3 Carat Lab Grown Diamond Rings

They say 3’s a charm and we couldn’t agree more. Especially when it comes to a lab grown diamond in a luxurious 3 carat size.

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Natural

Lab Grown

Moissanite

57 products

Lab Grown Diamond

Lucy Lab Grown Diamond Ring Oval

3.5 Total Carat · Oval · Hidden Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,340

From $1,760

44% off

Lab Grown Diamond

Sophia Lab Grown Diamond Ring

3.5 Total Carat · Pear · Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,500

From $1,840

44% off

Lab Grown Diamond

Audrey Lab Grown Diamond Ring

3.5 Total Carat · Elongated Radiant · Side Stones · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,120

From $1,640

44% off

Lab Grown Diamond

Stephanie Lab Grown Diamond Ring

3.3 Total Carat · Oval · Side Stones · 14K White Gold

3.3 1.3 1.8 2.3 +7 Variants

$3,100

From $1,640

44% off

Lab Grown Diamond

Skylar Lab Grown Diamond Ring

3.5 Total Carat · Elongated Radiant · 3 Stones · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,750

From $1,930

45% off

Lab Grown Diamond

Royal Lab Grown Diamond Ring

3.5 Total Carat · Emerald · Side Stones · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,190

From $1,570

47% off

Lab Grown Diamond

Bell Lab Grown Diamond Ring

3.4 Total Carat · Oval · Side Stones · 14K White Gold

3.4 1.4 1.9 2.4 +7 Variants

$2,840

From $1,470

44% off

Lab Grown Diamond

Kamala Lab Grown Diamond Ring Oval

3.5 Total Carat · Oval · 3 Stones · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,420

From $1,660

44% off

Lab Grown Diamond

Lola Lab Grown Diamond Ring

3.5 Total Carat · Round · Hidden Halo · 14K White Gold

3.5 3.0 4.0 5.0 +7 Variants

$4,320

From $2,260

47% off

Lab Grown Diamond

Phoenix Lab Grown Diamond Ring Emerald

3.0 Total Carat · Emerald · Solitaire · 14K White Gold

3.0 1.0 1.5 2.0 +7 Variants

$2,500

From $1,280

45% off

Lab Grown Diamond

Keyshawna Lab Grown Diamond Ring

3.5 Total Carat · Pear · 3 Stones · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,550

From $1,820

45% off

Lab Grown Diamond

Joana Lab Grown Diamond Ring Elongated Radiant

3.5 Total Carat · Elongated Radiant · Hidden Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,970

From $2,200

42% off

Lab Grown Diamond

Valeria Lab Grown Diamond Ring

3.5 Total Carat · Round · Hidden Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,250

From $1,720

44% off

Lab Grown Diamond

Molly Lab Grown Diamond Ring Round

3.0 Total Carat · Round · Side Stones · 14K White Gold

3.0 2.0 2.5 4.0 +7 Variants

$3,670

From $1,800

51% off

Lab Grown Diamond

Harriet Lab Grown Diamond Ring

3.1 Total Carat · Oval · Hidden Halo · 14K White Gold

3.1 1.1 1.6 2.1 +7 Variants

$2,720

From $1,420

44% off

Lab Grown Diamond

Amanda Lab Grown Diamond Ring

3.0 Total Carat · Elongated Cushion · 3 Stones · 14K White Gold

3.0 2.0 2.5 4.0 +7 Variants

$3,840

From $1,970

49% off

Lab Grown Diamond

Marina Lab Grown Diamond Ring

3.5 Total Carat · Elongated Radiant · Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,470

From $1,860

44% off

Lab Grown Diamond

Cruz Lab Grown Diamond Ring

1.5 Total Carat · Emerald · 3 Stones · 14K White Gold

1.5 2.0 2.5 3.0 +8 Variants

$4,340

From $2,320

26% off

Lab Grown Diamond

Stephanie Lab Grown Diamond Ring

3.3 Total Carat · Princess · Side Stones · 14K White Gold

3.3 1.3 1.8 2.3 +7 Variants

$3,040

From $1,600

44% off

Lab Grown Diamond

Skylar Lab Grown Diamond Ring Round

3.5 Total Carat · Round · 3 Stones · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,550

From $1,820

45% off

Lab Grown Diamond

Jessica Lab Grown Diamond Ring Round

3.0 Total Carat · Round · Solitaire · 14K White Gold

3.0 1.0 1.5 2.0 +7 Variants

$2,550

From $1,300

45% off

Lab Grown Diamond

Celeste Lab Grown Diamond Ring

3.5 Total Carat · Square Cushion · Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,350

From $1,780

44% off

Lab Grown Diamond

Giselle Lab Grown Diamond Ring

3.5 Total Carat · Round · Side Stones · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,570

From $1,840

45% off

Lab Grown Diamond

Luciana Lab Grown Diamond Ring

3.5 Total Carat · Elongated Cushion · Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,550

From $1,880

44% off

Lab Grown Diamond

Adaline Lab Grown Diamond Ring

3.0 Total Carat · Pear · Solitaire · 14K White Gold

3.0 1.0 1.5 2.0 +7 Variants

$2,600

From $1,340

45% off

Lab Grown Diamond

Joana Lab Grown Diamond Ring Elongated Cushion

3.5 Total Carat · Elongated Cushion · Hidden Halo · 14K White Gold

3.5 1.5 2.0 2.5 +7 Variants

$3,970

From $2,200

42% off

Lab Grown Diamond

Priscilla Lab Grown Diamond Ring

3.1 Total Carat · Elongated Cushion · Hidden Halo · 14K White Gold

3.1 1.1 1.6 2.1 +7 Variants

$2,740

From $1,420

44% off

Lab Grown Diamond

Samantha Lab Grown Diamond Ring Round

3.15 Total Carat · Round · Side Stones · 14K White Gold

3.15 1.15 1.65 2.15 +7 Variants

$3,150

From $1,640

44% off

Lab Grown Diamond

Lissete Lab Grown Diamond Ring

3.65 Total Carat · Elongated Cushion · Halo · 14K White Gold

3.65 1.65 2.15 2.65 +7 Variants

$4,000

From $2,020

43% off

Lab Grown Diamond

Emanuela Lab Grown Diamond Ring

1.5 Total Carat · Oval · 3 Stones · 14K White Gold

1.5 2.0 2.5 3.0 +8 Variants

$3,370

From $1,720

30% off

Lab Grown Diamond

Viola Lab Grown Diamond Ring

3.6 Total Carat · Emerald · 3 Stones · 14K White Gold

3.6 1.6 2.1 2.6 +7 Variants

$4,320

From $2,260

44% off

Lab Grown Diamond

Milani Lab Grown Diamond Ring

3.0 Total Carat · Oval · Solitaire · 14K White Gold

3.0 1.0 1.5 2.0 +7 Variants

$2,990

From $1,520

45% off

Lab Grown Diamond

Alice Lab Grown Diamond Ring

3.8 Total Carat · Square Cushion · Halo · 14K White Gold

3.8 1.8 2.3 2.8 +7 Variants

$3,590

From $1,910

43% off

Lab Grown Diamond

Jessica Lab Grown Diamond Ring Princess

3.0 Total Carat · Princess · Solitaire · 14K White Gold

3.0 1.0 1.5 2.0 +7 Variants

$2,720

From $1,400

45% off

Lab Grown Diamond

Nidia Lab Grown Diamond Ring Marquise

3.1 Total Carat · Marquise · Side Stones · 14K White Gold

3.1 2.1 2.6 4.1 +7 Variants

$3,970

From $2,040

48% off

Own the Moment with a Stunning Ring With a 3 Carat Lab Grown Diamond

Some rings whisper. This one doesn't. A 3 carat lab grown diamond engagement ring owns the room the moment it walks in, and everyone in it notices.

At this size, the craftsmanship becomes part of the story. The precision of the cut, the sharpness of the facet angles, the polish, the clarity, all of it is visible and all of it matters. A 3 carat stone leaves nowhere to hide, and with a lab grown diamond, that's not a concern. These stones are grown under conditions that eliminate the inclusions and color inconsistencies common in mined diamonds of this size. What you get is a stone that looks exactly the way a diamond of this caliber should look.

The result is something people genuinely stop to admire. The brilliance is immediate, the elegance is undeniable, and the confidence it takes to wear a ring like this tends to come naturally once it's on your finger.

At Best Brilliance, every 3 carat lab grown diamond ring is handcrafted with the attention to detail this size demands. Because a diamond this exceptional deserves a setting that honors it.