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Radiant|Lab Grown|IGI

1.09ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG635497403

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

Certificate IGI LG635497403

Diamond specifications and retailer prices

From £156 GBP
$209 USD
As of October 30, 2026
Save £756 GBP (83%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,396 GBP at Brilliant Earth · As of October 15, 2026
View at Brilliant Earth

About this 1.09ct lab-grown radiant diamond

This 1.09ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG635497403 or 635497403. Listed at 24 retailers as of October 30, 2026, with a 485% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG635497403
Dimensions7.19 × 5.13 × 3.49 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.19 mm5.13 mm1.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG635497403
Side View
Table 65.0%Crown 43°Girdle: MED-STKPavilion 34.7°Culet: NoneDepth 68.0%

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: Oct 30
Current: £1,396 GBP|Low: £150 GBP|High: £1,470 GBP|Avg: £482 GBP|+1.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
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Retailer 6
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Retailer 11
Retailer 12
Retailer 13
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Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 6£156 GBP
Retailer 4£175 GBP
Retailer 9£181 GBP
Retailer 7£193 GBP
Retailer 10£193 GBP
Retailer 3£206 GBP
Retailer 17£261 GBP
Retailer 14£314 GBP
Retailer 12£334 GBP
Retailer 2£357 GBP
Retailer 11£428 GBP
Retailer 15£471 GBP
Retailer 18£473 GBP
Retailer 8£622 GBP
Retailer 16£699 GBP
Retailer 13£775 GBP
Retailer 19£903 GBP
Retailer 5£912 GBP
Brilliant Earth£1,396 GBP

39 data points across 19 retailers

24 retailers£156 GBP to £912 GBP

A
Cheapest Retailer
-
£156 GBP
$209 USD
A
Retailer 2
-
£175 GBP
$234 USD
View
Final sale: no returns
A
Retailer 3
-
£181 GBP
$242 USD
View
Retailer 4
-
£193 GBP
$259 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£193 GBP
$259 USD
View
Retailer 6
-
£206 GBP
View
Price last confirmed 16 days ago
A
Retailer 7
-
£261 GBP
$350 USD
View
A
Retailer 8
-
£314 GBP
€401 EUR
View
A
Retailer 9
-
£334 GBP
ZAR 7,229 ZAR
View
A
Retailer 10
-
£357 GBP
View
A
Retailer 11
-
£394 GBP
$528 USD
View
A
Retailer 12
-
£428 GBP
$573 USD
View
A
Retailer 13
-
£471 GBP
$631 USD
View
A
Retailer 14
-
£473 GBP
A$975 AUD
View
A
Retailer 15
-
£480 GBP
$643 USD
View
B+
Retailer 16
-
£622 GBP
$833 USD
View
B+
Retailer 17
-
£661 GBP
$885 USD
View
B+
Retailer 18
-
£662 GBP
$886 USD
View
B+
Retailer 19
-
£699 GBP
A$1,441 AUD
View
B+
Retailer 20
-
£704 GBP
View
B+
Retailer 21
-
£775 GBP
View
Retailer 22
-
£903 GBP
$1,210 USD
View
Price last confirmed 14 days ago
B
Retailer 23
-
£912 GBP
$1,222 USD
View
Most Expensive
Brilliant Earth
10800488A · Oct 15
£1,396 GBP
$1,870 USD
View
Price last confirmed 17 days ago
23 more retailers have this diamond
Prices start from £156 GBPSave up to £756 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
£156 GBP