Home 1 Carat Lab Grown Diamond Rings

1 Carat Lab Grown 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 Trillion Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

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

Select Bezel Solitaire Trillion · 18K Yellow Gold

From $2,700

Lab Diamond Included
Eartha Select Hidden Halo Princess Cut Lab Diamond Engagement Ring in Platinum, shown on hand, angled | RockHer

The Eartha Select Hidden Halo Princess Cut Lab Diamond Engagement Ring in Platinum

Select Hidden Halo Princess Cut · Platinum

From $3,325

Lab Diamond Included
Dylan Select Halo Round Lab Diamond Engagement Ring in 14K Rose Gold, shown on hand, angled | RockHer

The Dylan Select Halo Round Lab Diamond Engagement Ring in 14K Rose Gold

Select Halo Round · 14K Rose Gold

From $3,340

Lab Diamond Included
Duran Select Simple Bezel Solitaire Oval Lab Diamond Engagement Ring in 18K White Gold, shown on hand, angled | RockHer

The Duran Select Simple Bezel Solitaire Oval Lab Diamond Engagement Ring in 18K White Gold

Select Simple Bezel Solitaire Oval · 18K White Gold

From $3,505

Lab Diamond Included
Anita Select Three Stone Radiant Cut Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

The Anita Select Three Stone Radiant Cut Lab Diamond Engagement Ring in 18K Yellow Gold

Select Three Stone Radiant Cut · 18K Yellow Gold

From $4,440

Lab Diamond Included
Carrie Select Pavé Round Lab Diamond Engagement Ring in 18K Yellow Gold, on hand, angled | RockHer

The Carrie Select Pavé Round Lab Diamond Engagement Ring in 18K Yellow Gold

Select Pavé Round · 18K Yellow Gold

From $3,260

Lab Diamond Included
Custom Design
Don't see her ring? We'll make the one that doesn't exist yet.
Start a Custom Design
Amy Select Halo Round Lab Diamond Engagement Ring in 14K Rose Gold, on hand, angled | RockHer

The Amy Select Halo Round Lab Diamond Engagement Ring in 14K Rose Gold

Select Halo Round · 14K Rose Gold

From $4,420

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

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

Select Cathedral Emerald Cut · 18K White Gold

From $3,580

Lab Diamond Included
Aretha Select Halo Princess Cut Lab Diamond Engagement Ring in 18K Yellow Gold, on hand, angled | RockHer

The Aretha Select Halo Princess Cut Lab Diamond Engagement Ring in 18K Yellow Gold

Select Halo Princess Cut · 18K Yellow Gold

From $4,790

Lab Diamond Included
Genesis Select Halo Round Lab Diamond Engagement Ring in Platinum, shown on hand, angled | RockHer

The Genesis Select Halo Round Lab Diamond Engagement Ring in Platinum

Select Halo Round · Platinum

From $5,620

Lab Diamond Included
Elliott Select Hidden Halo Pavé Oval Lab Diamond Engagement Ring in 14K Rose Gold, front view | RockHer

The Elliott Select Hidden Halo Pavé Oval Lab Diamond Engagement Ring in 14K Rose Gold

Select Hidden Halo Pavé Oval · 14K Rose Gold

From $3,695

Lab Diamond Included
Lana Select Hidden Halo Emerald Cut Lab Diamond Engagement Ring in 18K White Gold, shown on hand, angled | RockHer

The Lana Select Hidden Halo Emerald Cut Lab Diamond Engagement Ring in 18K White Gold

Select Hidden Halo Emerald Cut · 18K White Gold

From $3,750

Lab Diamond Included
Annie Select Halo Radiant Cut Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

The Annie Select Halo Radiant Cut Lab Diamond Engagement Ring in 18K Yellow Gold

Select Halo Radiant Cut · 18K Yellow Gold

From $6,625

Lab Diamond Included
Hymn Select Halo Round Lab Diamond Engagement Ring in Platinum, shown on hand, angled | RockHer

The Hymn Select Halo Round Lab Diamond Engagement Ring in Platinum

Select Halo Round · Platinum

From $4,635

Lab Diamond Included
ROSI™
Every diamond scored by gemological intelligence before it ships.
How ROSI™ Works
Sade Select Halo Oval Lab Diamond Engagement Ring in 14K Rose Gold, shown on hand, angled | RockHer

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

Select Halo Oval · 14K Rose Gold

From $4,030

Lab Diamond Included
Tina Select Triple Row Pavé Round Lab Diamond Engagement Ring in 18K White Gold, on hand, angled | RockHer

The Tina Select Triple Row Pavé Round Lab Diamond Engagement Ring in 18K White Gold

Select Triple Row Pavé Round · 18K White Gold

From $4,870

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

The Alice Select Three Stone Round Lab Diamond Engagement Ring in 14K Rose Gold

Select Three Stone Round · 14K Rose Gold

From $4,350

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
Angelica Select Three Stone Oval Lab Diamond Engagement Ring in 14K Rose Gold, shown on hand, angled | RockHer

The Angelica Select Three Stone Oval Lab Diamond Engagement Ring in 14K Rose Gold

Select Three Stone Oval · 14K Rose Gold

From $7,620

Lab Diamond Included
Annabelle Select Pavé Oval Lab Diamond Engagement Ring in 18K Yellow Gold, shown on hand, angled | RockHer

The Annabelle Select Pavé Oval Lab Diamond Engagement Ring in 18K Yellow Gold

Select Pavé Oval · 18K Yellow Gold

From $4,285

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

The Billie Select Halo Round Lab Diamond Engagement Ring in 18K Yellow Gold

Select Halo Round · 18K Yellow Gold

From $4,975

Lab Diamond Included
Etta Select Halo Round Lab Diamond Engagement Ring in Platinum, on hand, angled | RockHer

The Etta Select Halo Round Lab Diamond Engagement Ring in Platinum

Select Halo Round · Platinum

From $5,225

Lab Diamond Included
Ivy Select Halo Oval Lab Diamond Engagement Ring in 14K Rose Gold, shown on hand, angled | RockHer

The Ivy Select Halo Oval Lab Diamond Engagement Ring in 14K Rose Gold

Select Halo Oval · 14K Rose Gold

From $4,370

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

The Everly Select Halo Round Lab Diamond Engagement Ring in 18K Yellow Gold

Select Halo Round · 18K Yellow Gold

From $4,560

Lab Diamond Included
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The Select Collection
The Select Collection
Complete lab diamond rings
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Engagement Rings Made to Order in Los Angeles

1 carat lab grown diamond 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 lab grown 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 Lab Grown Diamond Rings

The classic one carat, in an IGI certified lab grown diamond that lets her stone go further. Choose a setting made to order in our Los Angeles atelier in platinum or solid gold and pair it with a 1 carat lab grown diamond, or choose a Select ring with the diamond already included.

One fair price, complimentary insured U.S. shipping, and a lifetime warranty against manufacturing defects.

One Carat · Lab Diamond

1 Carat Lab Grown Diamond Rings

A 1 carat lab grown diamond is a real diamond, carbon in the same crystal structure as a natural diamond, grown in weeks rather than over a billion years, and graded by IGI on the same cut, color and clarity scales. One carat is the weight the trade has measured engagement rings against for a century: a 1 carat round measures about 6.5 millimeters across, large enough to carry a setting on its own and small enough to wear every day without thinking about it.

Every ring in this collection is made to order in our Los Angeles atelier. Choose a setting, choose a 1 carat lab diamond in the shape it takes, and the ring is modeled around that diamond's exact measurements before it is made.

One fair price

The setting carries one price and the diamond carries one price. The ring is the sum. No codes, no strikethroughs, no timing the purchase.

IGI certified

Every lab diamond in our inventory is graded by IGI, and our gemologist verifies it against its certificate before it is set.

Resizing and warranty

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

What 1 carat looks like, by shape

Carat is weight, not size. The same 1 carat spreads differently depending on the shape, which is why an oval or a marquise reads larger on the hand than a round of the same weight.

6.5 mm
Round
7.5 × 5.5
Oval
5.5 × 5.5
Cushion
7 × 5
Emerald
8 × 5
Pear

Typical measurements for well cut diamonds at 1.00 carat. The certificate for the exact diamond you choose states its own.

Two ways to own one

Build your ring. Choose a setting below, then pair it with a 1 carat lab diamond from our inventory. John Anderson, our Lead Gemologist, reviews the shortlist with you and tells you which of two diamonds with the same grades will look better on the hand.

Choose a Select ring. The Select rings arrive complete: an IGI certified lab diamond already matched to the setting, with 1 carat as one of the carat weights you can choose.

Build Your Ring Explore Select Rings

The grades on a certificate do not tell you how a diamond looks. Two 1 carat lab diamonds, both F VS1, can be a beautiful diamond and a dull one. Cut is where the difference lives, and it is the one grade worth paying for.

How to choose a 1 carat lab diamond

  • Cut first. For rounds, Excellent cut on the IGI report. For fancy shapes, which IGI does not cut grade, look at the depth and table percentages and ask us to review the diamond; the certificate alone will not tell you.
  • Color. Lab diamonds are plentiful in the high colors, so there is no reason to go below G for a 1 carat in white metal, or H in yellow or rose gold.
  • Clarity. VS1 or VS2 is clean to the eye at 1 carat in every shape. Paying for VVS buys nothing you can see.
  • Shape. Round for the most light. Oval for the most spread. Cushion and emerald cut for a look that reads as older than the ring. The setting is modeled to whichever you choose.
  • Setting. At 1 carat, a plain solitaire shows the diamond honestly and a hidden halo adds light from the side without changing the face. A halo makes it read closer to 1.5 carats from above.

Related collections

Lab Diamond Engagement Rings · 2 Carat Lab Grown Diamond Rings · 1 Carat Diamond Rings · Round Engagement Rings · Oval Engagement Rings

Talk to a jeweler before you decide

Two diamonds with the same certificate can look different on the hand. 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

Is a 1 carat lab grown diamond a real diamond?

Yes. A lab grown diamond is carbon in the same crystal structure as a natural diamond, with the same hardness, the same light performance and the same grading scales. The difference is origin: grown in a laboratory over weeks rather than formed in the earth. A gemologist needs laboratory equipment to tell the two apart, and IGI states the origin on the certificate.

How big is a 1 carat lab diamond?

A well cut 1 carat round measures about 6.5 millimeters across. An oval runs about 7.5 by 5.5 millimeters, a cushion about 5.5 by 5.5, an emerald cut about 7 by 5, a pear about 8 by 5. Carat is weight, so the exact measurements for any diamond are on its certificate.

Does a 1 carat lab diamond cost less than a 1 carat natural diamond?

Yes, by a wide margin, because lab diamonds can be grown to order and natural diamonds cannot. The setting, the production and the warranty are the same either way. The ring page shows the one price for each.

Which grades should I choose at 1 carat?

Excellent cut 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 at 1 carat.

Will a 1 carat lab diamond hold up for daily wear?

Yes. It is a diamond, the hardest material used in jewelry, and it wears exactly as a natural diamond does. The ring carries a lifetime warranty on its making.

How long does a 1 carat lab 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.