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Marquise|Lab Grown|IGI

1.21ct F VS1 Marquise Lab Grown Diamond

EX • F/VS1 • IGI LG794610778

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG794610778

Diamond specifications and retailer prices

From £152 GBP
As of November 6, 2026
Save £729 GBP (83%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £881 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.21ct lab-grown marquise diamond

This 1.21ct 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 LG794610778 or 794610778. Listed at 21 retailers as of November 2, 2026, with prices from £152 to £881, a £729 spread on the same certified stone. MOH London lists it at £881. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.8°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794610778
Dimensions10.59 × 5.82 × 3.53 mm
L/W Ratio1.82
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.59 mm5.82 mm1.21 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794610778
Side View
Table 59.0%Crown 31.8°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.7%

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: £881 GBP|Low: £146 GBP|High: £896 GBP|Avg: £459 GBP|-1.7%
MOH London
Retailer 2
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Retailer 20
November 6, 2026
Retailer 5£152 GBP
Retailer 4£170 GBP
Retailer 18£176 GBP
Retailer 9£188 GBP
Retailer 2£319 GBP
Retailer 10£326 GBP
Retailer 12£330 GBP
Retailer 13£341 GBP
Retailer 20£392 GBP
Retailer 3£427 GBP
Retailer 17£459 GBP
Retailer 11£493 GBP
Retailer 16£495 GBP
Retailer 14£518 GBP
Retailer 19£606 GBP
Retailer 6£612 GBP
Retailer 8£646 GBP
Retailer 7£647 GBP
Retailer 15£717 GBP
MOH London£881 GBP

34 data points across 20 retailers

21 retailers£152 GBP to £881 GBP

A
Cheapest Retailer
-
£152 GBP
A
Retailer 2
-
£170 GBP
View
Final sale: no returns
A
Retailer 3
-
£176 GBP
View
A
Retailer 4
-
£188 GBP
View
Retailer 5
-
£189 GBP
View
Price last confirmed 13 days ago
A
Retailer 6
-
£319 GBP
View
A
Retailer 7
-
£326 GBP
View
A
Retailer 8
-
£330 GBP
View
A
Retailer 9
-
£341 GBP
View
B+
Retailer 10
-
£392 GBP
View
B+
Retailer 11
-
£427 GBP
View
B+
Retailer 12
-
£459 GBP
View
B+
Retailer 13
-
£493 GBP
View
B+
Retailer 14
-
£495 GBP
View
B+
Retailer 15
-
£518 GBP
View
B+
Retailer 16
-
£606 GBP
View
B+
Retailer 17
-
£612 GBP
View
B+
Retailer 18
-
£646 GBP
View
B
Retailer 19
-
£647 GBP
View
B
Retailer 20
-
£717 GBP
View
Most Expensive
B
MOH London
LG794610778 · Nov 2
£881 GBP
View
20 more retailers have this diamond
Prices start from £152 GBPSave up to £729 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
1.21ct Marquise
£152 GBP