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Radiant|Lab Grown|IGI

1.09ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG581338917

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG581338917

Diamond specifications and retailer prices

From £493 GBP
As of November 2, 2026
8 retailers carry this diamond
Most expensive: £719 GBP at MOH London · As of October 15, 2026
View at MOH London

About this 1.09ct lab-grown radiant diamond

This 1.09ct lab-grown radiant sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG581338917 or 581338917. Listed at 8 retailers as of November 2, 2026. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.09
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.5°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG581338917
Dimensions7.43 × 5.07 × 3.40 mm
L/W Ratio1.47
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.43 mm5.07 mm1.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG581338917
Side View
Table 65.0%Crown 41.5°Girdle: THN-MEDPavilion 34.9°Culet: NoneDepth 67.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £719 GBP|Low: £107 GBP|High: £1,066 GBP|Avg: £424 GBP|+4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 16, 2026
Retailer 5£111 GBP
Retailer 11£124 GBP
Retailer 10£129 GBP
Retailer 4£199 GBP
Retailer 8£253 GBP
Retailer 6£432 GBP
Retailer 2£468 GBP
Retailer 7£489 GBP
Retailer 9£518 GBP
MOH London£719 GBP
Retailer 3£1,066 GBP

27 data points across 11 retailers

8 retailers

Retailer 1
-
£111 GBP
$149 USD
Price last confirmed 25 days ago
Retailer 2
-
£129 GBP
$173 USD
View
Price last confirmed 19 days ago
Retailer 3
-
£253 GBP
$339 USD
View
Price last confirmed 17 days ago
Retailer 4
-
£432 GBP
$580 USD
View
Price last confirmed 18 days ago
Retailer 5
-
£468 GBP
$628 USD
View
Price last confirmed 17 days ago
Retailer 6
-
£489 GBP
$656 USD
View
Price last confirmed 33 days ago
B
Retailer 7
-
£493 GBP
View
Most Expensive
MOH London
LG581338917 · Oct 15
£719 GBP
View
Price last confirmed 18 days ago
7 more retailers have this diamond
Prices start from £493 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.

B
1.09ct Radiant
£493 GBP