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Marquise|Lab Grown|IGI

4.03ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG768611302

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG768611302

Diamond specifications and retailer prices

From £4,121 GBP
As of October 30, 2026
Save £13,237 GBP (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £17,358 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 4.03ct lab-grown marquise diamond

This 4.03ct lab-grown marquise sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG768611302 or 768611302. Listed at 20 retailers as of October 30, 2026, with prices from £4,121 to £17,358, a £13,237 spread on the same certified stone. Taylor and Hart lists it at £17,358. 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

4.03
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768611302
Dimensions16.29 × 8.42 × 5.20 mm
L/W Ratio1.93
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.29 mm8.42 mm4.03 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768611302
Side View
Table 58.0%Crown 35.6°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.8%

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 30
Current: £4,121 GBP|Low: £4,082 GBP|High: £13,722 GBP|Avg: £6,902 GBP|-0.6%
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
October 30, 2026
Retailer 1£4,121 GBP
Retailer 17£4,253 GBP
Retailer 7£4,457 GBP
Retailer 9£4,499 GBP
Retailer 6£4,762 GBP
Retailer 5£4,933 GBP
Retailer 8£4,933 GBP
Retailer 18£4,933 GBP
Retailer 15£5,856 GBP
Retailer 16£5,968 GBP
Retailer 12£6,319 GBP
Retailer 10£7,018 GBP
Retailer 2£7,616 GBP
Retailer 13£10,092 GBP
Retailer 11£10,499 GBP
Retailer 14£10,902 GBP
Retailer 4£12,529 GBP
Retailer 3£13,722 GBP

41 data points across 18 retailers

20 retailers£4,121 GBP to £17,358 GBP

A
Cheapest Retailer
-
£4,121 GBP
A
Retailer 2
-
£4,253 GBP
$5,698 USD
View
A
Retailer 3
-
£4,457 GBP
$5,972 USD
View
A
Retailer 4
-
£4,499 GBP
$6,028 USD
View
A
Retailer 5
-
£4,762 GBP
$6,381 USD
View
Final sale: no returns
A
Retailer 6
-
£4,933 GBP
$6,610 USD
View
Retailer 7
-
£4,933 GBP
$6,610 USD
View
Price last confirmed 15 days ago
A
Retailer 8
-
£4,933 GBP
$6,610 USD
View
A
Retailer 9
-
£4,956 GBP
$6,640 USD
View
A
Retailer 10
-
£5,856 GBP
$7,846 USD
View
A
Retailer 11
-
£5,968 GBP
$7,997 USD
View
A
Retailer 12
-
£6,319 GBP
View
A
Retailer 13
-
£7,018 GBP
View
A
Retailer 14
-
£7,616 GBP
$10,204 USD
View
B+
Retailer 15
-
£10,092 GBP
View
B+
Retailer 16
-
£10,499 GBP
ZAR 227,270 ZAR
View
Retailer 17
-
£10,902 GBP
A$22,474 AUD
View
Price last confirmed 9 days ago
B+
Retailer 18
-
£12,529 GBP
$16,788 USD
View
B+
Retailer 19
-
£13,722 GBP
$18,386 USD
View
Most Expensive
B
Taylor and Hart
03QG3NW · Oct 30
£17,358 GBP
$23,257 USD
View
19 more retailers have this diamond
Prices start from £4,121 GBPSave up to £13,237 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
4.03ct Marquise
£4,121 GBP