Round|Lab Grown|GCAL

4.20ct D IF Round Lab Grown Diamond

EX • D/IF • GCAL 361266140

Shape and cutting style on the report: Round brilliant

Certificate GCAL 361266140

Diamond specifications and retailer prices

From £3,132 GBP

$4,171 USD

As of October 30, 2026

Save £21,619 GBP (87%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: £24,751 GBP at Kay Jewelers · As of October 30, 2026

View at Kay Jewelers

About this 4.2ct lab-grown round diamond

This 4.2ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GCAL 361266140. Listed at 17 retailers as of October 30, 2026, with prices from £3,132 to £24,751, a £21,619 spread on the same certified stone. Kay Jewelers lists it at £24,751. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.20

Carat

Colour

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.5°

Pavilion angle40.6°

OriginLab Grown

Grading LabGCAL

CertificateGCAL 361266140

Dimensions10.36 × 10.32 × 6.40 mm

L/W Ratio1.00

Culet sizeNone

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateGCAL 361266140

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30

Current: £24,751 GBP|Low: £3,132 GBP|High: £24,751 GBP|Avg: £8,011 GBP|+78.5%

Kay Jewelers

Retailer 2

Retailer 3

Retailer 4

Retailer 5

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Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

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Retailer 16

October 30, 2026

Retailer 16£3,132 GBP

Retailer 13£3,411 GBP

Retailer 14£3,574 GBP

Retailer 7£3,819 GBP

Retailer 6£3,957 GBP

Retailer 15£3,957 GBP

Retailer 11£5,053 GBP

Retailer 8£5,184 GBP

Retailer 2£5,290 GBP

Retailer 4£5,690 GBP

Retailer 9£8,934 GBP

Retailer 12£10,029 GBP

Retailer 5£15,681 GBP

Retailer 3£23,467 GBP

Kay Jewelers£24,751 GBP

Retailer 10£24,751 GBP

43 data points across 16 retailers

17 retailers£3,132 GBP to £24,751 GBP

Cheapest Retailer

£3,132 GBP

$4,171 USD

Retailer 2

£3,411 GBP

$4,542 USD

View

Retailer 3

£3,574 GBP

$4,760 USD

View

Retailer 4

£3,819 GBP

$5,086 USD

View

Final sale: no returns

Retailer 5

£3,957 GBP

$5,269 USD

View

Retailer 6

£3,957 GBP

$5,269 USD

View

Price last confirmed 13 days ago

B+

Retailer 7

£5,053 GBP

$6,729 USD

View

B+

Retailer 8

£5,184 GBP

$6,904 USD

View

B+

Retailer 9

£5,290 GBP

View

B+

Retailer 10

£7,374 GBP

$9,820 USD

View

B+

Retailer 11

£8,934 GBP

View

B+

Retailer 12

£10,029 GBP

$13,356 USD

View

Retailer 13

£12,547 GBP

$16,709 USD

View

Retailer 14

£15,681 GBP

$20,882 USD

View

Retailer 15

£23,467 GBP

$31,250 USD

View

Retailer 16

£24,751 GBP

$32,960 USD

View

Most Expensive

Kay Jewelers

259115251 · Oct 30

£24,751 GBP

$32,960 USD

View

16 more retailers have this diamond

Prices start from £3,132 GBPSave up to £21,619 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

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4.20ct Round

£3,132 GBP