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Marquise|Lab Grown|IGI

1.23ct G VS2 Marquise Lab Grown Diamond

VG • G/VS2 • IGI LG541281623

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG541281623

Diamond specifications and retailer prices

From £283 GBP
As of November 2, 2026
Save £463 GBP (62%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £747 GBP at MOH London · As of November 1, 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 G colour (near-colourless) and VS2 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG541281623 or 541281623. Listed at 4 retailers as of November 1, 2026, with prices from £283 to £747, a £463 spread on the same certified stone. MOH London lists it at £747. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
G
Colour
VS2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.7°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG541281623
Dimensions11.47 × 5.75 × 3.31 mm
L/W Ratio1.99
Girdle conditionFaceted
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
11.47 mm5.75 mm1.23 ctG / VS2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG541281623
Side View
Table 60.5%Crown 31.7°Girdle: MED-STKPavilion 38.9°Culet: NoneDepth 57.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £747 GBP|Low: £266 GBP|High: £756 GBP|Avg: £402 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 2, 2026
Retailer 2£283 GBP
Retailer 3£285 GBP
Retailer 4£339 GBP
Retailer 5£376 GBP
MOH London£747 GBP

42 data points across 5 retailers

4 retailers£283 GBP to £747 GBP

A
Cheapest Retailer
-
£283 GBP
A
Retailer 2
-
£285 GBP
$382 USD
View
B+
Retailer 3
-
£339 GBP
$455 USD
View
Most Expensive
B
MOH London
LG541281623 · Nov 1
£747 GBP
View
3 more retailers have this diamond
Prices start from £283 GBPSave up to £463 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
£283 GBP