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Marquise|Lab Grown|IGI

4.05ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG650475156

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG650475156

Diamond specifications and retailer prices

From £382 GBP
$512 USD
As of November 2, 2026
Save £1,594 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,975 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 4.05ct lab-grown marquise diamond

This 4.05ct 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 LG650475156 or 650475156. Listed at 14 retailers as of November 1, 2026, with prices from £382 to £1,975, a £1,594 spread on the same certified stone. MOH London lists it at £1,975. 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

4.05
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG650475156
Dimensions16.73 × 8.25 × 5.23 mm
L/W Ratio2.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.73 mm8.25 mm4.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG650475156
Side View
Table 59.0%Crown 36.5°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 63.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £1,975 GBP|Low: £382 GBP|High: £3,817 GBP|Avg: £1,204 GBP|-0.6%
MOH London
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
November 2, 2026
Retailer 12£382 GBP
Retailer 2£408 GBP
Retailer 5£428 GBP
Retailer 13£473 GBP
Retailer 16£525 GBP
Retailer 14£578 GBP
Retailer 15£721 GBP
Retailer 10£733 GBP
Retailer 4£735 GBP
Retailer 3£870 GBP
Retailer 7£1,003 GBP
Retailer 11£1,221 GBP
Retailer 17£1,244 GBP
Retailer 6£1,945 GBP
MOH London£1,975 GBP
Retailer 8£2,973 GBP
Retailer 9£3,817 GBP

6 data points across 17 retailers

14 retailers£382 GBP to £1,975 GBP

A
Cheapest Retailer
-
£382 GBP
$512 USD
A
Retailer 2
-
£408 GBP
View
A
Retailer 3
-
£428 GBP
$574 USD
View
A
Retailer 4
-
£473 GBP
$635 USD
View
A
Retailer 5
-
£525 GBP
HK$5,500 HKD
View
A
Retailer 6
-
£578 GBP
$775 USD
View
A
Retailer 7
-
£721 GBP
$967 USD
View
A
Retailer 8
-
£733 GBP
View
B+
Retailer 9
-
£735 GBP
$986 USD
View
B+
Retailer 10
-
£870 GBP
$1,167 USD
View
B+
Retailer 11
-
£1,221 GBP
$1,639 USD
View
B
Retailer 12
-
£1,244 GBP
$1,670 USD
View
B
Retailer 13
-
£1,945 GBP
$2,610 USD
View
Most Expensive
B
MOH London
LG650475156 · Nov 1
£1,975 GBP
View
13 more retailers have this diamond
Prices start from £382 GBPSave up to £1,594 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
4.05ct Marquise
£382 GBP