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Radiant|Lab Grown|IGI

1.18ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG818659433

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

Certificate IGI LG818659433

Diamond specifications and retailer prices

From £189 GBP
$253 USD
As of October 30, 2026
Save £1,393 GBP (88%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,672 GBP at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.18ct lab-grown radiant diamond

This 1.18ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818659433 or 818659433. Listed at 19 retailers as of October 30, 2026, with a 738% 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

1.18
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.2°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818659433
Dimensions7.21 × 5.33 × 3.67 mm
L/W Ratio1.35
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
7.21 mm5.33 mm1.18 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818659433
Side View
Table 62.0%Crown 45.2°Girdle: Slightly ThickPavilion 36.9°Culet: NoneDepth 68.9%

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: £1,672 GBP|Low: £189 GBP|High: £1,918 GBP|Avg: £746 GBP|-1.8%
Rare Carat
Retailer 2
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Retailer 11
Retailer 12
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Retailer 19
October 30, 2026
Retailer 7£189 GBP
Retailer 17£219 GBP
Retailer 9£220 GBP
Retailer 6£234 GBP
Retailer 16£234 GBP
Retailer 15£355 GBP
Retailer 18£391 GBP
Retailer 14£402 GBP
Retailer 8£437 GBP
Retailer 12£446 GBP
Retailer 3£563 GBP
Retailer 19£719 GBP
Retailer 5£752 GBP
Retailer 4£791 GBP
Retailer 11£859 GBP
Retailer 13£943 GBP
Retailer 10£955 GBP
Retailer 2£1,582 GBP
Rare Carat£1,672 GBP

36 data points across 19 retailers

19 retailers£189 GBP to £1,582 GBP

A
Cheapest Retailer
-
£189 GBP
$253 USD
A
Retailer 2
-
£219 GBP
$293 USD
View
A
Retailer 3
-
£220 GBP
$295 USD
View
Final sale: no returns
A
Retailer 4
-
£234 GBP
$314 USD
View
A
Retailer 5
-
£234 GBP
$314 USD
View
A
Retailer 6
-
£355 GBP
$475 USD
View
A
Retailer 7
-
£391 GBP
$524 USD
View
A
Retailer 8
-
£402 GBP
ZAR 8,707 ZAR
View
A
Retailer 9
-
£437 GBP
€558 EUR
View
A
Retailer 10
-
£446 GBP
View
B+
Retailer 11
-
£563 GBP
$754 USD
View
B+
Retailer 12
-
£719 GBP
$964 USD
View
B+
Retailer 13
-
£752 GBP
$1,008 USD
View
B+
Retailer 14
-
£791 GBP
$1,060 USD
View
B+
Retailer 15
-
£859 GBP
SGD 1,556 SGD
View
B+
Retailer 16
-
£943 GBP
View
B
Retailer 17
-
£955 GBP
$1,280 USD
View
B
Retailer 18
-
£1,582 GBP
$2,120 USD
View
Most Expensive
Rare Carat
PD-231402 · Oct 18
£1,672 GBP
$2,240 USD
View
Price last confirmed 11 days ago
18 more retailers have this diamond
Prices start from £189 GBPSave up to £1,393 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
1.18ct Radiant
£189 GBP