are 154 pieces available to browse for unisex as well as men, too.

How Much is a 6 Ct Diamond Solitaire Ring?

Prices for a 6 ct diamond solitaire ring can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $100 and can go as high as $860,000, while this accessory, on average, fetches $7,044.

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.  

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.