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Cushion|Lab Grown|IGI

1.03ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG818663200

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

Certificate IGI LG818663200

Diamond specifications and retailer prices

From £308 GBP
$413 USD
As of October 30, 2026
Save £1,483 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,791 GBP at Brilliant Earth · As of October 30, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818663200 or 818663200. Listed at 14 retailers as of October 30, 2026, with prices from £308 to £1,791, a £1,483 spread on the same certified stone. Brilliant Earth lists it at £1,791. 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
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663200
Dimensions5.98 × 5.93 × 3.83 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
5.98 mm5.93 mm1.03 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663200
Side View
Table 62.0%Crown 36.4°Girdle: MED-STKPavilion 38.9°Culet: NoneDepth 64.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £1,791 GBP|Low: £222 GBP|High: £2,000 GBP|Avg: £774 GBP|-10.4%
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 12£308 GBP
Retailer 6£344 GBP
Retailer 11£467 GBP
Retailer 4£470 GBP
Retailer 13£546 GBP
Retailer 7£552 GBP
Retailer 3£572 GBP
Retailer 9£587 GBP
Retailer 2£617 GBP
Retailer 5£1,022 GBP
Retailer 14£1,128 GBP
Retailer 10£1,294 GBP
Retailer 8£1,342 GBP
Brilliant Earth£1,791 GBP

35 data points across 14 retailers

14 retailers£308 GBP to £1,791 GBP

A
Cheapest Retailer
-
£308 GBP
$413 USD
Final sale: no returns
Retailer 2
-
£344 GBP
$461 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
£467 GBP
$626 USD
View
A
Retailer 4
-
£470 GBP
$630 USD
View
A
Retailer 5
-
£546 GBP
$731 USD
View
A
Retailer 6
-
£552 GBP
€704 EUR
View
A
Retailer 7
-
£572 GBP
$767 USD
View
A
Retailer 8
-
£587 GBP
ZAR 12,711 ZAR
View
A
Retailer 9
-
£617 GBP
View
Retailer 10
-
£1,022 GBP
$1,370 USD
View
Price last confirmed 11 days ago
B
Retailer 11
-
£1,128 GBP
$1,511 USD
View
B
Retailer 12
-
£1,294 GBP
$1,734 USD
View
B+
Retailer 13
-
£1,342 GBP
View
Most Expensive
B
Brilliant Earth
21242362A · Oct 30
£1,791 GBP
$2,400 USD
View
13 more retailers have this diamond
Prices start from £308 GBPSave up to £1,483 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
£308 GBP