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Cushion|Lab Grown|IGI

1.55ct E IF Cushion Lab Grown Diamond

VG • E/IF • IGI LG850682235

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

Certificate IGI LG850682235

Diamond specifications and retailer prices

From £479 GBP
$638 USD
As of October 30, 2026
Save £1,744 GBP (78%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,223 GBP at Brilliant Earth · As of October 28, 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 very-good cut grade and certified by IGI LG850682235 or 850682235. Listed at 6 retailers as of October 28, 2026, with prices from £479 to £2,223, a £1,744 spread on the same certified stone. Brilliant Earth lists it at £2,223. 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
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850682235
Dimensions6.52 × 6.52 × 4.32 mm
L/W Ratio1.00
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
6.52 mm6.52 mm1.55 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850682235
Side View
Table 60.0%Crown 36.9°Girdle: MED-STKPavilion 34.4°Culet: NoneDepth 66.3%

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: £619 GBP|Low: £479 GBP|High: £1,237 GBP|Avg: £794 GBP|+0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 30, 2026
Retailer 4£479 GBP
Retailer 2£597 GBP
Retailer 1£619 GBP
Retailer 3£827 GBP
Retailer 5£1,237 GBP

4 data points across 5 retailers

6 retailers£479 GBP to £2,223 GBP

A
Cheapest Retailer
-
£479 GBP
$638 USD
A
Retailer 2
-
£597 GBP
€757 EUR
View
A
Retailer 3
-
£619 GBP
View
A
Retailer 4
-
£827 GBP
$1,101 USD
View
B+
Retailer 5
-
£1,237 GBP
$1,648 USD
View
Most Expensive
B
Brilliant Earth
22329053A · Oct 28
£2,223 GBP
$2,960 USD
View
5 more retailers have this diamond
Prices start from £479 GBPSave up to £1,744 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