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Cushion|Lab Grown|IGI

1.50ct G SI1 Cushion Lab Grown Diamond

ID • G/SI1 • IGI LG750586531

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG750586531

Diamond specifications and retailer prices

From £290 GBP
As of November 6, 2026
Save £569 GBP (66%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £859 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG750586531 or 750586531. Listed at 5 retailers as of November 5, 2026, with prices from £290 to £859, a £569 spread on the same certified stone. MOH London lists it at £859. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG750586531
Dimensions6.47 × 6.44 × 4.27 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.47 mm6.44 mm1.50 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG750586531
Side View
Table 59.0%Crown 38.6°Girdle: STK-VTKPavilion 34°Culet: NoneDepth 66.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £859 GBP|Low: £290 GBP|High: £871 GBP|Avg: £505 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4£290 GBP
Retailer 5£362 GBP
Retailer 2£400 GBP
Retailer 3£643 GBP
MOH London£859 GBP

38 data points across 5 retailers

5 retailers£290 GBP to £859 GBP

B+
Cheapest Retailer
-
£290 GBP
A
Retailer 2
-
£362 GBP
View
A
Retailer 3
-
£400 GBP
View
B+
Retailer 4
-
£643 GBP
View
Most Expensive
B
MOH London
LG750586531 · Nov 5
£859 GBP
View
4 more retailers have this diamond
Prices start from £290 GBPSave up to £569 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
£290 GBP