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Round|Lab Grown|IGI

1.20ct F VS1 Round Lab Grown Diamond

ID • F/VS1 • IGI LG844687850

Shape and cutting style on the report: Round brilliant

Certificate IGI LG844687850

Diamond specifications and retailer prices

From £128 GBP
As of November 3, 2026
Save £612 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £740 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round 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 LG844687850 or 844687850. Listed at 22 retailers as of November 3, 2026, with prices from £128 to £740, a £612 spread on the same certified stone. MOH London lists it at £740. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
F
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844687850
Dimensions6.86 × 6.88 × 4.14 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.88 mm1.20 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844687850
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 60.3%

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: £740 GBP|Low: £128 GBP|High: £746 GBP|Avg: £349 GBP|-0.8%
MOH London
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November 5, 2026
Retailer 7£128 GBP
Retailer 21£144 GBP
Retailer 22£148 GBP
Retailer 3£159 GBP
Retailer 10£159 GBP
Retailer 12£180 GBP
Retailer 14£215 GBP
Retailer 13£273 GBP
Retailer 18£273 GBP
Retailer 2£280 GBP
Retailer 6£284 GBP
Retailer 19£339 GBP
Retailer 9£342 GBP
Retailer 16£363 GBP
Retailer 17£387 GBP
Retailer 20£471 GBP
Retailer 8£510 GBP
Retailer 15£524 GBP
Retailer 4£539 GBP
Retailer 11£550 GBP
Retailer 5£622 GBP
MOH London£740 GBP

24 data points across 22 retailers

22 retailers£128 GBP to £740 GBP

A
Cheapest Retailer
-
£128 GBP
A
Retailer 2
-
£144 GBP
View
Final sale: no returns
A
Retailer 3
-
£148 GBP
View
Retailer 4
-
£159 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£159 GBP
View
A
Retailer 6
-
£180 GBP
View
B+
Retailer 7
-
£215 GBP
View
A
Retailer 8
-
£273 GBP
View
A
Retailer 9
-
£273 GBP
View
A
Retailer 10
-
£280 GBP
View
A
Retailer 11
-
£284 GBP
View
B+
Retailer 12
-
£339 GBP
View
B+
Retailer 13
-
£342 GBP
View
B+
Retailer 14
-
£363 GBP
View
B+
Retailer 15
-
£387 GBP
View
Retailer 16
-
£471 GBP
View
Price last confirmed 8 days ago
B
Retailer 17
-
£510 GBP
View
B
Retailer 18
-
£524 GBP
View
B
Retailer 19
-
£539 GBP
View
B
Retailer 20
-
£550 GBP
View
B
Retailer 21
-
£622 GBP
View
Most Expensive
B
MOH London
LG844687850 · Nov 5
£740 GBP
View
21 more retailers have this diamond
Prices start from £128 GBPSave up to £612 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
1.20ct Round
£128 GBP