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Marquise|Lab Grown|IGI

4.01ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG604382783

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG604382783

Diamond specifications and retailer prices

From £1,249 GBP
$1,676 USD
As of November 2, 2026
Save £3,170 GBP (72%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £5,509 GBP at Michael Trio · As of November 2, 2026
View at Michael Trio

About this 4.01ct lab-grown marquise diamond

This 4.01ct lab-grown marquise sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG604382783 or 604382783. Listed at 6 retailers as of November 2, 2026, with a 254% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

4.01
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG604382783
Dimensions16.26 × 8.24 × 5.18 mm
L/W Ratio1.97
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
16.26 mm8.24 mm4.01 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG604382783
Side View
Table 61.0%Crown 34.8°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.9%

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 2
Current: £5,509 GBP|Low: £1,249 GBP|High: £5,951 GBP|Avg: £3,282 GBP|+85.1%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 4£1,249 GBP
Retailer 5£1,679 GBP
Retailer 6£1,908 GBP
Retailer 2£2,422 GBP
Retailer 7£2,891 GBP
Retailer 9£4,002 GBP
Retailer 10£4,002 GBP
Retailer 3£4,419 GBP
Retailer 8£4,553 GBP
Michael Trio£5,509 GBP

16 data points across 10 retailers

6 retailers£1,249 GBP to £4,419 GBP

B+
Cheapest Retailer
-
£1,249 GBP
$1,676 USD
B
Retailer 2
-
£1,679 GBP
$2,253 USD
View
B
Retailer 3
-
£1,908 GBP
HK$20,000 HKD
View
B
Retailer 4
-
£2,422 GBP
€3,095 EUR
View
B
Retailer 5
-
£4,419 GBP
$5,930 USD
View
Most Expensive
Michael Trio
1573525668 · Nov 2
£5,509 GBP
SGD 9,990 SGD
View
Price under review
5 more retailers have this diamond
Prices start from £1,249 GBPSave up to £3,170 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.

B+
4.01ct Marquise
£1,249 GBP