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Marquise|Lab Grown|IGI

1.23ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG851664807

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG851664807

Diamond specifications and retailer prices

From £160 GBP
As of November 2, 2026
Save £631 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £791 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 LG851664807 or 851664807. Listed at 13 retailers as of November 2, 2026, with prices from £160 to £791, a £631 spread on the same certified stone. MOH London lists it at £791. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG851664807
Dimensions10.90 × 5.62 × 3.54 mm
L/W Ratio1.94
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.90 mm5.62 mm1.23 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG851664807
Side View
Table 59.0%Crown 35.4°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 63.0%

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 2
Current: £791 GBP|Low: £160 GBP|High: £791 GBP|Avg: £420 GBP
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 5, 2026
Retailer 11£160 GBP
Retailer 4£220 GBP
Retailer 7£237 GBP
Retailer 12£340 GBP
Retailer 10£351 GBP
Retailer 5£484 GBP
Retailer 8£497 GBP
Retailer 2£528 GBP
Retailer 3£638 GBP
Retailer 6£639 GBP
Retailer 9£672 GBP
MOH London£791 GBP

4 data points across 12 retailers

13 retailers£160 GBP to £791 GBP

A
Cheapest Retailer
-
£160 GBP
A
Retailer 2
-
£220 GBP
View
A
Retailer 3
-
£237 GBP
View
A
Retailer 4
-
£340 GBP
View
A
Retailer 5
-
£351 GBP
View
B+
Retailer 6
-
£484 GBP
View
B+
Retailer 7
-
£497 GBP
View
B+
Retailer 8
-
£528 GBP
View
B
Retailer 9
-
£638 GBP
View
B
Retailer 10
-
£639 GBP
View
B
Retailer 11
-
£650 GBP
View
B
Retailer 12
-
£672 GBP
View
Most Expensive
B
MOH London
LG851664807 · Nov 5
£791 GBP
View
12 more retailers have this diamond
Prices start from £160 GBPSave up to £631 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
£160 GBP