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Marquise|Lab Grown|IGI

4.01ct F SI1 Marquise Lab Grown Diamond

EX • F/SI1 • IGI LG850606898

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG850606898

Diamond specifications and retailer prices

From £614 GBP
$824 USD
As of November 1, 2026
Save £1,290 GBP (68%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,904 GBP at Rare Carat · As of November 1, 2026
View at Rare Carat

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 LG850606898 or 850606898. Listed at 6 retailers as of November 1, 2026, with prices from £614 to £1,904, a £1,290 spread on the same certified stone. Rare Carat lists it at £1,904. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850606898
Dimensions16.15 × 8.37 × 5.11 mm
L/W Ratio1.93
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.15 mm8.37 mm4.01 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850606898
Side View
Table 59.0%Crown 31.6°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 61.1%

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: Nov 1
Current: £1,904 GBP|Low: £614 GBP|High: £1,904 GBP|Avg: £1,019 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 3, 2026
Retailer 5£614 GBP
Retailer 3£642 GBP
Retailer 4£699 GBP
Retailer 6£833 GBP
Retailer 2£1,431 GBP
Rare Carat£1,904 GBP

7 data points across 6 retailers

6 retailers£614 GBP to £1,904 GBP

B+
Cheapest Retailer
-
£614 GBP
$824 USD
A
Retailer 2
-
£642 GBP
View
A
Retailer 3
-
£699 GBP
$938 USD
View
A
Retailer 4
-
£833 GBP
$1,118 USD
View
B
Retailer 5
-
£1,431 GBP
View
Most Expensive
B
Rare Carat
SM-55-900_l_850606898 · Nov 1
£1,904 GBP
$2,555 USD
View
5 more retailers have this diamond
Prices start from £614 GBPSave up to £1,290 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
4.01ct Marquise
£614 GBP