Marquise|Lab Grown|IGI

4.26ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754595411

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754595411

Diamond specifications and retailer prices

From £12,418 GBP

$16,639 USD

As of November 1, 2026

Save £18,938 GBP (60%) vs most expensive(unlock to see where)

29 retailers carry this diamond

Most expensive: £31,356 GBP at Cape Diamonds · As of October 29, 2026

View at Cape Diamonds

About this 4.26ct lab-grown marquise diamond

This 4.26ct lab-grown marquise 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 LG754595411 or 754595411. Listed at 29 retailers as of October 29, 2026, with prices from £12,418 to £31,356, a £18,938 spread on the same certified stone. Cape Diamonds lists it at £31,356. 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

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle36.5°

Pavilion angle40.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG754595411

Dimensions16.53 × 8.39 × 5.37 mm

L/W Ratio1.97

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

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG754595411

Side View

Caratlytics Score

How it works →

B+

Very Good

Strong quality and value balance

Unlock full score analysis

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

Price History

Last verified: Nov 1

Current: £31,356 GBP|Low: £12,040 GBP|High: £54,909 GBP|Avg: £23,449 GBP|+1.9%

Cape Diamonds

Retailer 2

Retailer 3

Retailer 4

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Retailer 8

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Retailer 11

Retailer 12

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Retailer 17

November 1, 2026

Retailer 5£12,418 GBP

Retailer 17£12,699 GBP

Retailer 8£13,390 GBP

Retailer 9£13,487 GBP

Retailer 12£14,223 GBP

Retailer 16£14,724 GBP

Retailer 15£16,113 GBP

Retailer 13£16,216 GBP

Retailer 6£21,099 GBP

Retailer 10£23,139 GBP

Retailer 14£25,087 GBP

Retailer 11£25,518 GBP

Retailer 3£26,619 GBP

Cape Diamonds£31,356 GBP

Retailer 2£31,946 GBP

Retailer 7£41,128 GBP

Retailer 4£54,909 GBP

33 data points across 17 retailers

29 retailers£12,418 GBP to £31,356 GBP

Retailer 1

£8,941 GBP

$11,980 USD

Price last confirmed 84 days ago

B+

Retailer 2

£12,418 GBP

$16,639 USD

View

B+

Retailer 3

£12,699 GBP

$17,015 USD

View

Retailer 4

£12,699 GBP

$17,015 USD

View

Price last confirmed 24 days ago

Retailer 5

£12,699 GBP

$17,015 USD

View

Price last confirmed 33 days ago

Retailer 6

£13,004 GBP

$17,424 USD

View

Price last confirmed 34 days ago

B+

Retailer 7

£13,390 GBP

$17,941 USD

View

B+

Retailer 8

£13,487 GBP

$18,071 USD

View

B+

Retailer 9

£13,806 GBP

$18,498 USD

View

Retailer 10

£13,806 GBP

$18,498 USD

View

Price last confirmed 22 days ago

Retailer 11

£13,806 GBP

$18,498 USD

View

Price last confirmed 32 days ago

B+

Retailer 12

£14,223 GBP

$19,057 USD

View

Final sale: no returns

Retailer 13

£14,527 GBP

$19,465 USD

View

Price last confirmed 34 days ago

B+

Retailer 14

£14,724 GBP

$19,728 USD

View

Retailer 15

£14,731 GBP

$19,738 USD

View

Price last confirmed 29 days ago

Retailer 16

£14,731 GBP

$19,738 USD

View

Price last confirmed 22 days ago

B+

Retailer 17

£16,113 GBP

$21,590 USD

View

B+

Retailer 18

£16,216 GBP

View

Retailer 19

£21,099 GBP

View

Retailer 20

£23,139 GBP

View

Retailer 21

£25,087 GBP

€32,013 EUR

View

Retailer 22

£25,518 GBP

A$52,602 AUD

View

Retailer 23

£26,619 GBP

$35,666 USD

View

Most Expensive

Cape Diamonds

cert_754595411 · Oct 29

£31,356 GBP

ZAR 678,742 ZAR

View

23 more retailers have this diamond

Prices start from £12,418 GBPSave up to £18,938 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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