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Radiant|Lab Grown|IGI

1.50ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG474113844

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

Certificate IGI LG474113844

Diamond specifications and retailer prices

From £591 GBP
$792 USD
As of October 30, 2026
Save £930 GBP (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,417 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.5ct lab-grown radiant diamond

This 1.5ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG474113844 or 474113844. Listed at 6 retailers as of October 29, 2026, with a 157% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.50
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.5°
Pavilion angle31.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG474113844
Dimensions6.59 × 6.34 × 3.95 mm
L/W Ratio1.04
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
6.59 mm6.34 mm1.50 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG474113844
Side View
Table 59.0%Crown 39.5°Girdle: Slightly ThickPavilion 31.6°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,417 GBP|Low: £422 GBP|High: £2,433 GBP|Avg: £1,365 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 5£591 GBP
Retailer 3£947 GBP
Retailer 4£995 GBP
Retailer 2£996 GBP
MOH London£2,417 GBP

17 data points across 5 retailers

6 retailers£591 GBP to £1,521 GBP

B+
Cheapest Retailer
-
£591 GBP
$792 USD
Final sale: no returns
Retailer 2
-
£947 GBP
€1,208 EUR
View
Price last confirmed 7 days ago
B
Retailer 3
-
£995 GBP
$1,333 USD
View
B
Retailer 4
-
£996 GBP
$1,335 USD
View
B
Retailer 5
-
£1,521 GBP
View
Most Expensive
MOH London
LG474113844 · Oct 29
£2,417 GBP
View
Price under review
5 more retailers have this diamond
Prices start from £591 GBPSave up to £930 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+
1.50ct Radiant
£591 GBP