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Cushion|Lab Grown|IGI

1.13ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG818667583

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG818667583

Diamond specifications and retailer prices

From £316 GBP
$423 USD
As of October 28, 2026
Save £1,147 GBP (78%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,463 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.13ct lab-grown cushion diamond

This 1.13ct 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 LG818667583 or 818667583. Listed at 16 retailers as of October 28, 2026, with prices from £316 to £1,463, a £1,147 spread on the same certified stone. Brilliant Earth lists it at £1,463. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.13
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle34.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818667583
Dimensions7.73 × 5.16 × 3.44 mm
L/W Ratio1.50
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
7.73 mm5.16 mm1.13 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818667583
Side View
Table 65.0%Crown 35.8°Girdle: MED-STKPavilion 34.7°Culet: NoneDepth 66.7%

Caratlytics Score

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A+
Exceptional
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 28
Current: £1,463 GBP|Low: £308 GBP|High: £1,933 GBP|Avg: £899 GBP|-24.3%
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
Retailer 15
Retailer 16
October 30, 2026
Retailer 14£316 GBP
Retailer 15£342 GBP
Retailer 2£353 GBP
Retailer 13£515 GBP
Retailer 16£541 GBP
Retailer 10£544 GBP
Retailer 5£546 GBP
Retailer 12£587 GBP
Retailer 9£617 GBP
Retailer 6£855 GBP
Retailer 4£1,128 GBP
Retailer 7£1,189 GBP
Retailer 8£1,224 GBP
Retailer 3£1,331 GBP
Retailer 11£1,342 GBP
Brilliant Earth£1,463 GBP

27 data points across 16 retailers

16 retailers£316 GBP to £1,463 GBP

A+
Cheapest Retailer
-
£316 GBP
$423 USD
Final sale: no returns
A
Retailer 2
-
£342 GBP
$458 USD
View
A
Retailer 3
-
£353 GBP
View
A
Retailer 4
-
£515 GBP
$690 USD
View
A
Retailer 5
-
£541 GBP
$725 USD
View
A
Retailer 6
-
£544 GBP
€694 EUR
View
A
Retailer 7
-
£546 GBP
$731 USD
View
A
Retailer 8
-
£587 GBP
ZAR 12,707 ZAR
View
A
Retailer 9
-
£617 GBP
View
B+
Retailer 10
-
£855 GBP
$1,146 USD
View
B+
Retailer 11
-
£1,128 GBP
$1,511 USD
View
B+
Retailer 12
-
£1,189 GBP
SGD 2,153 SGD
View
Retailer 13
-
£1,224 GBP
$1,640 USD
View
Price last confirmed 12 days ago
B
Retailer 14
-
£1,331 GBP
View
B
Retailer 15
-
£1,342 GBP
View
Most Expensive
B
Brilliant Earth
21418193A · Oct 30
£1,463 GBP
$1,960 USD
View
15 more retailers have this diamond
Prices start from £316 GBPSave up to £1,147 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+
1.13ct Cushion
£316 GBP