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Cushion|Lab Grown|IGI

1.03ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG841628633

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

Certificate IGI LG841628633

Diamond specifications and retailer prices

From £402 GBP
$539 USD
As of October 30, 2026
Save £1,023 GBP (72%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,425 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.03ct lab-grown cushion diamond

This 1.03ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG841628633 or 841628633. Listed at 10 retailers as of October 29, 2026, with prices from £402 to £1,425, a £1,023 spread on the same certified stone. Brilliant Earth lists it at £1,425. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841628633
Dimensions5.87 × 5.85 × 3.79 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
5.87 mm5.85 mm1.03 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841628633
Side View
Table 64.0%Crown 32.7°Girdle: MED-STKPavilion 37.7°Culet: NoneDepth 64.8%

Caratlytics Score

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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: £851 GBP|Low: £402 GBP|High: £1,009 GBP|Avg: £674 GBP|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 2£402 GBP
Retailer 8£430 GBP
Retailer 9£451 GBP
Retailer 4£478 GBP
Retailer 6£747 GBP
Retailer 3£816 GBP
Retailer 1£851 GBP
Retailer 7£963 GBP
Retailer 5£999 GBP

22 data points across 9 retailers

10 retailers£402 GBP to £1,425 GBP

A
Cheapest Retailer
-
£402 GBP
$539 USD
A
Retailer 2
-
£430 GBP
$576 USD
View
A
Retailer 3
-
£451 GBP
$604 USD
View
A
Retailer 4
-
£478 GBP
View
B+
Retailer 5
-
£747 GBP
A$1,540 AUD
View
B+
Retailer 6
-
£816 GBP
$1,093 USD
View
B+
Retailer 7
-
£851 GBP
$1,140 USD
View
Retailer 8
-
£963 GBP
$1,290 USD
View
Price last confirmed 12 days ago
B+
Retailer 9
-
£999 GBP
View
Most Expensive
B
Brilliant Earth
22302465A · Oct 29
£1,425 GBP
$1,910 USD
View
9 more retailers have this diamond
Prices start from £402 GBPSave up to £1,023 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
1.03ct Cushion
£402 GBP