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Cushion|Lab Grown|IGI

1.50ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG522225256

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG522225256

Diamond specifications and retailer prices

From £342 GBP
As of November 5, 2026
Save £481 GBP (58%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £824 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion 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 LG522225256 or 522225256. Listed at 6 retailers as of November 5, 2026, with prices from £342 to £824, a £481 spread on the same certified stone. MOH London lists it at £824. 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 angle36.7°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG522225256
Dimensions6.81 × 6.54 × 4.28 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Top View
6.81 mm6.54 mm1.50 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG522225256
Side View
Table 60.0%Crown 36.7°Girdle: STK-THKPavilion 37.9°Culet: NoneDepth 65.4%

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: Nov 5
Current: £824 GBP|Low: £333 GBP|High: £836 GBP|Avg: £503 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 6£342 GBP
Retailer 4£352 GBP
Retailer 2£380 GBP
Retailer 5£451 GBP
Retailer 3£665 GBP
MOH London£824 GBP

41 data points across 6 retailers

6 retailers£342 GBP to £824 GBP

A
Cheapest Retailer
-
£342 GBP
A
Retailer 2
-
£352 GBP
View
A
Retailer 3
-
£380 GBP
View
B+
Retailer 4
-
£451 GBP
View
B+
Retailer 5
-
£665 GBP
View
Most Expensive
B
MOH London
LG522225256 · Nov 5
£824 GBP
View
5 more retailers have this diamond
Prices start from £342 GBPSave up to £481 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 Cushion
£342 GBP