3 Carat Lab Grown Diamond Rings

3 Carat Lab Grown Diamond Rings

Quick answer: A 3 carat lab grown diamond ring at Future Jewelry costs between $1,500 and $5,600 USD, compared with $30,000 or more for a mined diamond of similar quality. A 3 carat round diamond measures about 9.3 mm across, and every ring comes with an IGI certificate, free insured shipping and 30 day returns.

3 Carat Diamond Ring: Key Facts

  • Price: $1,500 to $5,600 USD for a 3 carat lab grown diamond ring.
  • Size: about 9.3 mm across for a round, about 11 x 8 mm for an oval.
  • Best value shapes: oval, cushion and radiant usually cost less than round.
  • Recommended grades: E to G color and VS1 to VS2 clarity look flawless to the eye.
  • Certification: every diamond is graded by IGI.
  • Metals: 14K gold, 18K gold or platinum.

A 3 carat diamond is the size most people picture when they imagine a statement engagement ring. It has real presence on the hand without looking oversized, and with a lab grown diamond it costs a fraction of the mined equivalent. Every ring in this collection is set with an IGI certified lab grown diamond in 14K gold, 18K gold or platinum, ships free, and comes with a 30 day return window.

3 Carat Lab Grown Diamond Ring Price by Shape

Shape Starting price (USD) Approximate size Notes
Round $1,546 9.3 mm Most sparkle, classic choice
Oval $1,800 11 x 8 mm Looks largest on the hand, our best seller
Pear $1,900 12 x 8 mm Elongates the finger
Princess $2,300 8 x 8 mm Modern square outline
Emerald cut $2,400 10 x 7.5 mm Step cut, understated glow
Cushion $2,400 8.5 x 8.5 mm Soft corners, vintage feel
Radiant $3,000 9.5 x 7.5 mm Rectangular with brilliant fire

Starting prices are for a solitaire in 14K gold with G to H color and VS2 clarity. The same shapes in E to F color, VS1 or better, 18K gold or platinum, or with a halo or pave band run $3,000 to $5,600. For comparison, a 3 carat mined diamond of similar quality typically sells for $30,000 or more. The lab grown version is chemically and visually identical.

What Sets the Price

  • Shape. Oval, cushion and pear cuts usually cost less than round brilliants at the same weight.
  • Color and clarity. E or F color with VS1 clarity or better looks flawless to the eye and costs more than G or H color with VS2.
  • Metal. 14K gold is the most affordable, 18K gold sits in the middle, and platinum costs the most.
  • Setting. A simple solitaire is the lowest price. Hidden halos, pave bands and three stone designs add diamonds and add cost.

Which 3 Carat Shape Should You Choose?

What Comes With Every Ring

  • IGI certificate confirming carat weight, color, clarity and cut
  • Free insured shipping to Canada and the United States, 1 to 3 week delivery
  • 30 day returns
  • Lifetime warranty on the setting
  • Free resizing on your first adjustment
  • Monthly payments available through Shop Pay Installments

Other sizes: 2 carat lab grown diamond rings, 4 carat lab grown diamond rings and 5 carat lab grown diamond rings. Looking for a matching band? Browse our lab grown diamond wedding bands, or see the full range of lab grown diamond engagement rings.

Curious how a rough crystal becomes a 3 carat center stone? Read where are diamonds found, from rough stone to polished diamond, or our full 3 carat lab grown diamond ring buying guide.

Before You Choose

Still deciding? Our 8 page Lab Grown Diamond Guide covers lab grown vs mined diamonds, lab diamonds vs moissanite, the 4Cs, diamond shapes and how to choose your stone.

READ THE GUIDE

3 Carat Lab Grown Diamond Ring FAQ

How much does a 3 carat lab grown diamond ring cost?

At Future Jewelry, 3 carat lab grown diamond rings cost between $1,500 and $5,600 USD. A round or oval solitaire in 14K gold starts at $1,546 to $1,800. Platinum settings, halo or pave designs, higher color grades and colored diamonds sit at the higher end.

How much is a 3 carat lab grown diamond on its own?

The loose stone is most of the price. A 3 carat G VS2 lab grown diamond is roughly $1,000 to $1,800 depending on shape and cut grade, and an E VS1 is $1,800 to $2,800. The setting adds $400 to $1,500 on top.

How big is a 3 carat diamond?

A 3 carat round diamond measures about 9.3 mm across. An oval of the same weight measures roughly 11 mm by 8 mm, which is why ovals look bigger on the hand.

Which shape looks biggest at 3 carats?

Elongated shapes such as oval, pear, marquise and radiant cover more of the finger and look larger than a round diamond of the same weight.

What color and clarity should I choose for a 3 carat diamond?

Larger diamonds show inclusions more easily, so VS1 or VS2 clarity is a safe choice. For color, E to G looks colorless in white gold or platinum. In yellow or rose gold you can go to H and still see a bright white stone.

Is a 3 carat lab grown diamond a real diamond?

Yes. Lab grown diamonds have the same crystal structure, hardness and sparkle as mined diamonds. The only difference is where they were formed. Every ring here comes with an IGI certificate.

Is a 3 carat ring practical for everyday wear?

Yes. Lower profile settings such as a solitaire or hidden halo sit close to the finger and are comfortable for daily wear.

Last updated: October 2026

3 carat lab diamond engagement ring in rose gold with radiant cut center stone