Round|Lab Grown|IGI

4.26ct D IF Round Lab Grown Diamond

ID • D/IF • IGI LG754507816

Shape and cutting style on the report: Round brilliant

Certificate IGI LG754507816

Diamond specifications and retailer prices

From £1,938 GBP

$2,597 USD

As of October 29, 2026

Save £9,555 GBP (83%) vs most expensive(unlock to see where)

29 retailers carry this diamond

Most expensive: £11,493 GBP at Do Amore Diamonds · As of October 29, 2026

View at Do Amore Diamonds

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 LG754507816 or 754507816. Listed at 29 retailers as of October 29, 2026, with prices from £1,938 to £11,493, a £9,555 spread on the same certified stone. Do Amore Diamonds lists it at £11,493. 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 angle34.1°

Pavilion angle40.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG754507816

Dimensions10.42 × 10.48 × 6.36 mm

L/W Ratio1.01

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 LG754507816

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: £11,493 GBP|Low: £1,663 GBP|High: £17,845 GBP|Avg: £5,128 GBP

Do Amore Diamonds

Retailer 2

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Retailer 22

October 30, 2026

Retailer 21£1,663 GBP

Retailer 9£2,054 GBP

Retailer 4£2,162 GBP

Retailer 10£2,656 GBP

Retailer 20£2,819 GBP

Retailer 3£2,821 GBP

Retailer 13£2,876 GBP

Retailer 22£3,038 GBP

Retailer 8£3,217 GBP

Retailer 15£3,291 GBP

Retailer 18£3,413 GBP

Retailer 16£4,553 GBP

Retailer 19£4,590 GBP

Retailer 7£5,174 GBP

Retailer 5£5,412 GBP

Retailer 11£5,596 GBP

Retailer 17£5,758 GBP

Retailer 14£7,465 GBP

Retailer 12£7,696 GBP

Retailer 6£8,383 GBP

Retailer 2£9,993 GBP

Do Amore Diamonds£11,493 GBP

36 data points across 22 retailers

29 retailers£1,938 GBP to £11,493 GBP

Retailer 1

£1,663 GBP

Price last confirmed 13 days ago

Retailer 2

£1,817 GBP

$2,435 USD

View

Price last confirmed 24 days ago

Retailer 3

£1,817 GBP

$2,435 USD

View

Price last confirmed 17 days ago

Retailer 4

£1,870 GBP

$2,505 USD

View

Price last confirmed 32 days ago

Retailer 5

£1,938 GBP

$2,597 USD

View

Retailer 6

£1,938 GBP

$2,597 USD

View

Price last confirmed 28 days ago

Retailer 7

£2,054 GBP

$2,752 USD

View

Retailer 8

£2,139 GBP

$2,866 USD

View

Price last confirmed 31 days ago

Retailer 9

£2,162 GBP

$2,897 USD

View

Final sale: no returns

Retailer 10

£2,257 GBP

$3,024 USD

View

Price last confirmed 37 days ago

Retailer 11

£2,656 GBP

HK$27,800 HKD

View

Retailer 12

£2,819 GBP

$3,777 USD

View

Retailer 13

£2,821 GBP

$3,780 USD

View

Retailer 14

£2,876 GBP

View

Retailer 15

£3,038 GBP

$4,070 USD

View

Retailer 16

£3,217 GBP

$4,310 USD

View

Retailer 17

£3,291 GBP

$4,409 USD

View

Price last confirmed 30 days ago

Retailer 18

£3,413 GBP

€4,355 EUR

View

Retailer 19

£4,553 GBP

ZAR 98,564 ZAR

View

Retailer 20

£4,590 GBP

A$9,462 AUD

View

Price last confirmed 8 days ago

B+

Retailer 21

£5,174 GBP

$6,933 USD

View

B+

Retailer 22

£5,412 GBP

$7,251 USD

View

B+

Retailer 23

£5,596 GBP

$7,498 USD

View

B+

Retailer 24

£5,758 GBP

View

B+

Retailer 25

£7,465 GBP

$10,003 USD

View

B+

Retailer 26

£7,696 GBP

SGD 13,935 SGD

View

Retailer 27

£8,383 GBP

A$17,281 AUD

View

Price last confirmed 22 days ago

B+

Retailer 28

£9,993 GBP

$13,390 USD

View

Most Expensive

Do Amore Diamonds

27-3062BDC9F · Oct 29

£11,493 GBP

$15,400 USD

View

28 more retailers have this diamond

Prices start from £1,938 GBPSave up to £9,555 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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4.26ct Round

£1,938 GBP