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Marquise|Lab Grown|IGI

1.09ct E SI1 Marquise Lab Grown Diamond

EX • E/SI1 • IGI LG792663045

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG792663045

Diamond specifications and retailer prices

From £115 GBP
As of November 4, 2026
Save £486 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £601 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.09ct lab-grown marquise diamond

This 1.09ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG792663045 or 792663045. Listed at 18 retailers as of November 4, 2026, with prices from £115 to £601, a £486 spread on the same certified stone. MOH London lists it at £601. 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

1.09
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792663045
Dimensions10.27 × 5.50 × 3.38 mm
L/W Ratio1.87
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.27 mm5.50 mm1.09 ctE / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG792663045
Side View
Table 63.0%Crown 35.8°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £601 GBP|Low: £103 GBP|High: £713 GBP|Avg: £291 GBP|-4.6%
MOH London
Retailer 2
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Retailer 17
November 6, 2026
Retailer 9£104 GBP
Retailer 7£115 GBP
Retailer 5£120 GBP
Retailer 4£129 GBP
Retailer 2£166 GBP
Retailer 10£218 GBP
Retailer 14£223 GBP
Retailer 3£241 GBP
Retailer 11£244 GBP
Retailer 15£249 GBP
Retailer 6£314 GBP
Retailer 12£328 GBP
Retailer 8£356 GBP
Retailer 16£397 GBP
Retailer 17£415 GBP
Retailer 13£483 GBP
MOH London£601 GBP

42 data points across 17 retailers

18 retailers£115 GBP to £601 GBP

Retailer 1
-
£104 GBP
Price last confirmed 14 days ago
A
Retailer 2
-
£115 GBP
View
Final sale: no returns
Retailer 3
-
£120 GBP
View
Price last confirmed 13 days ago
Retailer 4
-
£129 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£152 GBP
View
A
Retailer 6
-
£166 GBP
View
A
Retailer 7
-
£218 GBP
View
Retailer 8
-
£223 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£241 GBP
View
A
Retailer 10
-
£244 GBP
View
B+
Retailer 11
-
£249 GBP
View
Retailer 12
-
£314 GBP
View
Price last confirmed 11 days ago
B+
Retailer 13
-
£328 GBP
View
B+
Retailer 14
-
£356 GBP
View
Retailer 15
-
£397 GBP
View
Price last confirmed 9 days ago
Retailer 16
-
£415 GBP
View
Price last confirmed 12 days ago
B
Retailer 17
-
£483 GBP
View
Most Expensive
B
MOH London
LG792663045 · Nov 4
£601 GBP
View
17 more retailers have this diamond
Prices start from £115 GBPSave up to £486 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
1.09ct Marquise
£115 GBP