3 Carat Lab Grown Diamonds

Shop our collection of 3 carat lab grown diamonds, all IGI certified and ready to be set in a custom engagement ring or worn as fine jewelry. Choose from 513 options at 3 carat, in D, E and F color and VVS1, VVS2, VS1 and VS2 clarity, priced from $683.

Round Oval Cushion Pear Emerald Princess Heart Marquise Asscher Radiant Rose CutRose CutOld EuropeanOld EuropeanOld MineOld MinePortuguesePortugueseHalf MoonHalf MoonTapered BaguetteTapered BaguetteBaguetteBaguetteHexagonHexagonKiteKiteTrapezoidTrapezoidTriangleTriangleTrilliantTrilliantHeptagonalHeptagonalPentagonalPentagonalShieldShieldCapsuleCapsuleOctagonalOctagonalStarStarSquareSquareLozengeLozengeCalf HeadCalf HeadBulletBulletFlandersFlandersAshokaAshokaCadillacCadillacLilyLilyCadillac StepCadillac StepButterflyButterflyMovalMovalFlowerFlower

A true statement diamond

A 3 carat round measures about 9.2 to 9.4 mm across, and a 3 carat oval around 11.5 x 8 mm. Mined diamonds of this size are rare and costly; lab grown diamonds are chemically identical and make 3 carats realistic.

Quality at 3 carats

At this size inclusions and tint show more easily. Choose E or F color and VS1 or better, especially in step cuts. Ask for the video and IGI report, and consider a sturdy setting with six prongs or a bezel.

3 Carat Lab Grown Diamonds

Shop our collection of 3 carat lab grown diamonds, all IGI certified and ready to be set in a custom engagement ring or worn as fine jewelry. Choose from 513 options at 3 carat, in D, E and F color and VVS1, VVS2, VS1 and VS2 clarity, priced from $683.

How big is a 3 carat diamond?

Carat measures weight, not size, but weight decides how large a diamond looks. A 3 carat round diamond measures about 9.3 mm across. Fancy shapes such as oval, pear and marquise often look larger than a round of the same weight because more of their weight sits in the visible top of the stone.

How to choose

For a bright, icy look choose D or E color; F color gives the best value while still appearing colorless. VVS1 and VVS2 are the cleanest grades we offer, while VS1 and VS2 are eye-clean and leave more budget for carat weight. Available shapes include Round, Oval, Cushion, Pear, Emerald, Princess, Heart and Marquise and more. Prices in this collection range from $683 to $342,333.

Lab grown vs mined diamonds

A lab grown diamond is created in a controlled environment that recreates the heat and pressure under which natural diamonds form. The result has the same crystal structure, hardness of 10 on the Mohs scale, fire and brilliance as a mined diamond, and it is graded on the same color, clarity and carat scales. The main differences are price, which is typically 70 to 90 percent lower, and a traceable, conflict-free origin.

From loose diamond to finished ring

Pair your diamond with any Northfire setting, from a sleek solitaire to a pavé halo, in white, yellow or rose gold. We handcraft every ring to order and send photos for approval, so your diamond and setting are matched perfectly before the ring ships.

Why buy from Northfire Jewelry

Every diamond is IGI certified, shipped free and fully insured within the USA, and backed by a 30-day return policy. Lab grown diamonds are real diamonds, chemically, physically and optically identical to mined diamonds, at a fraction of the price. Our team can set your diamond in any of our engagement ring designs or create a fully custom ring for you.

Related Searches

Shop 3 Carat by Shape

3 Carat Round3 Carat Oval3 Carat Cushion3 Carat Pear3 Carat Emerald3 Carat Princess3 Carat Radiant3 Carat Marquise3 Carat Asscher3 Carat Heart

Shop 3 Carat by Color

3 Carat D Color3 Carat E Color3 Carat F Color

Shop 3 Carat by Clarity

3 Carat VVS13 Carat VVS23 Carat VS13 Carat VS2

Shop by Carat

1 Carat1.5 Carat2 Carat2.5 Carat3.5 Carat4 Carat4.5 Carat5 Carat6 Carat7 Carat8 Carat9 Carat10 Carat

Shop by Shape

RoundOvalCushionPearEmeraldPrincessRadiantMarquiseAsscherHeart

Shop by Color

D ColorE ColorF Color

Shop by Clarity

VVS1 ClarityVVS2 ClarityVS1 ClarityVS2 Clarity

Got Questions? We Got Answers

Are 3 carat lab grown diamonds real diamonds?
Yes. Lab grown diamonds are real diamonds made of pure carbon with the same hardness, brilliance and chemical structure as mined diamonds. Only their origin is different.
How much do 3 carat lab grown diamonds cost?
Diamonds in this collection are priced from $683 to $342,333, depending on shape, carat, color and clarity.
What size is a 3 carat diamond in mm?
A 3 carat round diamond is about 9.3 mm in diameter. Fancy shapes have similar face-up area spread over their own outline.
Do these diamonds come with a certificate?
Yes. Every diamond is graded by IGI (International Gemological Institute) and ships with its original IGI grading report.
Can I set this diamond in an engagement ring?
Yes. Choose any loose diamond and our jewelers will set it in the Northfire engagement ring of your choice or in a custom design. Contact us and we will guide you.
What is your shipping and return policy?
Shipping is free and fully insured within the USA, and loose diamonds can be returned within 30 days in their original condition.