Princess|Lab Grown|IGI

1.20ct F VS1 Princess Lab Grown Diamond

EX • F/VS1 • IGI LG839682734

Shape and cutting style on the report: Princess cut

Certificate IGI LG839682734

Diamond specifications and retailer prices

From £203 GBP
As of November 5, 2026
Save £548 GBP (73%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £750 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.2ct lab-grown princess diamond

This 1.2ct lab-grown princess 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 LG839682734 or 839682734. Listed at 8 retailers as of November 4, 2026, with prices from £203 to £750, a £548 spread on the same certified stone. Brilliant Earth lists it at £750. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839682734
Dimensions5.79 × 5.74 × 4.12 mm
L/W Ratio1.01
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.79 mm5.74 mm1.20 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839682734
Side View
Table 65.0%Crown 40°Girdle: MediumPavilion 38.3°Culet: NoneDepth 71.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £750 GBP|Low: £203 GBP|High: £750 GBP|Avg: £377 GBP|+9.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 7£203 GBP
Retailer 8£233 GBP
Retailer 6£256 GBP
Retailer 4£312 GBP
Retailer 9£317 GBP
Retailer 3£388 GBP
Retailer 5£552 GBP
Retailer 2£635 GBP
Brilliant Earth£750 GBP

11 data points across 9 retailers

8 retailers£203 GBP to £750 GBP

A
Cheapest Retailer
-
£203 GBP
B+
Retailer 2
-
£233 GBP
View
A
Retailer 3
-
£256 GBP
View
Retailer 4
-
£312 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£388 GBP
View
Retailer 6
-
£552 GBP
View
Price last confirmed 9 days ago
B
Retailer 7
-
£635 GBP
View
Most Expensive
B
Brilliant Earth
22272087A · Nov 4
£750 GBP
$1,010 USD
View
7 more retailers have this diamond
Prices start from £203 GBPSave up to £548 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 Princess
£203 GBP