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Cushion|Lab Grown|IGI

1.00ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG658492612

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG658492612

Diamond specifications and retailer prices

From £326 GBP
$437 USD
As of October 30, 2026
Save £1,114 GBP (77%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,440 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1ct lab-grown cushion diamond

This 1ct 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 LG658492612 or 658492612. Listed at 19 retailers as of October 29, 2026, with prices from £326 to £1,440, a £1,114 spread on the same certified stone. Brilliant Earth lists it at £1,440. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG658492612
Dimensions7.36 × 5.19 × 3.41 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.36 mm5.19 mm1.00 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG658492612
Side View
Table 60.0%Crown 33.2°Girdle: MED-THKPavilion 34.2°Culet: NoneDepth 65.7%

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 30
Current: £1,440 GBP|Low: £326 GBP|High: £1,440 GBP|Avg: £728 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 30, 2026
Retailer 5£326 GBP
Retailer 4£361 GBP
Retailer 3£470 GBP
Retailer 13£494 GBP
Retailer 7£568 GBP
Retailer 2£592 GBP
Retailer 10£621 GBP
Retailer 8£768 GBP
Retailer 6£880 GBP
Retailer 12£885 GBP
Retailer 11£940 GBP
Retailer 9£1,419 GBP
Brilliant Earth£1,440 GBP

44 data points across 13 retailers

19 retailers£326 GBP to £1,440 GBP

A
Cheapest Retailer
-
£326 GBP
$437 USD
Final sale: no returns
A
Retailer 2
-
£361 GBP
$484 USD
View
A
Retailer 3
-
£368 GBP
$493 USD
View
A
Retailer 4
-
£470 GBP
$630 USD
View
A
Retailer 5
-
£494 GBP
$662 USD
View
A
Retailer 6
-
£568 GBP
€725 EUR
View
A
Retailer 7
-
£592 GBP
View
A
Retailer 8
-
£621 GBP
ZAR 13,435 ZAR
View
B+
Retailer 9
-
£768 GBP
A$1,584 AUD
View
B+
Retailer 10
-
£880 GBP
A$1,815 AUD
View
B+
Retailer 11
-
£885 GBP
$1,186 USD
View
B+
Retailer 12
-
£940 GBP
$1,260 USD
View
Retailer 13
-
£940 GBP
$1,260 USD
View
Price last confirmed 32 days ago
B
Retailer 14
-
£1,058 GBP
View
B
Retailer 15
-
£1,189 GBP
$1,593 USD
View
B
Retailer 16
-
£1,344 GBP
$1,801 USD
View
B
Retailer 17
-
£1,349 GBP
$1,808 USD
View
B
Retailer 18
-
£1,419 GBP
View
Most Expensive
B
Brilliant Earth
14013277A · Oct 29
£1,440 GBP
$1,930 USD
View
18 more retailers have this diamond
Prices start from £326 GBPSave up to £1,114 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
1.00ct Cushion
£326 GBP