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Cushion|Lab Grown|IGI

3.01ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG754522117

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

Certificate IGI LG754522117

Diamond specifications and retailer prices

From £379 GBP
As of November 6, 2026
Save £2,348 GBP (86%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £2,727 GBP at Brilliant Earth · As of November 7, 2026
View at Brilliant Earth

About this 3.01ct lab-grown cushion diamond

This 3.01ct 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 LG754522117 or 754522117. Listed at 16 retailers as of November 6, 2026, with prices from £379 to £2,727, a £2,348 spread on the same certified stone. Brilliant Earth lists it at £2,727. 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

3.01
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754522117
Dimensions8.63 × 8.62 × 5.51 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.63 mm8.62 mm3.01 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754522117
Side View
Table 63.0%Crown 38.6°Girdle: STK-THKPavilion 40.4°Culet: NoneDepth 63.9%

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: Nov 6
Current: £2,727 GBP|Low: £346 GBP|High: £2,727 GBP|Avg: £968 GBP|+2.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 7, 2026
Retailer 11£379 GBP
Retailer 4£387 GBP
Retailer 9£497 GBP
Retailer 5£610 GBP
Retailer 3£612 GBP
Retailer 8£633 GBP
Retailer 10£677 GBP
Retailer 15£743 GBP
Retailer 13£991 GBP
Retailer 7£1,270 GBP
Retailer 2£1,345 GBP
Retailer 6£1,411 GBP
Retailer 12£1,419 GBP
Retailer 14£1,453 GBP
Brilliant Earth£2,727 GBP

43 data points across 15 retailers

16 retailers£379 GBP to £2,727 GBP

A
Cheapest Retailer
-
£379 GBP
Final sale: no returns
A
Retailer 2
-
£387 GBP
View
A
Retailer 3
-
£497 GBP
View
B+
Retailer 4
-
£610 GBP
View
A
Retailer 5
-
£612 GBP
View
A
Retailer 6
-
£633 GBP
View
A
Retailer 7
-
£677 GBP
View
A
Retailer 8
-
£743 GBP
View
B+
Retailer 9
-
£991 GBP
View
B+
Retailer 10
-
£1,270 GBP
View
B
Retailer 11
-
£1,345 GBP
View
B
Retailer 12
-
£1,411 GBP
View
B+
Retailer 13
-
£1,419 GBP
View
B
Retailer 14
-
£1,453 GBP
View
B
Retailer 15
-
£2,705 GBP
View
Most Expensive
B
Brilliant Earth
20624929A · Nov 7
£2,727 GBP
$3,650 USD
View
15 more retailers have this diamond
Prices start from £379 GBPSave up to £2,348 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
3.01ct Cushion
£379 GBP