Home 1 Carat Marquise Diamond Rings

1 Carat Marquise Diamond Rings

Engagement ring settings in platinum and gold, solitaire, halo, three stone and vintage designs, made to order in our Los Angeles atelier.

Start with a Diamond →
Agnes Select Bezel Solitaire In Marquise Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

The Agnes Select Bezel Solitaire In Marquise Lab Diamond Engagement Ring in 18K Yellow Gold

Select Bezel Solitaire In Marquise · 18K Yellow Gold

From $2,610

Lab Diamond Included
Dylan Select Petite French Pavé Halo Marquise Lab Diamond Engagement Ring in Platinum, shown on hand, angled | RockHer

The Dylan Select Petite French Pavé Halo Marquise Lab Diamond Engagement Ring in Platinum

Select Petite French Pavé Halo Marquise · Platinum

From $4,290

Lab Diamond Included
Anita Select Three Stone Marquise Lab Diamond Engagement Ring in 14K Rose Gold, on hand, angled | RockHer

The Anita Select Three Stone Marquise Lab Diamond Engagement Ring in 14K Rose Gold

Select Three Stone Marquise · 14K Rose Gold

From $3,760

Lab Diamond Included
Donna Select Cathedral Marquise Lab Diamond Engagement Ring in 18K White Gold, shown on hand, angled | RockHer

The Donna Select Cathedral Marquise Lab Diamond Engagement Ring in 18K White Gold

Select Cathedral Marquise · 18K White Gold

From $3,670

Lab Diamond Included
Sade Select Halo Marquise Lab Diamond Engagement Ring in 14K Rose Gold, on hand, angled | RockHer

The Sade Select Halo Marquise Lab Diamond Engagement Ring in 14K Rose Gold

Select Halo Marquise · 14K Rose Gold

From $3,760

Lab Diamond Included
Taylor Select Pavé Halo Marquise Lab Diamond Engagement Ring in Platinum, on hand, angled | RockHer

The Taylor Select Pavé Halo Marquise Lab Diamond Engagement Ring in Platinum

Select Pavé Halo Marquise · Platinum

From $6,980

Lab Diamond Included
Custom Design
Don't see her ring? We'll make the one that doesn't exist yet.
Start a Custom Design
Angelica Select Marquise 18K Yellow Gold

The Angelica Select Three Stone Matched Solitaire Marquise Lab Diamond Engagement Ring in 18K Yellow Gold

Select Three Stone Matched Solitaire Marquise · 18K Yellow Gold

From $8,255

Lab Diamond Included
Etta Select Halo Marquise Lab Diamond Engagement Ring in 18K White Gold, on hand, angled | RockHer

The Etta Select Halo Marquise Lab Diamond Engagement Ring in 18K White Gold

Select Halo Marquise · 18K White Gold

From $4,480

Lab Diamond Included
Gladys Select Solitaire Marquise Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

The Gladys Select Solitaire Marquise Lab Diamond Engagement Ring in 18K Yellow Gold

Select Solitaire Marquise · 18K Yellow Gold

From $3,760

Lab Diamond Included
Crimson Select Halo Marquise Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

The Crimson Select Halo Marquise Lab Diamond Engagement Ring in 18K Yellow Gold

Select Halo Marquise · 18K Yellow Gold

From $4,315

Lab Diamond Included
Floria Select Solitaire Marquise Lab Diamond Engagement Ring in 14K Rose Gold, on hand, front | RockHer

The Floria Select Solitaire Marquise Lab Diamond Engagement Ring in 14K Rose Gold

Select Solitaire Marquise · 14K Rose Gold

From $2,295

Lab Diamond Included
Carole Select Two Row Pavé Split Shank Marquise Lab Diamond Engagement Ring in 18K White Gold, alternate angle | RockHer

The Carole Select Two Row Pavé Split Shank Marquise Lab Diamond Engagement Ring in 18K White Gold

Select Two Row Pavé Split Shank Marquise · 18K White Gold

From $4,665

Lab Diamond Included
Fiona Select Halo Marquise Lab Diamond Engagement Ring in 18K Yellow Gold, on hand, angled | RockHer

The Fiona Select Halo Marquise Lab Diamond Engagement Ring in 18K Yellow Gold

Select Halo Marquise · 18K Yellow Gold

From $4,470

Lab Diamond Included
Whitney Select Double Halo Marquise Lab Diamond Engagement Ring in Platinum, shown on hand, angled | RockHer

The Whitney Select Double Halo Marquise Lab Diamond Engagement Ring in Platinum

Select Double Halo Marquise · Platinum

From $6,425

Lab Diamond Included
ROSI™
Every diamond scored by gemological intelligence before it ships.
How ROSI™ Works
Norah Select Pavé Marquise Lab Diamond Engagement Ring in 14K Rose Gold, detail | RockHer

The Norah Select Pavé Marquise Lab Diamond Engagement Ring in 14K Rose Gold

Select Pavé Marquise · 14K Rose Gold

From $3,170

Lab Diamond Included
Alannah Select Halo Marquise Lab Diamond Engagement Ring in 18K White Gold, shown on hand, angled | RockHer

The Alannah Select Halo Marquise Lab Diamond Engagement Ring in 18K White Gold

Select Halo Marquise · 18K White Gold

From $5,570

Lab Diamond Included
Janis Select Vintage Solitaire Marquise Lab Diamond Engagement Ring in 18K Yellow Gold, alternate angle | RockHer

The Janis Select Vintage Solitaire Marquise Lab Diamond Engagement Ring in 18K Yellow Gold

Select Vintage Solitaire Marquise · 18K Yellow Gold

From $4,825

Lab Diamond Included
Veronica Select Vintage Solitaire Marquise Lab Diamond Engagement Ring in Platinum, shown on hand, angled | RockHer

The Veronica Select Vintage Solitaire Marquise Lab Diamond Engagement Ring in Platinum

Select Vintage Solitaire Marquise · Platinum

From $4,160

Lab Diamond Included
June Select Three Stone Marquise Lab Diamond Engagement Ring in 14K Rose Gold, detail | RockHer

The June Select Three Stone Marquise Lab Diamond Engagement Ring in 14K Rose Gold

Select Three Stone Marquise · 14K Rose Gold

From $3,840

Lab Diamond Included
Tori Select Solitaire Marquise Lab Diamond Engagement Ring in 18K White Gold, shown on hand, angled | RockHer

The Tori Select Solitaire Marquise Lab Diamond Engagement Ring in 18K White Gold

Select Solitaire Marquise · 18K White Gold

From $3,110

Lab Diamond Included
Roberta Select Solitaire Marquise Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

The Roberta Select Solitaire Marquise Lab Diamond Engagement Ring in 18K Yellow Gold

Select Solitaire Marquise · 18K Yellow Gold

From $3,500

Lab Diamond Included
Isolde Select Knife Edge Solitaire Marquise Lab Diamond Engagement Ring in Platinum, on hand, angled | RockHer

The Isolde Select Knife Edge Solitaire Marquise Lab Diamond Engagement Ring in Platinum

Select Knife Edge Solitaire Marquise · Platinum

From $3,125

Lab Diamond Included
Ellie Select Solitaire Marquise Lab Diamond Engagement Ring in 14K Rose Gold, on hand, front | RockHer

The Ellie Select Solitaire Marquise Lab Diamond Engagement Ring in 14K Rose Gold

Select Solitaire Marquise · 14K Rose Gold

From $2,745

Lab Diamond Included
Juliette Select Cathedral Solitaire Marquise Lab Diamond Engagement Ring in 18K White Gold, on hand, angled | RockHer

The Juliette Select Cathedral Solitaire Marquise Lab Diamond Engagement Ring in 18K White Gold

Select Cathedral Solitaire Marquise · 18K White Gold

From $4,260

Lab Diamond Included
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Engagement Rings Made to Order in Los Angeles

1 carat marquise diamond engagement rings, made to order in our Los Angeles atelier. Every setting is crafted in solid gold or platinum and paired with a GIA or IGI certified diamond scored by ROSI™, gemological intelligence built by our gemologists. One fair price, a 40 day return window on eligible pieces, one complimentary resize within 60 days of delivery, up to 1.5 sizes (U.S.), and a lifetime warranty against manufacturing defects.

Speak with a Gemologist

Not sure where to begin?

One conversation with a gemologist replaces a hundred open tabs. We will guide you the way we would guide a close friend.

John Anderson · Lead Gemologist · (800) 779-1726

Book a Consultation

1 Carat · Marquise

1 Carat Marquise Diamond Rings

The rings on this page are complete: an IGI certified lab diamond already set, with 1 carat as one of the carat weights you can choose on the ring page. A 1 carat marquise measures about 10 × 5 millimeters, the longest outline per carat, so it reads larger on the hand than any other shape at the same weight.

Every ring is made to order in our Los Angeles atelier, modeled around the exact measurements of the diamond before it is made. If you would rather a natural diamond, the same settings are built around a GIA certified 1 carat diamond through the configurator, where you choose the diamond first.

One fair price

The ring page shows one price for the complete ring at each carat weight. No codes, no strikethroughs, no timing the purchase.

IGI and GIA certified

Lab diamonds graded by IGI, natural diamonds graded by GIA. Our gemologist verifies every diamond against its certificate before it is set.

Resizing and warranty

60 day complimentary resizing, lifetime warranty, and the Ring Size Guide before you order.

Two ways to own one

Choose a complete ring below. Pick the design, the metal and the carat weight on the ring page. The lab diamond is already matched to the setting.

Build it around a natural diamond. Choose a GIA certified 1 carat diamond from our inventory, with a ROSI™ Score Report on any diamond you are considering, and John Anderson, our Lead Gemologist, reviews the shortlist with you before the setting is modeled to it.

All Select Rings Build Your Ring

Two 1 carat diamonds with the same certificate can look like different diamonds on the hand. Cut is where the difference lives, and it is the one grade worth paying for. Color and clarity above what the eye can see are paid for and never seen.

Talk to a jeweler before you decide

John Anderson, our Lead Gemologist, compares the candidates with you on the phone or by video. Call 1-800-779-1726 or request a consultation. There is no charge and no obligation.

Frequently Asked Questions

How big is a 1 carat diamond?

A well cut 1 carat marquise measures about 10 × 5 millimeters. Carat is weight, so the exact measurements for any diamond are on its certificate.

Are the rings on this page natural or lab diamonds?

The complete rings shown here are IGI certified lab diamond rings, with 1 carat as one of the carat weights you can choose. The same settings are made around a GIA certified natural 1 carat diamond through our configurator, where you choose the diamond first and the setting is modeled to it.

Which grades should I choose at 1 carat?

Cut first: Excellent on the certificate for a round, or a reviewed cut for a fancy shape. G color or better in platinum and white gold, H or better in yellow and rose gold. VS2 or better clarity. Higher color and clarity grades than these are not visible on the hand.

How long does a 1 carat diamond ring take to make?

8 to 12 business days from the day the diamond is confirmed. The CAD model is built around the measurements on the certificate, the diamond is verified against the certificate by our gemologist, and the ring is finished and inspected in Los Angeles before it ships insured.