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Marquise|Lab Grown|IGI

1.09ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG835609047

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG835609047

Diamond specifications and retailer prices

From £117 GBP
As of November 4, 2026
Save £491 GBP (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £609 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 LG835609047 or 835609047. Listed at 12 retailers as of November 4, 2026, with prices from £117 to £609, a £491 spread on the same certified stone. MOH London lists it at £609. 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
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG835609047
Dimensions10.51 × 5.55 × 3.35 mm
L/W Ratio1.89
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.51 mm5.55 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG835609047
Side View
Table 60.0%Crown 32.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
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 4
Current: £609 GBP|Low: £117 GBP|High: £625 GBP|Avg: £289 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 12£117 GBP
Retailer 9£152 GBP
Retailer 2£168 GBP
Retailer 5£221 GBP
Retailer 8£224 GBP
Retailer 11£242 GBP
Retailer 6£247 GBP
Retailer 3£250 GBP
Retailer 7£333 GBP
Retailer 4£360 GBP
Retailer 10£397 GBP
MOH London£609 GBP

38 data points across 12 retailers

12 retailers£117 GBP to £609 GBP

A
Cheapest Retailer
-
£117 GBP
Final sale: no returns
A
Retailer 2
-
£152 GBP
View
A
Retailer 3
-
£168 GBP
View
A
Retailer 4
-
£221 GBP
View
Retailer 5
-
£224 GBP
View
Price last confirmed 10 days ago
B+
Retailer 6
-
£242 GBP
View
A
Retailer 7
-
£247 GBP
View
Retailer 8
-
£250 GBP
View
Price last confirmed 12 days ago
B+
Retailer 9
-
£333 GBP
View
B+
Retailer 10
-
£360 GBP
View
Retailer 11
-
£397 GBP
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
LG835609047 · Nov 4
£609 GBP
View
11 more retailers have this diamond
Prices start from £117 GBPSave up to £491 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
£117 GBP