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Cushion|Lab Grown|IGI

1.05ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG665409443

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG665409443

Diamond specifications and retailer prices

From £287 GBP
$385 USD
As of October 31, 2026
Save £922 GBP (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,381 GBP at Brilliant Earth · As of October 12, 2026
View at Brilliant Earth

About this 1.05ct lab-grown cushion diamond

This 1.05ct 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 LG665409443 or 665409443. Listed at 16 retailers as of October 29, 2026, with a 321% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.05
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665409443
Dimensions7.00 × 5.27 × 3.53 mm
L/W Ratio1.33
Girdle conditionFaceted
Culet sizePointed
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
7.00 mm5.27 mm1.05 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665409443
Side View
Table 59.0%Crown 32.8°Girdle: STK-THKPavilion 37.3°Culet: NoneDepth 67.0%

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 31
Current: £1,381 GBP|Low: £269 GBP|High: £1,381 GBP|Avg: £686 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
Retailer 14
Retailer 15
October 31, 2026
Retailer 8£287 GBP
Retailer 14£455 GBP
Retailer 3£478 GBP
Retailer 15£480 GBP
Retailer 5£487 GBP
Retailer 2£499 GBP
Retailer 13£516 GBP
Retailer 9£532 GBP
Retailer 12£729 GBP
Retailer 11£763 GBP
Retailer 4£780 GBP
Retailer 7£998 GBP
Retailer 6£1,187 GBP
Retailer 10£1,209 GBP
Brilliant Earth£1,381 GBP

39 data points across 15 retailers

16 retailers£287 GBP to £1,209 GBP

A
Cheapest Retailer
-
£287 GBP
$385 USD
Final sale: no returns
A
Retailer 2
-
£455 GBP
$610 USD
View
A
Retailer 3
-
£478 GBP
$641 USD
View
A
Retailer 4
-
£480 GBP
$643 USD
View
A
Retailer 5
-
£487 GBP
$653 USD
View
A
Retailer 6
-
£499 GBP
€637 EUR
View
A
Retailer 7
-
£516 GBP
ZAR 11,166 ZAR
View
A
Retailer 8
-
£532 GBP
View
B+
Retailer 9
-
£729 GBP
A$1,503 AUD
View
B+
Retailer 10
-
£763 GBP
A$1,573 AUD
View
B+
Retailer 11
-
£780 GBP
$1,045 USD
View
B
Retailer 12
-
£998 GBP
$1,338 USD
View
B
Retailer 13
-
£1,135 GBP
$1,521 USD
View
B
Retailer 14
-
£1,187 GBP
$1,591 USD
View
B
Retailer 15
-
£1,209 GBP
View
Most Expensive
Brilliant Earth
14719488A · Oct 12
£1,381 GBP
$1,850 USD
View
Price last confirmed 19 days ago
15 more retailers have this diamond
Prices start from £287 GBPSave up to £922 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
1.05ct Cushion
£287 GBP