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Marquise|Lab Grown|IGI

1.23ct F VS1 Marquise Lab Grown Diamond

EX • F/VS1 • IGI LG758554277

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG758554277

Diamond specifications and retailer prices

From £328 GBP
As of November 6, 2026
Save £555 GBP (63%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £883 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.23ct lab-grown marquise diamond

This 1.23ct lab-grown marquise sits in the classic one-carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG758554277 or 758554277. Listed at 7 retailers as of November 5, 2026, with prices from £328 to £883, a £555 spread on the same certified stone. MOH London lists it at £883. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758554277
Dimensions10.82 × 5.72 × 3.49 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.82 mm5.72 mm1.23 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG758554277
Side View
Table 61.0%Crown 36.4°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 61.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £883 GBP|Low: £316 GBP|High: £895 GBP|Avg: £473 GBP|+13.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 6£328 GBP
Retailer 4£339 GBP
Retailer 2£344 GBP
Retailer 5£372 GBP
Retailer 3£504 GBP
Retailer 7£648 GBP
MOH London£883 GBP

41 data points across 7 retailers

7 retailers£328 GBP to £883 GBP

A
Cheapest Retailer
-
£328 GBP
A
Retailer 2
-
£339 GBP
View
A
Retailer 3
-
£344 GBP
View
A
Retailer 4
-
£372 GBP
View
B+
Retailer 5
-
£504 GBP
View
B
Retailer 6
-
£648 GBP
View
Most Expensive
B
MOH London
LG758554277 · Nov 5
£883 GBP
View
6 more retailers have this diamond
Prices start from £328 GBPSave up to £555 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
1.23ct Marquise
£328 GBP