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Marquise|Lab Grown|IGI

1.23ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG816614181

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG816614181

Diamond specifications and retailer prices

From £139 GBP
As of November 6, 2026
Save £664 GBP (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £803 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 LG816614181 or 816614181. Listed at 17 retailers as of November 5, 2026, with prices from £139 to £803, a £664 spread on the same certified stone. MOH London lists it at £803. 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 angle32.6°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816614181
Dimensions11.97 × 5.40 × 3.39 mm
L/W Ratio2.22
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.97 mm5.40 mm1.23 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816614181
Side View
Table 60.0%Crown 32.6°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.8%

Caratlytics Score

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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 6
Current: £803 GBP|Low: £139 GBP|High: £919 GBP|Avg: £449 GBP|-4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 12£139 GBP
Retailer 13£161 GBP
Retailer 14£205 GBP
Retailer 7£233 GBP
Retailer 2£291 GBP
Retailer 10£293 GBP
Retailer 15£309 GBP
Retailer 4£334 GBP
Retailer 17£411 GBP
Retailer 16£420 GBP
Retailer 6£489 GBP
Retailer 9£513 GBP
Retailer 11£554 GBP
Retailer 8£564 GBP
Retailer 5£593 GBP
Retailer 3£613 GBP
MOH London£803 GBP

35 data points across 17 retailers

17 retailers£139 GBP to £803 GBP

A
Cheapest Retailer
-
£139 GBP
A
Retailer 2
-
£161 GBP
View
A
Retailer 3
-
£205 GBP
View
B+
Retailer 4
-
£233 GBP
View
A
Retailer 5
-
£291 GBP
View
A
Retailer 6
-
£293 GBP
View
A
Retailer 7
-
£309 GBP
View
A
Retailer 8
-
£334 GBP
View
A
Retailer 9
-
£411 GBP
View
A
Retailer 10
-
£420 GBP
View
B+
Retailer 11
-
£489 GBP
View
Retailer 12
-
£513 GBP
View
Price last confirmed 11 days ago
B+
Retailer 13
-
£554 GBP
View
B+
Retailer 14
-
£564 GBP
View
B+
Retailer 15
-
£593 GBP
View
B+
Retailer 16
-
£613 GBP
View
Most Expensive
B
MOH London
LG816614181 · Nov 5
£803 GBP
View
16 more retailers have this diamond
Prices start from £139 GBPSave up to £664 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
£139 GBP