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Cushion|Lab Grown|IGI

1.55ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG825633211

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

Certificate IGI LG825633211

Diamond specifications and retailer prices

From £389 GBP
As of October 30, 2026
Save £1,954 GBP (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,343 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 LG825633211 or 825633211. Listed at 10 retailers as of October 29, 2026, with prices from £389 to £2,343, a £1,954 spread on the same certified stone. Brilliant Earth lists it at £2,343. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825633211
Dimensions6.73 × 6.55 × 4.17 mm
L/W Ratio1.03
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
6.73 mm6.55 mm1.55 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825633211
Side View
Table 60.0%Crown 34.8°Girdle: STK-THKPavilion 34°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 30
Current: £2,343 GBP|Low: £389 GBP|High: £2,365 GBP|Avg: £1,127 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 3£389 GBP
Retailer 8£507 GBP
Retailer 4£619 GBP
Retailer 5£662 GBP
Retailer 9£827 GBP
Retailer 10£1,238 GBP
Retailer 2£1,387 GBP
Retailer 6£1,481 GBP
Retailer 7£1,768 GBP
Brilliant Earth£2,343 GBP

41 data points across 10 retailers

10 retailers£389 GBP to £2,343 GBP

A
Cheapest Retailer
-
£389 GBP
A
Retailer 2
-
£507 GBP
$675 USD
View
A
Retailer 3
-
£619 GBP
View
A
Retailer 4
-
£662 GBP
€839 EUR
View
A
Retailer 5
-
£827 GBP
$1,101 USD
View
B+
Retailer 6
-
£1,238 GBP
$1,649 USD
View
B+
Retailer 7
-
£1,387 GBP
$1,847 USD
View
B+
Retailer 8
-
£1,481 GBP
View
Retailer 9
-
£1,768 GBP
$2,355 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
21322734A · Oct 29
£2,343 GBP
$3,120 USD
View
9 more retailers have this diamond
Prices start from £389 GBPSave up to £1,954 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
£389 GBP