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Radiant|Lab Grown|IGI

1.50ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG647447808

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

Certificate IGI LG647447808

Diamond specifications and retailer prices

From £156 GBP
$209 USD
As of October 25, 2026
Save £658 GBP (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £813 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

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 LG647447808 or 647447808. Listed at 16 retailers as of October 25, 2026, with prices from £156 to £813, a £658 spread on the same certified stone. Brilliant Earth lists it at £813. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.6°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG647447808
Dimensions7.93 × 5.74 × 3.82 mm
L/W Ratio1.38
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.93 mm5.74 mm1.50 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG647447808
Side View
Table 66.0%Crown 42.6°Girdle: MediumPavilion 35.3°Culet: NoneDepth 66.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 25
Current: £813 GBP|Low: £146 GBP|High: £963 GBP|Avg: £392 GBP|-15.5%
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
October 30, 2026
Retailer 14£146 GBP
Retailer 4£154 GBP
Retailer 8£156 GBP
Retailer 11£201 GBP
Retailer 2£277 GBP
Retailer 12£280 GBP
Retailer 3£291 GBP
Retailer 10£295 GBP
Retailer 6£327 GBP
Retailer 5£407 GBP
Retailer 9£530 GBP
Retailer 13£646 GBP
Retailer 7£734 GBP
Brilliant Earth£813 GBP

38 data points across 14 retailers

16 retailers£156 GBP to £813 GBP

Retailer 1
-
£146 GBP
$196 USD
Price last confirmed 33 days ago
Retailer 2
-
£154 GBP
$206 USD
View
Price last confirmed 33 days ago
Retailer 3
-
£156 GBP
$209 USD
View
Price last confirmed 18 days ago
A
Retailer 4
-
£156 GBP
$209 USD
View
Retailer 5
-
£201 GBP
View
Price last confirmed 14 days ago
A
Retailer 6
-
£277 GBP
View
B+
Retailer 7
-
£280 GBP
$375 USD
View
Retailer 8
-
£291 GBP
View
Price last confirmed 22 days ago
Retailer 9
-
£295 GBP
€377 EUR
View
Price last confirmed 7 days ago
A
Retailer 10
-
£327 GBP
$438 USD
View
B+
Retailer 11
-
£407 GBP
$545 USD
View
B
Retailer 12
-
£530 GBP
$710 USD
View
B+
Retailer 13
-
£548 GBP
View
Retailer 14
-
£646 GBP
$865 USD
View
Price last confirmed 9 days ago
B
Retailer 15
-
£734 GBP
View
Most Expensive
B
Brilliant Earth
11455293A · Oct 30
£813 GBP
$1,090 USD
View
15 more retailers have this diamond
Prices start from £156 GBPSave up to £658 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
1.50ct Radiant
£156 GBP