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Cushion|Lab Grown|IGI

1.59ct G SI2 Cushion Lab Grown Diamond

ID • G/SI2 • IGI LG528233939

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

Certificate IGI LG528233939

Diamond specifications and retailer prices

From £384 GBP
$515 USD
As of November 1, 2026
Save £633 GBP (62%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,017 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.59ct lab-grown cushion diamond

This 1.59ct lab-grown cushion sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG528233939 or 528233939. Listed at 5 retailers as of October 29, 2026, with prices from £384 to £1,017, a £633 spread on the same certified stone. MOH London lists it at £1,017. 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

1.59
Carat
G
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG528233939
Dimensions6.62 × 6.54 × 4.54 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.62 mm6.54 mm1.59 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG528233939
Side View
Table 62.0%Crown 34.5°Girdle: STK-VTKPavilion 39.9°Culet: NoneDepth 69.4%

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 1
Current: £1,017 GBP|Low: £296 GBP|High: £1,017 GBP|Avg: £613 GBP|+27.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 3£384 GBP
Retailer 2£440 GBP
Retailer 4£624 GBP
Retailer 5£807 GBP
MOH London£1,017 GBP

34 data points across 5 retailers

5 retailers£384 GBP to £1,017 GBP

A
Cheapest Retailer
-
£384 GBP
$515 USD
B+
Retailer 2
-
£440 GBP
View
B+
Retailer 3
-
£624 GBP
$836 USD
View
B
Retailer 4
-
£807 GBP
$1,081 USD
View
Most Expensive
B
MOH London
LG528233939 · Oct 29
£1,017 GBP
View
4 more retailers have this diamond
Prices start from £384 GBPSave up to £633 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
1.59ct Cushion
£384 GBP