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Cushion|Lab Grown|IGI

1.55ct E SI1 Cushion Lab Grown Diamond

GD • E/SI1 • IGI LG821628425

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG821628425

Diamond specifications and retailer prices

From £287 GBP
€364 EUR
As of October 29, 2026
Save £491 GBP (63%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £778 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.55ct lab-grown cushion diamond

This 1.55ct 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 standard cut grade and certified by IGI LG821628425 or 821628425. Listed at 5 retailers as of October 29, 2026, with prices from £287 to £778, a £491 spread on the same certified stone. MOH London lists it at £778. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.55
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821628425
Dimensions8.21 × 5.98 × 3.99 mm
L/W Ratio1.37
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.21 mm5.98 mm1.55 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821628425
Side View
Table 62.0%Crown 34.6°Girdle: MED-STKPavilion 37.6°Culet: NoneDepth 66.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: £778 GBP|Low: £213 GBP|High: £825 GBP|Avg: £513 GBP|-4.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 3£213 GBP
Retailer 2£287 GBP
Retailer 4£418 GBP
Retailer 5£699 GBP
MOH London£778 GBP

22 data points across 5 retailers

5 retailers£287 GBP to £778 GBP

Retailer 1
-
£213 GBP
Price last confirmed 13 days ago
A
Retailer 2
-
£287 GBP
€364 EUR
View
B+
Retailer 3
-
£418 GBP
$557 USD
View
Retailer 4
-
£699 GBP
SGD 1,257 SGD
View
Price last confirmed 17 days ago
Most Expensive
B
MOH London
LG821628425 · Oct 29
£778 GBP
View
4 more retailers have this diamond
Prices start from £287 GBPSave up to £491 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
1.55ct Cushion
£287 GBP