CaratHunter
Plans
Cushion|Lab Grown|IGI

1.05ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG816610575

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

Certificate IGI LG816610575

Diamond specifications and retailer prices

From £253 GBP
$339 USD
As of October 30, 2026
Save £1,090 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,343 GBP at Brilliant Earth · As of October 30, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816610575 or 816610575. Listed at 14 retailers as of October 30, 2026, with prices from £253 to £1,343, a £1,090 spread on the same certified stone. Brilliant Earth lists it at £1,343. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle42.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816610575
Dimensions5.85 × 5.84 × 4.06 mm
L/W Ratio1.00
Girdle conditionFaceted
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
5.85 mm5.84 mm1.05 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816610575
Side View
Table 63.0%Crown 35.8°Girdle: MED-STKPavilion 42.7°Culet: NoneDepth 69.5%

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: £1,343 GBP|Low: £253 GBP|High: £1,590 GBP|Avg: £712 GBP|-15.5%
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
October 30, 2026
Retailer 13£253 GBP
Retailer 2£298 GBP
Retailer 6£315 GBP
Retailer 3£459 GBP
Retailer 8£460 GBP
Retailer 12£475 GBP
Retailer 11£478 GBP
Retailer 9£483 GBP
Retailer 7£499 GBP
Retailer 4£938 GBP
Retailer 5£1,000 GBP
Retailer 14£1,127 GBP
Retailer 10£1,137 GBP
Brilliant Earth£1,343 GBP

38 data points across 14 retailers

14 retailers£253 GBP to £1,343 GBP

A
Cheapest Retailer
-
£253 GBP
$339 USD
Final sale: no returns
A
Retailer 2
-
£298 GBP
View
Retailer 3
-
£315 GBP
$422 USD
View
Price last confirmed 18 days ago
A
Retailer 4
-
£459 GBP
$615 USD
View
A
Retailer 5
-
£460 GBP
€587 EUR
View
A
Retailer 6
-
£475 GBP
$636 USD
View
A
Retailer 7
-
£478 GBP
$640 USD
View
A
Retailer 8
-
£483 GBP
ZAR 10,449 ZAR
View
A
Retailer 9
-
£499 GBP
View
B+
Retailer 10
-
£938 GBP
$1,257 USD
View
Retailer 11
-
£1,000 GBP
$1,340 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
£1,127 GBP
View
B
Retailer 13
-
£1,137 GBP
$1,524 USD
View
Most Expensive
B
Brilliant Earth
21019001A · Oct 30
£1,343 GBP
$1,800 USD
View
13 more retailers have this diamond
Prices start from £253 GBPSave up to £1,090 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
£253 GBP