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Marquise|Lab Grown|IGI

1.23ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG845651268

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG845651268

Diamond specifications and retailer prices

From £211 GBP
As of November 6, 2026
Save £424 GBP (67%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £635 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

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 LG845651268 or 845651268. Listed at 9 retailers as of November 6, 2026, with prices from £211 to £635, a £424 spread on the same certified stone. Brilliant Earth lists it at £635. 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 angle36.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG845651268
Dimensions10.64 × 5.61 × 3.59 mm
L/W Ratio1.90
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.64 mm5.61 mm1.23 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG845651268
Side View
Table 61.0%Crown 36.2°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 64.0%

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 6
Current: £635 GBP|Low: £211 GBP|High: £635 GBP|Avg: £428 GBP|+1.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£211 GBP
Retailer 2£301 GBP
Retailer 8£312 GBP
Retailer 5£321 GBP
Retailer 4£335 GBP
Retailer 9£442 GBP
Retailer 7£574 GBP
Retailer 6£611 GBP
Brilliant Earth£635 GBP

7 data points across 9 retailers

9 retailers£211 GBP to £635 GBP

A
Cheapest Retailer
-
£211 GBP
A
Retailer 2
-
£301 GBP
View
A
Retailer 3
-
£312 GBP
View
A
Retailer 4
-
£321 GBP
View
A
Retailer 5
-
£335 GBP
View
B+
Retailer 6
-
£442 GBP
View
B+
Retailer 7
-
£574 GBP
View
B+
Retailer 8
-
£611 GBP
View
Most Expensive
B
Brilliant Earth
22394845A · Nov 6
£635 GBP
$850 USD
View
8 more retailers have this diamond
Prices start from £211 GBPSave up to £424 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
£211 GBP