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Cushion|Lab Grown|IGI

1.03ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG788630352

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG788630352

Diamond specifications and retailer prices

From £341 GBP
As of November 4, 2026
Save £704 GBP (67%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,044 GBP at Brilliant Earth · As of November 4, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG788630352 or 788630352. Listed at 14 retailers as of November 4, 2026, with prices from £341 to £1,044, a £704 spread on the same certified stone. Brilliant Earth lists it at £1,044. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788630352
Dimensions7.12 × 5.10 × 3.43 mm
L/W Ratio1.40
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
7.12 mm5.10 mm1.03 ctD / IF
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788630352
Side View
Table 61.0%Crown 33.2°Girdle: MED-STKPavilion 34.2°Culet: NoneDepth 67.3%

Caratlytics Score

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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: Nov 4
Current: £1,044 GBP|Low: £187 GBP|High: £1,578 GBP|Avg: £560 GBP|-33.8%
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
November 4, 2026
Retailer 12£187 GBP
Retailer 5£207 GBP
Retailer 10£341 GBP
Retailer 14£353 GBP
Retailer 8£359 GBP
Retailer 13£381 GBP
Retailer 2£384 GBP
Retailer 3£427 GBP
Retailer 7£550 GBP
Retailer 6£606 GBP
Retailer 4£706 GBP
Retailer 9£832 GBP
Retailer 11£1,015 GBP
Brilliant Earth£1,044 GBP

42 data points across 14 retailers

14 retailers£341 GBP to £1,044 GBP

Retailer 1
-
£187 GBP
Price last confirmed 9 days ago
Final sale: no returns
Retailer 2
-
£207 GBP
View
Price last confirmed 10 days ago
A
Retailer 3
-
£341 GBP
View
A
Retailer 4
-
£353 GBP
View
A
Retailer 5
-
£359 GBP
View
A
Retailer 6
-
£381 GBP
View
A
Retailer 7
-
£384 GBP
View
A
Retailer 8
-
£427 GBP
View
B+
Retailer 9
-
£550 GBP
View
B+
Retailer 10
-
£606 GBP
View
B+
Retailer 11
-
£706 GBP
View
B+
Retailer 12
-
£832 GBP
View
Retailer 13
-
£1,015 GBP
View
Price last confirmed 16 days ago
Most Expensive
B+
Brilliant Earth
21419372A · Nov 4
£1,044 GBP
$1,410 USD
View
13 more retailers have this diamond
Prices start from £341 GBPSave up to £704 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
£341 GBP