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Radiant|Lab Grown|IGI

3.09ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG754564236

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

Certificate IGI LG754564236

Diamond specifications and retailer prices

From £254 GBP
$341 USD
As of October 30, 2026
Save £2,037 GBP (89%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £2,291 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.09ct lab-grown radiant diamond

This 3.09ct lab-grown radiant sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG754564236 or 754564236. Listed at 18 retailers as of October 30, 2026, with prices from £254 to £2,291, a £2,037 spread on the same certified stone. Brilliant Earth lists it at £2,291. 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

3.09
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754564236
Dimensions10.57 × 7.25 × 4.84 mm
L/W Ratio1.46
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.57 mm7.25 mm3.09 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754564236
Side View
Table 65.0%Crown 37.8°Girdle: MediumPavilion 35.6°Culet: NoneDepth 66.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £2,291 GBP|Low: £251 GBP|High: £2,343 GBP|Avg: £690 GBP|-1.6%
Brilliant Earth
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 18£254 GBP
Retailer 5£284 GBP
Retailer 15£295 GBP
Retailer 14£315 GBP
Retailer 17£315 GBP
Retailer 3£388 GBP
Retailer 7£424 GBP
Retailer 13£425 GBP
Retailer 12£501 GBP
Retailer 6£553 GBP
Retailer 2£565 GBP
Retailer 9£775 GBP
Retailer 4£924 GBP
Retailer 16£1,013 GBP
Retailer 10£1,045 GBP
Retailer 8£1,226 GBP
Retailer 11£1,263 GBP
Brilliant Earth£2,291 GBP

39 data points across 18 retailers

18 retailers£254 GBP to £2,291 GBP

A
Cheapest Retailer
-
£254 GBP
$341 USD
A
Retailer 2
-
£284 GBP
$381 USD
View
Final sale: no returns
A
Retailer 3
-
£295 GBP
$395 USD
View
A
Retailer 4
-
£315 GBP
$422 USD
View
Retailer 5
-
£315 GBP
$422 USD
View
Price last confirmed 8 days ago
Retailer 6
-
£388 GBP
View
Price last confirmed 16 days ago
B+
Retailer 7
-
£424 GBP
$568 USD
View
A
Retailer 8
-
£425 GBP
$570 USD
View
A
Retailer 9
-
£501 GBP
€639 EUR
View
A
Retailer 10
-
£553 GBP
$741 USD
View
A
Retailer 11
-
£565 GBP
View
B+
Retailer 12
-
£775 GBP
$1,038 USD
View
B+
Retailer 13
-
£924 GBP
$1,238 USD
View
B+
Retailer 14
-
£1,013 GBP
$1,357 USD
View
B+
Retailer 15
-
£1,045 GBP
$1,400 USD
View
B+
Retailer 16
-
£1,226 GBP
$1,642 USD
View
B+
Retailer 17
-
£1,263 GBP
View
Most Expensive
B
Brilliant Earth
18587410A · Oct 31
£2,291 GBP
$3,070 USD
View
17 more retailers have this diamond
Prices start from £254 GBPSave up to £2,037 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
3.09ct Radiant
£254 GBP