Cushion|Lab Grown|IGI

4.00ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG834612706

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG834612706

Diamond specifications and retailer prices

From £744 GBP
€950 EUR
As of October 27, 2026
Save £3,711 GBP (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,456 GBP at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 4ct lab-grown cushion diamond

This 4ct 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 LG834612706 or 834612706. Listed at 12 retailers as of October 26, 2026, with prices from £744 to £4,456, a £3,711 spread on the same certified stone. Brilliant Earth lists it at £4,456. 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

4.00
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG834612706
Dimensions10.54 × 8.86 × 5.24 mm
L/W Ratio1.19
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.54 mm8.86 mm4.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG834612706
Side View
Table 63.0%Crown 31.6°Girdle: MED-STKPavilion 34.3°Culet: NoneDepth 59.1%

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 27
Current: £4,456 GBP|Low: £372 GBP|High: £4,463 GBP|Avg: £1,259 GBP
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
October 27, 2026
Retailer 6£372 GBP
Retailer 5£402 GBP
Retailer 11£597 GBP
Retailer 12£672 GBP
Retailer 7£734 GBP
Retailer 2£744 GBP
Retailer 3£1,021 GBP
Retailer 9£1,038 GBP
Retailer 4£1,452 GBP
Retailer 13£1,487 GBP
Retailer 10£1,652 GBP
Retailer 8£1,720 GBP
Brilliant Earth£4,456 GBP

33 data points across 13 retailers

12 retailers£744 GBP to £4,456 GBP

Retailer 1
-
£372 GBP
Price last confirmed 10 days ago
Retailer 2
-
£597 GBP
$800 USD
View
Price last confirmed 10 days ago
Retailer 3
-
£672 GBP
$900 USD
View
Price last confirmed 9 days ago
Retailer 4
-
£734 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
-
£744 GBP
€950 EUR
View
Retailer 6
-
£1,021 GBP
$1,368 USD
View
Price last confirmed 10 days ago
Retailer 7
-
£1,038 GBP
$1,391 USD
View
Price last confirmed 9 days ago
Retailer 8
-
£1,452 GBP
$1,945 USD
View
Price last confirmed 10 days ago
Retailer 9
-
£1,487 GBP
$1,993 USD
View
Price last confirmed 10 days ago
Retailer 10
-
£1,652 GBP
View
Price last confirmed 16 days ago
Retailer 11
-
£1,720 GBP
$2,305 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
21669687A · Oct 26
£4,456 GBP
$5,970 USD
View
11 more retailers have this diamond
Prices start from £744 GBPSave up to £3,711 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
4.00ct Cushion
£744 GBP