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Oval|Lab Grown|IGI

1.21ct F VS1 Oval Lab Grown Diamond

EX • F/VS1 • IGI LG791645959

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG791645959

Diamond specifications and retailer prices

From £158 GBP
As of November 3, 2026
Save £622 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £780 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown oval diamond

This 1.21ct lab-grown oval 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 LG791645959 or 791645959. Listed at 16 retailers as of November 3, 2026, with prices from £158 to £780, a £622 spread on the same certified stone. MOH London lists it at £780. 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 angle38.1°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG791645959
Dimensions8.79 × 5.76 × 3.57 mm
L/W Ratio1.53
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.79 mm5.76 mm1.21 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG791645959
Side View
Table 62.0%Crown 38.1°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.0%

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 3
Current: £780 GBP|Low: £158 GBP|High: £887 GBP|Avg: £464 GBP|-0.6%
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
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Retailer 16
November 5, 2026
Retailer 13£158 GBP
Retailer 16£183 GBP
Retailer 14£196 GBP
Retailer 8£219 GBP
Retailer 9£233 GBP
Retailer 6£330 GBP
Retailer 5£336 GBP
Retailer 12£336 GBP
Retailer 2£357 GBP
Retailer 4£430 GBP
Retailer 10£452 GBP
Retailer 11£477 GBP
Retailer 15£627 GBP
Retailer 3£630 GBP
Retailer 7£667 GBP
MOH London£780 GBP

38 data points across 16 retailers

16 retailers£158 GBP to £780 GBP

A
Cheapest Retailer
-
£158 GBP
A
Retailer 2
-
£183 GBP
View
A
Retailer 3
-
£196 GBP
View
Retailer 4
-
£219 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£233 GBP
View
A
Retailer 6
-
£330 GBP
View
A
Retailer 7
-
£336 GBP
View
A
Retailer 8
-
£336 GBP
View
A
Retailer 9
-
£357 GBP
View
B+
Retailer 10
-
£430 GBP
View
B+
Retailer 11
-
£452 GBP
View
B+
Retailer 12
-
£477 GBP
View
B+
Retailer 13
-
£627 GBP
View
B+
Retailer 14
-
£630 GBP
View
B
Retailer 15
-
£667 GBP
View
Most Expensive
B
MOH London
LG791645959 · Nov 5
£780 GBP
View
15 more retailers have this diamond
Prices start from £158 GBPSave up to £622 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 Oval
£158 GBP