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Marquise|Lab Grown|IGI

1.03ct F SI1 Marquise Lab Grown Diamond

ID • F/SI1 • IGI LG766647276

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG766647276

Diamond specifications and retailer prices

From £229 GBP
As of November 6, 2026
Save £397 GBP (63%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £625 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.03ct lab-grown marquise diamond

This 1.03ct lab-grown marquise sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG766647276 or 766647276. Listed at 7 retailers as of November 4, 2026, with prices from £229 to £625, a £397 spread on the same certified stone. MOH London lists it at £625. 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

1.03
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766647276
Dimensions10.79 × 5.20 × 3.30 mm
L/W Ratio2.07
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.79 mm5.20 mm1.03 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766647276
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 63.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £625 GBP|Low: £223 GBP|High: £634 GBP|Avg: £326 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£229 GBP
Retailer 7£231 GBP
Retailer 5£249 GBP
Retailer 3£254 GBP
Retailer 6£318 GBP
Retailer 4£366 GBP
MOH London£625 GBP

42 data points across 7 retailers

7 retailers£229 GBP to £625 GBP

A
Cheapest Retailer
-
£229 GBP
A
Retailer 2
-
£231 GBP
View
A
Retailer 3
-
£249 GBP
View
A
Retailer 4
-
£254 GBP
View
B+
Retailer 5
-
£318 GBP
View
B+
Retailer 6
-
£366 GBP
View
Most Expensive
B
MOH London
LG766647276 · Nov 4
£625 GBP
View
6 more retailers have this diamond
Prices start from £229 GBPSave up to £397 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
1.03ct Marquise
£229 GBP