Cushion|Lab Grown|IGI

1.03ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG818663185

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

Certificate IGI LG818663185

Diamond specifications and retailer prices

From £405 GBP
As of October 24, 2026
Save £789 GBP (66%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,194 GBP at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.03ct lab-grown cushion diamond

This 1.03ct 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 LG818663185 or 818663185. Listed at 11 retailers as of October 24, 2026, with prices from £405 to £1,194, a £789 spread on the same certified stone. Brilliant Earth lists it at £1,194. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663185
Dimensions6.08 × 6.02 × 3.81 mm
L/W Ratio1.01
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
6.08 mm6.02 mm1.03 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663185
Side View
Table 62.0%Crown 34.1°Girdle: MED-STKPavilion 39.3°Culet: NoneDepth 63.3%

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 24
Current: £1,194 GBP|Low: £154 GBP|High: £1,231 GBP|Avg: £573 GBP|-3.0%
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
October 24, 2026
Retailer 12£199 GBP
Retailer 4£222 GBP
Retailer 6£368 GBP
Retailer 5£373 GBP
Retailer 3£375 GBP
Retailer 7£375 GBP
Retailer 2£405 GBP
Retailer 10£443 GBP
Retailer 11£752 GBP
Retailer 9£899 GBP
Retailer 8£963 GBP
Retailer 13£985 GBP
Brilliant Earth£1,194 GBP

30 data points across 13 retailers

11 retailers£405 GBP to £1,194 GBP

Retailer 1
-
£222 GBP
$297 USD
Price last confirmed 18 days ago
Retailer 2
-
£368 GBP
€469 EUR
View
Price last confirmed 7 days ago
Retailer 3
-
£375 GBP
$502 USD
View
Price last confirmed 7 days ago
Retailer 4
-
£375 GBP
ZAR 8,119 ZAR
View
Price last confirmed 7 days ago
A
Retailer 5
-
£405 GBP
View
Retailer 6
-
£443 GBP
$594 USD
View
Price last confirmed 7 days ago
Retailer 7
-
£752 GBP
$1,007 USD
View
Price last confirmed 7 days ago
Retailer 8
-
£899 GBP
View
Price last confirmed 20 days ago
Retailer 9
-
£963 GBP
$1,290 USD
View
Price last confirmed 12 days ago
Retailer 10
-
£985 GBP
$1,320 USD
View
Price last confirmed 7 days ago
Most Expensive
B
Brilliant Earth
21242453A · Oct 24
£1,194 GBP
$1,600 USD
View
10 more retailers have this diamond
Prices start from £405 GBPSave up to £789 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
1.03ct Cushion
£405 GBP