Round|Lab Grown|IGI

4.26ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG760565956

Shape and cutting style on the report: Round brilliant

Certificate IGI LG760565956

Diamond specifications and retailer prices

From £1,599 GBP

$2,142 USD

As of October 29, 2026

Save £13,985 GBP (90%) vs most expensive(unlock to see where)

23 retailers carry this diamond

Most expensive: £15,583 GBP at Brilliant Earth · As of October 30, 2026

View at Brilliant Earth

About this 4.26ct lab-grown round diamond

This 4.26ct 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 IGI LG760565956 or 760565956. Listed at 23 retailers as of October 29, 2026, with prices from £1,599 to £15,583, a £13,985 spread on the same certified stone. Brilliant Earth lists it at £15,583. 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

4.26

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle34.4°

Pavilion angle41°

OriginLab Grown

Grading LabIGI

CertificateIGI LG760565956

Dimensions10.36 × 10.39 × 6.44 mm

L/W Ratio1.00

Girdle conditionFaceted

Culet sizePointed

Cert comments

As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG760565956

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

Unlock full score analysis

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

Price History

Last verified: Oct 29

Current: £15,583 GBP|Low: £1,599 GBP|High: £15,583 GBP|Avg: £4,184 GBP

Brilliant Earth

Retailer 2

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October 30, 2026

Retailer 7£1,599 GBP

Retailer 15£1,868 GBP

Retailer 17£1,870 GBP

Retailer 12£2,186 GBP

Retailer 4£2,326 GBP

Retailer 2£2,505 GBP

Retailer 20£2,719 GBP

Retailer 16£2,765 GBP

Retailer 3£2,897 GBP

Retailer 13£3,891 GBP

Retailer 18£3,922 GBP

Retailer 10£4,201 GBP

Retailer 9£4,291 GBP

Retailer 19£4,575 GBP

Retailer 6£4,682 GBP

Retailer 14£4,986 GBP

Retailer 11£6,391 GBP

Retailer 8£8,517 GBP

Retailer 5£9,822 GBP

Brilliant Earth£15,583 GBP

34 data points across 20 retailers

23 retailers£1,599 GBP to £15,583 GBP

Cheapest Retailer

£1,599 GBP

$2,142 USD

Final sale: no returns

Retailer 2

£1,681 GBP

$2,253 USD

View

Retailer 3

£1,743 GBP

$2,336 USD

View

Price last confirmed 37 days ago

Retailer 4

£1,870 GBP

$2,505 USD

View

Retailer 5

£1,897 GBP

$2,542 USD

View

Price last confirmed 37 days ago

Retailer 6

£1,995 GBP

$2,673 USD

View

Price last confirmed 33 days ago

Retailer 7

£2,326 GBP

$3,117 USD

View

Retailer 8

£2,505 GBP

View

Retailer 9

£2,719 GBP

$3,643 USD

View

Retailer 10

£2,765 GBP

€3,528 EUR

View

Retailer 11

£2,780 GBP

$3,725 USD

View

Price last confirmed 33 days ago

Retailer 12

£2,897 GBP

$3,881 USD

View

Retailer 13

£3,891 GBP

ZAR 84,214 ZAR

View

Retailer 14

£3,922 GBP

A$8,085 AUD

View

Price last confirmed 8 days ago

Retailer 15

£4,201 GBP

$5,629 USD

View

Retailer 16

£4,291 GBP

$5,750 USD

View

Retailer 17

£4,575 GBP

$6,130 USD

View

Price last confirmed 9 days ago

Retailer 18

£4,682 GBP

$6,274 USD

View

B+

Retailer 19

£4,986 GBP

View

B+

Retailer 20

£6,391 GBP

$8,564 USD

View

B+

Retailer 21

£8,517 GBP

$11,412 USD

View

B+

Retailer 22

£9,822 GBP

$13,160 USD

View

Most Expensive

Brilliant Earth

21804957A · Oct 30

£15,583 GBP

$20,880 USD

View

22 more retailers have this diamond

Prices start from £1,599 GBPSave up to £13,985 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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