Skip to main content

6 Carat Engagement Rings

to
95
91
84
52
47
23
163
67
19
3
20
3
3.25
3.5
3.75
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
6.75
7
7.25
7.5
7.75
12
156
1
1
1
3
1
1
114
53
1
37
33
27
26
10
49
9
7
6
6
85
24
7
2
168
158
Carat Weight: 6 Carat
GIA Certified 6 Carat Emerald Cut Diamond Platinum Ring with tapered baguette
Located in Chicago, IL
This remarkable engagement ring features a stunning 6 carat emerald-cut diamond, GIA certified for its exceptional quality. The elongated shape and step-cut facets of the center ston...
Category

2010s Unknown Contemporary 6 Carat Engagement Rings

Materials

Diamond, White Diamond, Platinum

J. Birnbach 6.05 carat GIA K SI2 Oval Diamond Spiral Solitaire Engagement Ring
Located in New York, NY
This sleek, elegant engagement ring is J. Birnbach's modern take on the classic solitaire. The ring features a GIA certified 6.05 carat oval diamond, graded as K color and SI2 clarit...
Category

2010s American 6 Carat Engagement Rings

Materials

Diamond, 18k Gold, Platinum

Louis Newman Co GIA Certified 6.11 Carat Emerald Cut Diamond Three Stone Ring
Located in New York, NY
Center Stone is 6.11 Carat GIA certified Emerald Cut with an L color and VVS2 Clarity. It is very hard to capture the true color of the diamond but it does look better in person than...
Category

2010s American 6 Carat Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 6.18 Carat Emerald Cut Diamond Ring
Located in Chicago, IL
Discover the epitome of elegance and sophistication with this breathtaking engagement ring, a true testament to timeless design and exquisite craftsmanship. At its heart lies a capti...
Category

2010s Unknown Contemporary 6 Carat Engagement Rings

Materials

Diamond, White Diamond, Emerald

GIA Certified 6.01 Carat F VS2 Emerald Cut Diamond Engagement Ring
Located in Chicago, IL
A masterpiece of architectural elegance and timeless sophistication, this extraordinary three-stone ring showcases a GIA-certified 6.01 carat emerald cut diamond of exceptional quali...
Category

2010s American Contemporary 6 Carat Engagement Rings

Materials

Diamond, Platinum

“Diana” Spaced Oval Halo Five Carat Pink Oval Sapphire Platinum Ring
Located in New York, NY
This is a custom ring, made to order for you, by the David Gross Group. One of our most popular styles, the “Diana” spaced oval halo setting, is our fresh take on a true classic. ...
Category

2010s American Contemporary 6 Carat Engagement Rings

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

Vintage 1940s 6.00 Carat Star Sapphire Ring
Located in New York, NY
Finely crafted in 14k yellow gold with a Cabochon Star Sapphire weighing approximately 6.00 carats. Circa 1940s Size 3 1/2, resizable
Category

1940s Retro Vintage 6 Carat Engagement Rings

Materials

Star Sapphire, 14k Gold

GIA Certified 6 Carat Emerald Cut Diamond E Color VS1 Clarity
Located in Chicago, IL
Timeless Elegance in Platinum Make a statement of refined luxury with this breathtaking 6.00-carat GIA-certified emerald-cut diamond ring, masterfully set in solid platinum. Flanked ...
Category

2010s American Contemporary 6 Carat Engagement Rings

Materials

Diamond, White Diamond, Platinum

Natural Ruby Diamond Ring 14k Gold 6.32 TCW GIA Certified
Located in Brooklyn, NY
Natural Finely Faceted Quality Ruby and Diamond Ring set in 14k Gold 6.32 TCW Size 6.5 and resizable GIA and GAL Certified $6,975 111872 This is a Unique Custom Made Glamorous Piec...
Category

2010s American 6 Carat Engagement Rings

Materials

Diamond, Ruby, 14k Gold, White Gold

Sunita Nahata Morganite 6.40ct. Fancy Ring in 18 Karat Rose Gold with Diamond.
Located in Hong Kong, HK
This collection features an array of magnificent morganites! Accented with more morganites and diamonds these rings are made in rose gold and present a classic yet elegant look. Cl...
Category

21st Century and Contemporary Thai Contemporary 6 Carat Engagement Rings

Materials

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

6.35 Carat Burma Heart Sapphire Diamond Engagement Ring 18K Gold /Certified
Located in US
This treasure has a sapphire 5.35 carat, measuring 10.64 x 11.04 mm is TLG certified. The gem source is Burma. The royal blue color of this gorgeous center stone is complemented by...
Category

21st Century and Contemporary American Art Deco 6 Carat Engagement Rings

Materials

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

NO HEAT AGL Certified 6 Carat Blue Sapphire Diamond 18 Carat White Gold Ring
Located in Chicago, IL
eye-catching and high quality 10.50cttw sapphire and diamond ring truly brings the glamour and the sparkle! The impressively large 6.00ct AGL certified unheated oval sapphire center ...
Category

2010s Italian 6 Carat Engagement Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

GIA Certified 6.47 Carats Cushion Cut Yellow Diamond Halo Engagement Ring
Located in New York, NY
A well-crafted engagement ring, showcasing a 6.47 carats cushion brilliant cut diamond certified by GIA as U-V color and SI1 clarity, set on a four prong basket made of 18K yellow go...
Category

21st Century and Contemporary American Contemporary 6 Carat Engagement Rings

Materials

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

Sophia D. 6.38 All Diamond French Cut Eternity Platinum Ring Band
Located in New York, NY
This beautiful eternity band is composed of 17 French cut stones weighing a total of 6.38 carats. Sophia D by Joseph Dardashti LTD has been known worldwide ...
Category

2010s American Art Deco 6 Carat Engagement Rings

Materials

Diamond, White Diamond

GIA Certified 6.01 Carat Round Cut Diamond E Color Ring with Tapered Baguette
Located in Chicago, IL
This stunning GIA Certified ring features a magnificent 6.01 Carat round brilliant diamond, set in an elegant 18k white gold band. E color diamond is near colorless, displaying a s...
Category

2010s Unknown Contemporary 6 Carat Engagement Rings

Materials

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

Sunita Nahata Morganite 3.92ct. Fancy Ring in 18KRG with Diamond.
Located in Hong Kong, HK
This collection features an array of magnificent morganites! Accented with diamonds these rings are made in rose gold and present a classic yet elegant look. Classic morganite ring...
Category

21st Century and Contemporary Thai Contemporary 6 Carat Engagement Rings

Materials

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

6 Carat Fancy Intense Yellow Round Diamond VS2 GIA in Platinum Ring
Located in New York, NY
Rare SIX carat Fancy Intense Yellow Round Diamond mounted in a handmade Platinum mounting with side pear shape diamonds and smaller white diamond outline. The ROUND shape is extreme...
Category

2010s American Contemporary 6 Carat Engagement Rings

Materials

Yellow Diamond, 18k Gold, Platinum

GIA Certified 5 Round Cut Diamond Ring
Located in Chicago, IL
Round Brilliant Cut Diamond Halo Platinum Engagement Ring. The ring weighs 6.8 grams, size 5.25, the center stone is a Natural Round Brilliant Cut diamond weighing 5.06 ct, E in col...
Category

2010s Italian Modern 6 Carat Engagement Rings

Materials

Diamond, White Diamond, Emerald

GIA Certified 5 Round Cut Diamond Ring
GIA Certified 5 Round Cut Diamond Ring
$472,000 Sale Price
20% Off
6.07 Carat Radiant Cut Yellow Diamond Three-Stone Engagement Ring
Located in New York, NY
Features a color-rich yellow diamond, flanked by tapered baguette diamonds on either side. The side diamonds are set in-between a row of round brilliant diamonds set in polished plat...
Category

21st Century and Contemporary American 6 Carat Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

6.06 Carat Rectangular Step Cut Diamond Engagement Ring
Located in New York, NY
Finely crafted in platinum with a GIA certified Rectangular Step cut Diamond at the center weighing 6.06 carat, L color, VS2 clarity, GIA #5171797007. The ring also features 4 accent...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Diamond, Platinum

Orange Amber Citrine Brilliant Cut 14K Yellow Gold Diamond Pave Cocktail Ring
Located in Oakton, VA
A study in warmth, elegance, and brilliance. This striking ring features a captivating, fiery orange citrine. The brilliant-cut stone is beautifully set in a 14k gold band, accented ...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Citrine, Diamond, 14k Gold, Yellow Gold

GIA Certified 6.06 Carat Emerald Cut F Color IF Clarity Diamond Ring in Platinum
Located in Chicago, IL
This engagement ring is an extraordinary expression of refined elegance and masterful craftsmanship. Set in platinum and enhanced with trillion cut side diamonds it presents a sophisticated and balanced silhouette. At its center rests a GIA certified 6.06 carat emerald cut diamond...
Category

2010s Contemporary 6 Carat Engagement Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 6.00 Carat Oval Green Emerald Halo Half Moon Diamond Ring.
Located in San Francisco, CA
This Platinum and 18K Yellow Gold ring feature a 6.00 Carat Oval shaped Natural Emerald from Zambia in a vibrant green color encircled by a halo of brilliant round diamonds and flank...
Category

21st Century and Contemporary American 6 Carat Engagement Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold, Platinum

GIA Certified 6.21 Carat Round Cut Diamond Three Stone Engament Ring in Platinum
Located in Chicago, IL
This breathtaking engagement ring features a magnificent 6.21 carat round cut diamond as it's centerpiece, accented by two elegant tapered baguette diamonds in a classic three-stone ...
Category

2010s Unknown Contemporary 6 Carat Engagement Rings

Materials

Diamond, White Diamond, Platinum

6 Carat Cushion Blue Topaz 18 Karat White Gold 0.38 Carat Diamond Halo Ring
Located in London, GB
An impressive 6 Carat (approximately) Cushion Cut Blue Topaz Dress / Engagement Ring surrounded by a pave set halo and both sides of the shank With a total diamond weight of 0.38 carat white round brilliant cut diamonds. This Ring has been beautifully set in 18 Karat White Gold with a British Hallmark from the London Assay Office. This design can be bespoke on request, size and gemstones. Please note these rings are uniquely made and the weight of the stones and ring may vary slightly to get the look and the size, please ask for further details. Diamond and Blue Topaz Ring 6.00 Carat Blue Topaz Cushion Shape (11.90mm x 10.00mm) 0.38 Carat Diamond – G/H SI Weight: 3.97 grams British Hallmarked Made by Hasbani Diamonds...
Category

2010s British Modern 6 Carat Engagement Rings

Materials

White Diamond, Topaz, Diamond, Blue Topaz, Gold, 18k Gold, White Gold

GIA 6.02 Carat Natural Spinel Diamond Platinum Three-Stone Engagement Ring
Located in Stamford, CT
1920's Spinel and diamond three-stone engagement ring. Cushion cut pink Spinel half bezel set center stone with two old mine brilliant cut side diamonds. GIA certified no heat Spinel...
Category

Early 20th Century 6 Carat Engagement Rings

Materials

Diamond, Spinel, Platinum

Round Swiss Blue Topaz Diamond Halo 14K Yellow Gold Statement Signet Ring
Located in Oakton, VA
Radiant Elegance and Craftsmanship. Set with a Faceted Blue Topaz 6.00 Cts Encircled by a Halo of Sparkling Diamonds 0.25 CTW Intricate Gold Band ...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Diamond, Blue Topaz, 14k Gold, Yellow Gold

Peter Suchy GIA 4.23 Carat Oval Yellow Green Sapphire Platinum Engagement Ring
Located in Stamford, CT
Exceptional green and yellow oval Sapphire and diamond three-stone engagement ring. Simply put, this ring is spectacular. GIA certified oval yellow and green center sapphire mounted ...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Sapphire, Yellow Sapphire, Green Sapphire, Platinum

GIA Certified 4.83 Carat Sapphire Diamond White Gold Engagement Ring
Located in Stamford, CT
4.83ct oval sapphire and diamond engagement ring. Gia certified natural color, simple heat only, no residue. Center oval sapphire set in 18k white gold setting, accented with step cu...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

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

Natural Citrine Ring 6.5 14k W Gold 6.48 Cts Certified
Located in Brooklyn, NY
Natural Finely Faceted Quality Citrine Ring Size 6.5 14k W Gold 6.48 Cts Certified $3,950 310628 This is a Unique Custom Made Glamorous Piece of Jewelry! Nothing says, “I Love you”...
Category

2010s American 6 Carat Engagement Rings

Materials

Citrine, Gold

5.50ct Cushion Blue Topaz Engagement Ring 0.66 Carat Round Diamond in 18ct Gold
Located in London, GB
This Stunning 5.50ct Cushion Cut Blue Topaz Engagement Ring set in 18ct White Gold with Four Claws. Featuring an intertwined Ring Shank set with 0.66ct H-SI Pave set Diamonds. This R...
Category

2010s British Modern 6 Carat Engagement Rings

Materials

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

Diamond Aquamarine Ring 14k Gold 6.25 TCW Certified
Located in Brooklyn, NY
Natural Finely Faceted Quality Aquamarine Diamond Ring Size 6.5 14k Gold 6.25 TCW Certified $6,950 120672 This is a Unique Custom Made Glamorous Piece of Jewelry! Nothing says, “I ...
Category

2010s American 6 Carat Engagement Rings

Materials

Aquamarine, Diamond, 14k Gold

GIA Certified 6.16 Carat Fancy Yellow Diamond Platinum 18K Yellow Gold Ring
Located in Chicago, IL
GIA Certified 6.16 Carat Fancy Yellow Diamond Platinum & 18K Yellow Gold Ring An exquisite and vibrant diamond ring featuring a GIA Certified 6.16 Carat Cut-Cornered Square Modified...
Category

2010s Italian Contemporary 6 Carat Engagement Rings

Materials

Yellow Diamond, Diamond, White Diamond, Yellow Gold, Gold, 18k Gold, Whi...

Georgios Collections 18 Karat Yellow Gold Pear Peridot Ring with Diamond Bezel
Located in Astoria, NY
S.Georgios designer presents a pear shape 6.07 Carats Peridot Ring with a White Diamond Bezel with a total weight of 0.142 Carats. This simple yet stunning ring is handmade from 18 K...
Category

21st Century and Contemporary Greek Contemporary 6 Carat Engagement Rings

Materials

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

GIA Certified 6.09 Carat Green Emerald 18k White Yellow Gold Halo Diamond Ring
Located in San Francisco, CA
This 18K White and Yellow gold ring features a 6.09 - Carat Ascher cut Natural Green emerald from Ethiopia. Excellent bright and vibrant green color. The emerald is encircled by a ha...
Category

21st Century and Contemporary American 6 Carat Engagement Rings

Materials

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

GIA 6.01ct Cushion Solitaire with Half Eternity 18K White Gold Diamond Ring
Located in New York, NY
This sophisticated diamond ring features a striking centerpiece of a cushion diamond, weighing 6.01 and boasting a rich J and I1. Handcrafted with precision, the ring showcases a bea...
Category

21st Century and Contemporary American Contemporary 6 Carat Engagement Rings

Materials

Diamond, White Gold

Zambian Emerald Diamond Ring
Located in Los Angeles, CA
This ring displays a 6.32 carat Zambian emerald set in 18 carat white and yellow gold, flanked by tapered shaped diamonds 0.67 carat. The emerald has a elongated cut, emphasizing its...
Category

21st Century and Contemporary Contemporary 6 Carat Engagement Rings

Materials

Diamond, Emerald, 18k Gold

18K White Yellow Gold GIA Certified 6.23 Carat Green Emerald Halo Diamond Ring
Located in San Francisco, CA
This 18k white and yellow gold ring features a 6.23 Carat Emerald cut Natural Green emerald from Zambia. It is encircled by a halo of brilliant round diamonds on a 6.00 mm wide split...
Category

21st Century and Contemporary American 6 Carat Engagement Rings

Materials

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

GIA 0.79 Carat Fancy Light Green (Undetermined) SI2 Clarity Diamond Ring
Located in บางรัก, TH
18kt white gold ring with diamonds Gold colour & karat: White gold 18kt Weight: 6.344 grams Set with- Stone type: Diamonds Shape: Heart Carat: 0.79 ct Colour: Fan...
Category

2010s Asian 6 Carat Engagement Rings

Materials

Diamond, 18k Gold

Sunita Nahata Aquamarine 6.10ct. Fancy Ring in 18K White Gold with Diamond.
Located in Hong Kong, HK
This collection features an array of aquamarines with an icy blue hue that is as cool as it gets! Accented with diamonds these rings are made in white and present a classic yet elega...
Category

21st Century and Contemporary Thai Contemporary 6 Carat Engagement Rings

Materials

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

GIA Certified 6 Carat Fancy Yellow Cushion Cut with Half Moons Diamond Ring
Located in Mumbai, IN
Discover the GIA Certified 6 Carat Canary Fancy Yellow Cushion Cut with Half Moons Diamond Ring, crafted in 18K gold. A radiant masterpiece...
Category

2010s Indian Modern 6 Carat Engagement Rings

Materials

Diamond, Yellow Diamond, 18k Gold, 22k Gold, Rose Gold, White Gold, Yell...

Natural Blue Aquamarine Gemstone 3.21 cts in 14K Yellow Gold Ring with Diamonds
Located in Los Angeles, CA
This delicately handcrafted ring features a 3.21 carat aquamarine set in a 14K yellow gold setting. The aquamarine, with its soft and captivating color, comes to life in this elegant...
Category

21st Century and Contemporary Unknown 6 Carat Engagement Rings

Materials

Aquamarine, Diamond, Yellow Gold

Brown Smoky Quartz Diamond Halo 14K Rose Gold Statement Cocktail Ring
Located in Oakton, VA
A striking Smoky Quartz and Diamond Ring, featuring a captivating dark brown smoky quartz set in a delicate gold band, adorned with intricate diamond accents in brown and white color...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Diamond, Quartz, 14k Gold, Rose Gold

White South Sea Pearl Pink Sapphire Diamonds Halo Detail 18K White Gold Ring
Located in Oakton, VA
This striking ring features a magnificent, luminous white south sea pearl at its center. The pearl is encircled by a vibrant array of pink sapphires and rubies and white diamonds, ad...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Diamond, South Sea Pearl, Ruby, Pink Sapphire, 18k Gold, White Gold

Octagon Shape Blue Aquamarine Diamond Pave 14K White Gold Cocktail Ring
Located in Oakton, VA
This elegant ring is crafted in the United States. It features a striking rectangular blue aquamarine, set in a polished metal band. The band is adorned with intricate detailing and ...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Aquamarine, Diamond, 14k Gold, White Gold

Natural Emerald Diamond Ring 14k Gold 6.1 TCW Certified
Located in Brooklyn, NY
Natural Finely Faceted Quality Emerald Diamond Ring Size 6.75 14k Gold 6.1 TCW Certified $6,950 114425 This is a Unique Custom Made Glamorous Piece of Jewelry Nothing says, “I Love...
Category

2010s American 6 Carat Engagement Rings

Materials

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

Pink Red Ruby Cabochon Cluster Diamond Pave Rose Gold Statement Cocktail Ring
Located in Oakton, VA
This exquisite piece features a cluster of vibrant pink red rubies set in a luxurious gold band. The stones are arranged in a captivating dome shape, creating a bold and eye-catching...
Category

21st Century and Contemporary 6 Carat Engagement Rings

Materials

Diamond, Ruby, 14k Gold, Rose Gold

6.60 carat total weight round brilliant cut diamond rose gold ring
Located in Chicago, IL
A 6.6-carat total weight round brilliant cut diamond signet ring in 14k rose gold. This ring weighs 15.5 grams and is size 6.75, wit...
Category

2010s Italian Modern 6 Carat Engagement Rings

Materials

Diamond, Platinum, Rose Gold

Shop 6-Carat Diamond Rings and Other Engagement Rings on 1stDibs

Looking for a 6-carat diamond engagement ring?

Shopping for the right antique, new or vintage engagement ring can prove daunting. Whether you’re looking for that perfect Art Deco engagement ring, a vintage sapphire engagement ring or a fashionable contemporary accessory, it’s important to choose a style that speaks to you.

Rings have long been signifiers of marriage and committed relationships. The modern diamond engagement ring can be traced back to 1477, when Archduke Maximilian of Austria commissioned an expensive diamond ring for his betrothed. Diamond rings subsequently became extremely popular among the European aristocracy. Later, during the Victorian era, the popularity of diamond engagement rings had filtered down to the middle class, owing to the increasing accessibility — and affordability — of gold and diamonds.

Authentic antique Victorian-era engagement rings were frequently set in rose or yellow gold and they are highly collectible. Designs for Victorian engagement rings often featured repoussé work and chasing, in which patterns are hammered into the metal. Diamonds were likely to be small rose- or old-mine-cut (the ancestor of today’s cushion-cut) stones. The former are often associated with antique styles like Victorian or Georgian, as rose-cut diamonds are uncommon in modern jewelry. The diamonds were typically set in a group of five in a band or as a solitaire.

Victorian-era engagement rings also saw other gemstones accompanying diamonds. Small seed pearls and moonstones were popular. Other sentimental and romantic motifs such as hearts and stars took hold as well. When Prince Albert became engaged to Queen Victoria, he gave her a serpent ring with emerald eyes, her birthstone. This initiated a widespread craze for snake jewelry.

In 1886, esteemed American luxury firm Tiffany Co. introduced its solitaire diamond design, which is still among the most popular styles of engagement rings. The Tiffany Setting raises the stone above the band on six prongs, allowing its facets to catch the light and reflect through the stone.

French jewelry house Cartier, which pioneered the use of platinum in fine jewelry and helped define Art Deco, ​​sought to render the diamonds in their engagement rings and other rings as brilliantly as possible. The brand’s timeless Solitaire 1895 engagement ring gave the impression of delicate lace.

Edwardian engagement rings and, afterward, Art Deco engagement rings that followed in the wake of Queen Victoria’s death in 1901 would be characterized by complex geometric designs and platinum settings. Owing to the Art Nouveau movement, nature was a major theme for Edwardian jewelry, while the diamond ring designs of the Art Deco period were inspired by Cubism as well as ancient Egypt. Art Deco engagement rings are bold and colorful and feature gems cut in nontraditional ways.

Engagement rings designed during World War II were made from two-toned metals and smaller stones. Large stones were scarce, and platinum was reserved for the military. Postwar engagement rings were intended to be simpler and focused on the beauty of the diamond.

In 1947, De Beers Consolidated Mines, with the support of Philadelphia ad agency N.W. Ayer Son, introduced the slogan “A diamond is forever” in a marketing campaign that emphasized a connection between diamonds and romance. Diamond sales skyrocketed, and diamond engagement rings became intertwined with the post–World War II marriage boom, which coincided with the ascension of specific diamond cuts.

The round brilliant cut, which consists of an astounding 58 facets, continues to be the most popular cut to this day. Jewelers such as Harry Winston had already gained a reputation for his talents by the time the De Beers campaign debuted, and he is said to have favored emerald-cut diamonds.

When it comes to carat weight and finding the perfect 6-carat diamond ring, you'll want to become familiar with the 4Cs, which is the official grading system that was established by the Gemological Institute of America (GIA).

According to the GIA, “Diamonds are weighed to a thousandth (0.001) of a carat and then rounded to the nearest hundredth, or point. Over a carat, diamond weights are usually expressed in carats and decimals.” Out of all the 4Cs, the weight of the diamond is the most scientific and less a matter of opinion. But the weight is also not the most important signifier of a stone’s value. A three-carat gem can be less valuable than a one-carat stone, for example, if all of the other attributes are of lesser quality in the larger diamond. 

For everything from understanding the 4Cs to choosing between antique, vintage, contemporary and custom styles, get expert tips to help you find just the right ring. Additionally, explore our buying guides for a close look at antique engagement rings, Art Deco engagement rings and vintage engagement rings

When you’re ready to mark your momentous occasion, find 6-carat diamond rings and other engagement rings on 1stDibs.