Round|Lab Grown|IGI

4.26ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG738511281

Shape and cutting style on the report: Round brilliant

Certificate IGI LG738511281

Diamond specifications and retailer prices

From £1,905 GBP

$2,552 USD

As of October 29, 2026

Save £8,232 GBP (81%) vs most expensive(unlock to see where)

28 retailers carry this diamond

Most expensive: £10,137 GBP at With Clarity · As of October 31, 2026

View at With Clarity

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 LG738511281 or 738511281. Listed at 28 retailers as of October 29, 2026, with prices from £1,905 to £10,137, a £8,232 spread on the same certified stone. With Clarity lists it at £10,137. 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 angle35.5°

Pavilion angle40.5°

OriginLab Grown

Grading LabIGI

CertificateIGI LG738511281

Dimensions10.38 × 10.33 × 6.39 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 LG738511281

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: £2,706 GBP|Low: £1,905 GBP|High: £18,502 GBP|Avg: £5,099 GBP|+0.3%

Retailer 1

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

Retailer 16

Retailer 17

Retailer 18

Retailer 19

Retailer 20

With Clarity

October 31, 2026

Retailer 15£1,905 GBP

Retailer 13£1,946 GBP

Retailer 7£2,086 GBP

Retailer 5£2,398 GBP

Retailer 1£2,706 GBP

Retailer 20£2,862 GBP

Retailer 2£2,963 GBP

Retailer 19£3,024 GBP

Retailer 17£3,140 GBP

Retailer 9£3,670 GBP

Retailer 14£4,200 GBP

Retailer 18£4,235 GBP

Retailer 6£5,148 GBP

Retailer 4£5,269 GBP

Retailer 16£5,383 GBP

Retailer 10£5,571 GBP

Retailer 8£6,893 GBP

Retailer 11£6,941 GBP

Retailer 3£8,282 GBP

Retailer 12£10,053 GBP

With Clarity£10,137 GBP

38 data points across 21 retailers

28 retailers£1,905 GBP to £10,137 GBP

Retailer 1

£1,701 GBP

$2,279 USD

Price last confirmed 35 days ago

Retailer 2

£1,851 GBP

$2,480 USD

View

Price last confirmed 24 days ago

Retailer 3

£1,851 GBP

$2,480 USD

View

Price last confirmed 17 days ago

Retailer 4

£1,905 GBP

$2,552 USD

View

Final sale: no returns

Retailer 5

£1,946 GBP

$2,607 USD

View

Price last confirmed 33 days ago

Retailer 6

£1,973 GBP

$2,644 USD

View

Retailer 7

£1,973 GBP

$2,644 USD

View

Price last confirmed 28 days ago

Retailer 8

£1,984 GBP

$2,658 USD

View

Price last confirmed 37 days ago

Retailer 9

£2,086 GBP

$2,795 USD

View

Retailer 10

£2,398 GBP

HK$25,100 HKD

View

Retailer 11

£2,706 GBP

View

Retailer 12

£2,712 GBP

$3,634 USD

View

Price last confirmed 33 days ago

Retailer 13

£2,862 GBP

$3,835 USD

View

Retailer 14

£2,963 GBP

$3,970 USD

View

Retailer 15

£3,024 GBP

$4,052 USD

View

Retailer 16

£3,140 GBP

€4,007 EUR

View

Retailer 17

£3,670 GBP

$4,918 USD

View

Retailer 18

£4,200 GBP

ZAR 90,921 ZAR

View

Retailer 19

£4,235 GBP

A$8,729 AUD

View

Price last confirmed 8 days ago

Retailer 20

£5,148 GBP

$6,898 USD

View

Price last confirmed 21 days ago

B+

Retailer 21

£5,269 GBP

$7,060 USD

View

B+

Retailer 22

£5,383 GBP

View

B+

Retailer 23

£5,571 GBP

$7,465 USD

View

B+

Retailer 24

£6,893 GBP

$9,236 USD

View

B+

Retailer 25

£6,941 GBP

SGD 12,568 SGD

View

Retailer 26

£8,282 GBP

A$17,072 AUD

View

Price last confirmed 25 days ago

Retailer 27

£10,053 GBP

$13,470 USD

View

Most Expensive

With Clarity

738511281 · Oct 31

£10,137 GBP

$13,582 USD

View

27 more retailers have this diamond

Prices start from £1,905 GBPSave up to £8,232 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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