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Marquise|Lab Grown|IGI

4.26ct E FL Marquise Lab Grown Diamond

EX • E/FL • IGI LG793637246

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG793637246

Diamond specifications and retailer prices

From £6,396 GBP
$8,570 USD
As of October 31, 2026
Save £20,450 GBP (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £26,846 GBP at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.26ct lab-grown marquise diamond

This 4.26ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG793637246 or 793637246. Listed at 20 retailers as of October 31, 2026, with prices from £6,396 to £26,846, a £20,450 spread on the same certified stone. Taylor and Hart lists it at £26,846. 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
E
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG793637246
Dimensions16.51 × 8.48 × 5.30 mm
L/W Ratio1.95
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.51 mm8.48 mm4.26 ctE / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG793637246
Side View
Table 60.0%Crown 34.2°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
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 31
Current: £10,316 GBP|Low: £6,396 GBP|High: £40,227 GBP|Avg: £14,230 GBP|+13.0%
Retailer 1
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Retailer 23
Taylor and Hart
November 2, 2026
Retailer 8£6,396 GBP
Retailer 3£6,517 GBP
Retailer 21£6,914 GBP
Retailer 20£7,813 GBP
Retailer 19£7,814 GBP
Retailer 2£8,187 GBP
Retailer 18£8,328 GBP
Retailer 17£8,633 GBP
Retailer 1£10,316 GBP
Retailer 23£11,891 GBP
Retailer 13£11,940 GBP
Retailer 16£11,977 GBP
Retailer 9£12,432 GBP
Retailer 4£12,635 GBP
Retailer 12£13,934 GBP
Retailer 10£14,053 GBP
Retailer 5£17,172 GBP
Retailer 22£18,463 GBP
Retailer 15£19,725 GBP
Retailer 7£21,626 GBP
Retailer 11£21,894 GBP
Taylor and Hart£26,846 GBP
Retailer 14£38,840 GBP
Retailer 6£40,227 GBP

21 data points across 24 retailers

20 retailers£6,396 GBP to £26,846 GBP

A
Cheapest Retailer
-
£6,396 GBP
$8,570 USD
A
Retailer 2
-
£6,517 GBP
$8,732 USD
View
A
Retailer 3
-
£6,914 GBP
CA$12,866 CAD
View
A
Retailer 4
-
£7,369 GBP
$9,873 USD
View
A
Retailer 5
-
£7,813 GBP
$10,469 USD
View
A
Retailer 6
-
£7,814 GBP
$10,470 USD
View
A
Retailer 7
-
£8,328 GBP
$11,159 USD
View
Final sale: no returns
A
Retailer 8
-
£8,633 GBP
$11,567 USD
View
B+
Retailer 9
-
£10,316 GBP
View
B+
Retailer 10
-
£11,891 GBP
$15,932 USD
View
B+
Retailer 11
-
£12,432 GBP
View
B+
Retailer 12
-
£12,635 GBP
$16,930 USD
View
B+
Retailer 13
-
£13,934 GBP
View
B+
Retailer 14
-
£14,053 GBP
$18,829 USD
View
B
Retailer 15
-
£17,172 GBP
$23,009 USD
View
B
Retailer 16
-
£18,463 GBP
ZAR 399,648 ZAR
View
B
Retailer 17
-
£21,626 GBP
$28,976 USD
View
B
Retailer 18
-
£21,894 GBP
$29,336 USD
View
Most Expensive
B
Taylor and Hart
VU6VJ2G · Oct 31
£26,846 GBP
$35,971 USD
View
18 more retailers have this diamond
Prices start from £6,396 GBPSave up to £20,450 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.

A
4.26ct Marquise
£6,396 GBP