CaratHunter
Plans
Cushion|Lab Grown|IGI

1.55ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG828682092

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

Certificate IGI LG828682092

Diamond specifications and retailer prices

From £559 GBP
€709 EUR
As of October 29, 2026
Save £1,664 GBP (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,223 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 LG828682092 or 828682092. Listed at 8 retailers as of October 29, 2026, with prices from £559 to £2,223, a £1,664 spread on the same certified stone. Brilliant Earth lists it at £2,223. 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 angle35.9°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828682092
Dimensions6.83 × 6.73 × 4.47 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
6.83 mm6.73 mm1.55 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828682092
Side View
Table 61.0%Crown 35.9°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 66.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £559 GBP|Low: £554 GBP|High: £1,825 GBP|Avg: £1,101 GBP|-17.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 1£559 GBP
Retailer 6£832 GBP
Retailer 2£1,135 GBP
Retailer 4£1,175 GBP
Retailer 7£1,197 GBP
Retailer 3£1,247 GBP
Retailer 5£1,757 GBP

22 data points across 7 retailers

8 retailers£559 GBP to £2,223 GBP

A
Cheapest Retailer
-
£559 GBP
€709 EUR
A
Retailer 2
-
£832 GBP
$1,108 USD
View
B+
Retailer 3
-
£1,135 GBP
SGD 2,043 SGD
View
Retailer 4
-
£1,175 GBP
$1,565 USD
View
Retailer 5
-
£1,197 GBP
A$2,453 AUD
View
Price last confirmed 22 days ago
B+
Retailer 6
-
£1,247 GBP
$1,660 USD
View
Retailer 7
-
£1,757 GBP
$2,340 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
22238923A · Oct 29
£2,223 GBP
$2,960 USD
View
7 more retailers have this diamond
Prices start from £559 GBPSave up to £1,664 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
£559 GBP