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Cushion|Lab Grown|IGI

3.03ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG668409647

Shape and cutting style on the report: Cushion modified brilliant cut

Certificate IGI LG668409647

Diamond specifications and retailer prices

From £268 GBP
$359 USD
As of October 31, 2026
Save £2,501 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,769 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.03ct lab-grown cushion diamond

This 3.03ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG668409647 or 668409647. Listed at 10 retailers as of October 29, 2026, with prices from £268 to £2,769, a £2,501 spread on the same certified stone. Brilliant Earth lists it at £2,769. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.03
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle32.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG668409647
Dimensions9.18 × 7.52 × 5.18 mm
L/W Ratio1.22
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.18 mm7.52 mm3.03 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG668409647
Side View
Table 59.0%Crown 38.1°Girdle: STK-VTKPavilion 32.8°Culet: NoneDepth 68.9%

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 31
Current: £2,769 GBP|Low: £268 GBP|High: £2,769 GBP|Avg: £790 GBP|+7.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 10£268 GBP
Retailer 9£305 GBP
Retailer 8£463 GBP
Retailer 5£487 GBP
Retailer 2£534 GBP
Retailer 6£534 GBP
Retailer 4£538 GBP
Retailer 3£728 GBP
Retailer 7£1,230 GBP
Brilliant Earth£2,769 GBP

41 data points across 10 retailers

10 retailers£268 GBP to £2,769 GBP

A
Cheapest Retailer
-
£268 GBP
$359 USD
Final sale: no returns
A
Retailer 2
-
£305 GBP
$409 USD
View
A
Retailer 3
-
£463 GBP
$620 USD
View
B+
Retailer 4
-
£487 GBP
$653 USD
View
A
Retailer 5
-
£534 GBP
View
A
Retailer 6
-
£534 GBP
€682 EUR
View
A
Retailer 7
-
£538 GBP
$721 USD
View
A
Retailer 8
-
£728 GBP
$975 USD
View
B+
Retailer 9
-
£1,230 GBP
View
Most Expensive
B
Brilliant Earth
13161186A · Oct 29
£2,769 GBP
$3,710 USD
View
9 more retailers have this diamond
Prices start from £268 GBPSave up to £2,501 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
3.03ct Cushion
£268 GBP