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Cushion|Lab Grown|IGI

1.55ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG818620978

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

Certificate IGI LG818620978

Diamond specifications and retailer prices

From £479 GBP
$638 USD
As of October 28, 2026
Save £1,000 GBP (68%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,479 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818620978 or 818620978. Listed at 8 retailers as of October 28, 2026, with prices from £479 to £1,479, a £1,000 spread on the same certified stone. MOH London lists it at £1,479. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
E
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818620978
Dimensions6.70 × 6.64 × 4.23 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.70 mm6.64 mm1.55 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818620978
Side View
Table 58.0%Crown 37.1°Girdle: MED-THKPavilion 35.5°Culet: NoneDepth 63.7%

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: Oct 28
Current: £1,479 GBP|Low: £479 GBP|High: £1,490 GBP|Avg: £857 GBP|-0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 4£479 GBP
Retailer 6£559 GBP
Retailer 3£606 GBP
Retailer 2£619 GBP
Retailer 7£827 GBP
Retailer 5£1,197 GBP
Retailer 8£1,237 GBP
MOH London£1,479 GBP

38 data points across 8 retailers

8 retailers£479 GBP to £1,479 GBP

A
Cheapest Retailer
-
£479 GBP
$638 USD
A
Retailer 2
-
£559 GBP
$745 USD
View
A
Retailer 3
-
£606 GBP
€768 EUR
View
A
Retailer 4
-
£619 GBP
View
A
Retailer 5
-
£827 GBP
$1,101 USD
View
Retailer 6
-
£1,197 GBP
A$2,453 AUD
View
Price last confirmed 21 days ago
B+
Retailer 7
-
£1,237 GBP
$1,648 USD
View
Most Expensive
B+
MOH London
LG818620978 · Oct 29
£1,479 GBP
View
7 more retailers have this diamond
Prices start from £479 GBPSave up to £1,000 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
£479 GBP