Lab Diamond Round

This collection holds loose round brilliant lab grown diamonds, sold as single stones rather than set in jewelry. The round brilliant is the classic diamond shape, cut with many facets to return as much light and sparkle as possible. Sizes run from well under one carat to large stones of up to eight carats.

Colors and clarity

The stones here are colorless, mostly D, E, F or G color, with clarity from VVS1 to SI2. Each listing names the carat weight, color and clarity of that stone in its title, and some also name a grading report.

How to choose a round stone

Rounds are the most forgiving shape for color and clarity, because their facets hide small marks well. Start with the carat weight you want, then choose a color grade: D to F look icy white, while G is near colorless. For clarity, VVS and VS stones look clean to the eye. Looking for a finished ring instead? Browse our lab diamond engagement rings, solitaire rings and halo rings.

FAQs

Are these real diamonds?

Yes. Lab grown diamonds are real diamonds with the same chemistry as mined ones. Our comparison guide explains how they differ from moissanite.

How big will the stone look?

Our diamond size chart shows typical face-up sizes by carat weight, which helps you compare stones.

Is the stone set in jewelry?

No. These are loose stones sold on their own. Our support team (10 am to 7 pm) can answer questions about a stone before you order.

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Round brilliant lab grown diamonds
0.43 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.43 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$65
$65 $78
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0.42 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.42 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$65
$65 $78
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0.36 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.36 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$115
$115 $138
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0.33 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.33 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$55
$55 $66
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0.31 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.31 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$80
$80 $96
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0.51 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.51 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$75
$75 $90
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0.48 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.48 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$80
$80 $96
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0.47 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.47 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$59
$59 $71
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0.37 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.37 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$59
$59 $71
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0.30 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

0.30 Ct Round Cut Lab Grown Diamond - E Color, SI1 Clarity

$80
$80 $96
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0.47 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.47 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$68
$68 $82
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0.48 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.48 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$60
$60 $72
Save 16%
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0.46 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.46 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$60
$60 $72
Save 16%
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0.45 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.45 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$70
$70 $84
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0.43 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.43 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$66
$66 $79
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0.44 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.44 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$60
$60 $72
Save 16%
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0.42 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.42 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$58
$58 $70
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0.41 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.41 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$60
$60 $72
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0.40 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.40 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$45
$45 $54
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0.49 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.49 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$71
$71 $85
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0.38 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.38 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$64
$64 $77
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0.37 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.37 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$60
$60 $72
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0.36 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.36 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$61
$61 $73
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0.35 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.35 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$58
$58 $70
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0.34 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.34 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$58
$58 $70
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0.33 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.33 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$68
$68 $82
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0.32 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.32 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$66
$66 $79
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0.31 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.31 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$65
$65 $78
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0.30 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

0.30 Ct Round Cut Lab Grown Diamond - D Color, SI1 Clarity

$62
$62 $74
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1.05 Ct Round Cut Fancy Vivid Pink Lab Grown Diamond - VS2 Clarity

1.05 Ct Round Cut Fancy Vivid Pink Lab Grown Diamond - VS2 Clarity

$156
$156 $195
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1.01 Ct Round Cut Fancy Vivid Blue Lab Grown Diamond - VS2 Clarity

1.01 Ct Round Cut Fancy Vivid Blue Lab Grown Diamond - VS2 Clarity

$150
$150 $188
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1.06 Ct Round Cut Fancy Intense Pink Lab Grown Diamond - VS2 Clarity

1.06 Ct Round Cut Fancy Intense Pink Lab Grown Diamond - VS2 Clarity

$144
$144 $180
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1.02 Ct Round Cut Fancy Vivid Green Lab Grown Diamond - VS2 Clarity

1.02 Ct Round Cut Fancy Vivid Green Lab Grown Diamond - VS2 Clarity

$116
$116 $145
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1.02 Ct Round Cut Fancy Vivid Green Lab Grown Diamond - VS2 Clarity

1.02 Ct Round Cut Fancy Vivid Green Lab Grown Diamond - VS2 Clarity

$116
$116 $145
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1.02 Ct Round Cut Fancy Vivid Blue Lab Grown Diamond - VS2 Clarity

1.02 Ct Round Cut Fancy Vivid Blue Lab Grown Diamond - VS2 Clarity

$155
$155 $194
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1.01 Ct Round Cut Fancy Vivid Green Lab Grown Diamond - VS2 Clarity

1.01 Ct Round Cut Fancy Vivid Green Lab Grown Diamond - VS2 Clarity

$146
$146 $183
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