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Radiant|Lab Grown|IGI

1.09ct F SI1 Radiant Lab Grown Diamond

VG • F/SI1 • IGI LG830647097

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

Certificate IGI LG830647097

Diamond specifications and retailer prices

From £104 GBP
$140 USD
As of November 2, 2026
Save £503 GBP (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £608 GBP at MOH London · As of October 29, 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 very-good cut grade and certified by IGI LG830647097 or 830647097. Listed at 10 retailers as of October 29, 2026, with prices from £104 to £608, a £503 spread on the same certified stone. MOH London lists it at £608. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.09
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.8°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830647097
Dimensions7.25 × 5.07 × 3.47 mm
L/W Ratio1.43
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.25 mm5.07 mm1.09 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830647097
Side View
Table 66.0%Crown 43.8°Girdle: MediumPavilion 35.5°Culet: NoneDepth 68.4%

Caratlytics Score

How it works →
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 2
Current: £608 GBP|Low: £100 GBP|High: £1,054 GBP|Avg: £337 GBP|-42.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 5£104 GBP
Retailer 9£121 GBP
Retailer 3£169 GBP
Retailer 2£230 GBP
Retailer 6£320 GBP
Retailer 10£370 GBP
Retailer 7£416 GBP
Retailer 8£437 GBP
Retailer 4£439 GBP
MOH London£608 GBP

27 data points across 10 retailers

10 retailers£104 GBP to £608 GBP

A
Cheapest Retailer
-
£104 GBP
$140 USD
A
Retailer 2
-
£121 GBP
$162 USD
View
A
Retailer 3
-
£230 GBP
€294 EUR
View
B+
Retailer 4
-
£313 GBP
$420 USD
View
B+
Retailer 5
-
£320 GBP
$430 USD
View
B+
Retailer 6
-
£370 GBP
$497 USD
View
B
Retailer 7
-
£416 GBP
$558 USD
View
Retailer 8
-
£437 GBP
SGD 792 SGD
View
Price last confirmed 20 days ago
B
Retailer 9
-
£439 GBP
$589 USD
View
Most Expensive
B
MOH London
LG830647097 · Oct 29
£608 GBP
View
9 more retailers have this diamond
Prices start from £104 GBPSave up to £503 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
1.09ct Radiant
£104 GBP