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Marquise|Lab Grown|IGI

0.40ct I SI1 Marquise Lab Grown Diamond

ID • I/SI1 • IGI LG538287035

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG538287035

Diamond specifications and retailer prices

From £78 GBP
$104 USD
As of November 2, 2026
Save £727 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £805 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.4ct lab-grown marquise diamond

This 0.4ct lab-grown marquise sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG538287035 or 538287035. Listed at 10 retailers as of October 29, 2026, with prices from £78 to £805, a £727 spread on the same certified stone. MOH London lists it at £805. 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

0.40
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.9°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG538287035
Dimensions7.57 × 3.87 × 2.19 mm
L/W Ratio1.96
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
7.57 mm3.87 mm0.40 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG538287035
Side View
Table 59.5%Crown 35.9°Girdle: MED-THKPavilion 35°Culet: NoneDepth 56.6%

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 2
Current: £805 GBP|Low: £74 GBP|High: £809 GBP|Avg: £246 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 4£78 GBP
Retailer 8£90 GBP
Retailer 5£102 GBP
Retailer 9£102 GBP
Retailer 2£157 GBP
Retailer 11£172 GBP
Retailer 7£193 GBP
Retailer 3£228 GBP
Retailer 10£265 GBP
Retailer 6£308 GBP
MOH London£805 GBP

16 data points across 11 retailers

10 retailers£78 GBP to £805 GBP

A
Cheapest Retailer
-
£78 GBP
$104 USD
A
Retailer 2
-
£90 GBP
$120 USD
View
A
Retailer 3
-
£102 GBP
$137 USD
View
Retailer 4
-
£102 GBP
$137 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£157 GBP
$210 USD
View
B+
Retailer 6
-
£172 GBP
HK$1,800 HKD
View
B+
Retailer 7
-
£193 GBP
$259 USD
View
B
Retailer 8
-
£265 GBP
$355 USD
View
B
Retailer 9
-
£308 GBP
$413 USD
View
Most Expensive
B
MOH London
LG538287035 · Oct 29
£805 GBP
View
9 more retailers have this diamond
Prices start from £78 GBPSave up to £727 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
0.40ct Marquise
£78 GBP