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Cushion|Lab Grown|IGI

1.05ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG818657598

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

Certificate IGI LG818657598

Diamond specifications and retailer prices

From £262 GBP
$351 USD
As of October 30, 2026
Save £1,111 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,373 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 standard cut grade and certified by IGI LG818657598 or 818657598. Listed at 14 retailers as of October 30, 2026, with prices from £262 to £1,373, a £1,111 spread on the same certified stone. Brilliant Earth lists it at £1,373. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.05
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle42.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818657598
Dimensions6.15 × 5.99 × 3.89 mm
L/W Ratio1.03
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
6.15 mm5.99 mm1.05 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818657598
Side View
Table 61.0%Crown 34.7°Girdle: THN-STKPavilion 42.2°Culet: NoneDepth 64.9%

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: Oct 30
Current: £1,373 GBP|Low: £210 GBP|High: £1,597 GBP|Avg: £733 GBP|-14.0%
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 31, 2026
Retailer 12£262 GBP
Retailer 6£321 GBP
Retailer 7£440 GBP
Retailer 13£472 GBP
Retailer 8£476 GBP
Retailer 11£477 GBP
Retailer 9£499 GBP
Retailer 2£513 GBP
Retailer 3£525 GBP
Retailer 14£968 GBP
Retailer 5£1,000 GBP
Retailer 10£1,162 GBP
Retailer 4£1,254 GBP
Brilliant Earth£1,373 GBP

36 data points across 14 retailers

14 retailers£262 GBP to £1,373 GBP

A
Cheapest Retailer
-
£262 GBP
$351 USD
Final sale: no returns
Retailer 2
-
£321 GBP
$430 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
£440 GBP
$590 USD
View
A
Retailer 4
-
£472 GBP
$633 USD
View
A
Retailer 5
-
£476 GBP
€607 EUR
View
A
Retailer 6
-
£477 GBP
$639 USD
View
A
Retailer 7
-
£499 GBP
ZAR 10,806 ZAR
View
A
Retailer 8
-
£513 GBP
View
A
Retailer 9
-
£525 GBP
$704 USD
View
B
Retailer 10
-
£968 GBP
$1,297 USD
View
Retailer 11
-
£1,000 GBP
$1,340 USD
View
Price last confirmed 12 days ago
B
Retailer 12
-
£1,162 GBP
$1,557 USD
View
B
Retailer 13
-
£1,254 GBP
View
Most Expensive
B
Brilliant Earth
21241761A · Oct 30
£1,373 GBP
$1,840 USD
View
13 more retailers have this diamond
Prices start from £262 GBPSave up to £1,111 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
£262 GBP