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  • Lab Grown Diamonds
  • 3 Carat Lab Grown Diamonds
  • Round 3 Carat Lab Grown Diamonds

3 Carat Round Brilliant Lab Grown Diamonds

A 3 carat round brilliant lab grown diamond pairs a substantial carat weight with the character of the round brilliant cut. With 57 to 58 precisely arranged facets, the round brilliant returns more light than any other cut, which is why it remains the most popular and most versatile diamond shape. Browse our certified 3 carat round lab grown diamonds below; each is grown in a matter of weeks in a controlled environment and independently graded, with the full report available.

Shape

Round Diamond Round
Princess Diamond Princess
Oval Diamond Oval
Emerald Diamond Emerald
Cushion Diamond Cushion
Asscher Diamond Asscher
Marquise Diamond Marquise
Pear Diamond Pear
Heart Diamond Heart
Radiant Diamond Radiant

Diamond

Mined
Lab Grown
Either
coloured diamond

Carat Weight

£ +/- 5%

Colour

D
E
F
G
H
I
J

Clarity

FL
IF
VVS1
VVS2
VS1
VS2
SI1
SI2

Finish

Fluorescence Intensity

None
Faint Blue
Very Slight Blue
Slight Blue
Medium Blue
Strong Blue
Very Strong Blue
Advanced Search
diamond
Typical High St. Price £1,123
Today £562 inc. VAT

ROUND 3.04 cts.

Sparkle Factor 87 %

Colour G - Very White

Clarity SI1 - Slight Marks

Diamond ID: 9974824664

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diamond
Typical High St. Price £1,123
Today £562 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 87 %

Colour G - Very White

Clarity SI1 - Slight Marks

Diamond ID: 9970500690

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diamond
Typical High St. Price £1,123
Today £562 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 87 %

Colour G - Very White

Clarity SI1 - Slight Marks

Diamond ID: 9976880846

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diamond
Typical High St. Price £1,145
Today £572 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9974814979

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diamond
Typical High St. Price £1,210
Today £605 inc. VAT

ROUND 3.05 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9975701080

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diamond
Typical High St. Price £1,210
Today £605 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 86 %

Colour E - Colourless

Clarity SI2 - Slight Marks

Diamond ID: 9971163696

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diamond
Typical High St. Price £1,210
Today £605 inc. VAT

ROUND 3.09 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9979137670

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diamond
Typical High St. Price £1,217
Today £608 inc. VAT

ROUND 3.10 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9979286218

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diamond
Typical High St. Price £1,217
Today £608 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9974229981

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diamond
Typical High St. Price £1,217
Today £608 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9976831008

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diamond
Typical High St. Price £1,217
Today £608 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9978691784

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diamond
Typical High St. Price £1,224
Today £612 inc. VAT

ROUND 3.03 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9975869955

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diamond
Typical High St. Price £1,224
Today £612 inc. VAT

ROUND 3.03 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9974154128

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diamond
Typical High St. Price £1,224
Today £612 inc. VAT

ROUND 3.04 cts.

Sparkle Factor 88 %

Colour G - Very White

Clarity VS2 - V.Slight Marks

Diamond ID: 9979849355

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diamond
Typical High St. Price £1,224
Today £612 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 88 %

Colour G - Very White

Clarity VS2 - V.Slight Marks

Diamond ID: 9973644701

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diamond
Typical High St. Price £1,224
Today £612 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 90 %

Colour G - Very White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9975827660

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diamond
Typical High St. Price £1,231
Today £616 inc. VAT

ROUND 3.02 cts.

Sparkle Factor 88 %

Colour G - Very White

Clarity VS2 - V.Slight Marks

Diamond ID: 9971335623

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diamond
Typical High St. Price £1,238
Today £619 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 87 %

Colour G - Very White

Clarity SI1 - Slight Marks

Diamond ID: 9973594974

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diamond
Typical High St. Price £1,238
Today £619 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 85 %

Colour I - Low White

Clarity VS2 - V.Slight Marks

Diamond ID: 9976713105

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diamond
Typical High St. Price £1,238
Today £619 inc. VAT

ROUND 3.03 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9974785220

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diamond
Typical High St. Price £1,246
Today £623 inc. VAT

ROUND 3.09 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9972828991

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diamond
Typical High St. Price £1,246
Today £623 inc. VAT

ROUND 3.10 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9977186468

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diamond
Typical High St. Price £1,246
Today £623 inc. VAT

ROUND 3.09 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9974108032

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diamond
Typical High St. Price £1,246
Today £623 inc. VAT

ROUND 3.09 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9976755274

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diamond
Typical High St. Price £1,246
Today £623 inc. VAT

ROUND 3.09 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9977997804

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diamond
Typical High St. Price £1,246
Today £623 inc. VAT

ROUND 3.02 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9978613489

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diamond
Typical High St. Price £1,246
Today £623 inc. VAT

ROUND 3.10 cts.

Sparkle Factor 88 %

Colour G - Very White

Clarity VS2 - V.Slight Marks

Diamond ID: 9974521544

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 90 %

Colour H - White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9973762175

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 87 %

Colour H - White

Clarity VS2 - V.Slight Marks

Diamond ID: 9979324864

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.06 cts.

Sparkle Factor 90 %

Colour G - Very White

Clarity VS1 - V.Slight Marks

Diamond ID: 9973644708

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.02 cts.

Sparkle Factor 88 %

Colour H - White

Clarity VS1 - V.Slight Marks

Diamond ID: 9972443206

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.02 cts.

Sparkle Factor 88 %

Colour H - White

Clarity VS1 - V.Slight Marks

Diamond ID: 9972539505

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.02 cts.

Sparkle Factor 90 %

Colour H - White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9979713358

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 86 %

Colour G - Very White

Clarity VS2 - V.Slight Marks

Diamond ID: 9972421835

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.24 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9972285497

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 88 %

Colour I - Low White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9977731096

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.26 cts.

Sparkle Factor 84 %

Colour H - White

Clarity SI2 - Slight Marks

Diamond ID: 9977953340

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9972560967

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9979282507

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.05 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9979899060

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9973213313

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diamond
Typical High St. Price £1,260
Today £630 inc. VAT

ROUND 3.04 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9979636155

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diamond
Typical High St. Price £1,267
Today £634 inc. VAT

ROUND 3.06 cts.

Sparkle Factor 88 %

Colour E - Colourless

Clarity SI2 - Slight Marks

Diamond ID: 9974334238

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diamond
Typical High St. Price £1,267
Today £634 inc. VAT

ROUND 3.02 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9977648699

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diamond
Typical High St. Price £1,267
Today £634 inc. VAT

ROUND 3.11 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9970245106

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diamond
Typical High St. Price £1,274
Today £637 inc. VAT

ROUND 3.08 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9979137663

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.10 cts.

Sparkle Factor 88 %

Colour E - Colourless

Clarity SI2 - Slight Marks

Diamond ID: 9972937744

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 87 %

Colour I - Low White

Clarity VS1 - V.Slight Marks

Diamond ID: 9971109916

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.05 cts.

Sparkle Factor 88 %

Colour I - Low White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9977731116

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.07 cts.

Sparkle Factor 90 %

Colour H - White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9975752340

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.06 cts.

Sparkle Factor 88 %

Colour F - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9970825750

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.07 cts.

Sparkle Factor 90 %

Colour G - Very White

Clarity VS1 - V.Slight Marks

Diamond ID: 9973965528

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 87 %

Colour H - White

Clarity VS2 - V.Slight Marks

Diamond ID: 9979889582

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.07 cts.

Sparkle Factor 90 %

Colour G - Very White

Clarity VS1 - V.Slight Marks

Diamond ID: 9970745763

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.03 cts.

Sparkle Factor 92 %

Colour G - Very White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9978873233

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.03 cts.

Sparkle Factor 92 %

Colour G - Very White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9971668112

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.02 cts.

Sparkle Factor 92 %

Colour G - Very White

Clarity VVS2 - V.V.Slight Marks

Diamond ID: 9979137323

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diamond
Typical High St. Price £1,282
Today £641 inc. VAT

ROUND 3.01 cts.

Sparkle Factor 92 %

Colour D - Best a girl can get

Clarity SI1 - Slight Marks

Diamond ID: 9975047748

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diamond
Typical High St. Price £1,289
Today £644 inc. VAT

ROUND 3.00 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9975305258

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diamond
Typical High St. Price £1,289
Today £644 inc. VAT

ROUND 3.09 cts.

Sparkle Factor 90 %

Colour E - Colourless

Clarity SI1 - Slight Marks

Diamond ID: 9972629560

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There are no matches - Please redefine your search
At 3 carat the round brilliant cut makes a clear statement. A round brilliant reads true to its carat weight and suits every style of setting. This shape suits anyone who wants maximum sparkle and timeless, resale-friendly appeal. It works in every metal and looks classic in a four- or six-claw solitaire. Every lab grown stone shown is GIA or IGI certified, so you can compare cut, colour and clarity at a glance. Lab grown diamonds give this size and shape at a fraction of the cost of an equivalent mined stone, with identical sparkle. Stock updates continuously; if you do not see the exact combination you want, our team can source it.

How big does a 3 carat round brilliant diamond look?

A round brilliant reads true to its carat weight and suits every style of setting. Carat measures weight rather than diameter, so cut and shape strongly affect how large the stone appears.

Why choose the round brilliant cut at 3 carat?

With 57 to 58 precisely arranged facets, the round brilliant returns more light than any other cut, which is why it remains the most popular and most versatile diamond shape.

Are 3 carat round brilliant lab grown diamonds certified?

Yes, every 3 carat round brilliant lab grown diamond is graded by GIA or IGI, with a report confirming carat weight, colour, clarity and cut.

How should a 3 carat round brilliant diamond be set?

It works in every metal and looks classic in a four- or six-claw solitaire.

Explore Other 3 Carat Lab Grown Diamond Shapes

Princess Diamonds Oval Diamonds Emerald Diamonds Cushion Diamonds Asscher Diamonds Marquise Diamonds Pear Diamonds Heart Diamonds Radiant Diamonds

Round Brilliant Cut Jewellery

Engagement Rings Earrings

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