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Cushion|Lab Grown|IGI

1.31ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846663203

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846663203

Diamond specifications and retailer prices

From £374 GBP
As of November 2, 2026
Save £1,497 GBP (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,870 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.31ct lab-grown cushion diamond

This 1.31ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663203 or 846663203. Listed at 9 retailers as of November 2, 2026, with prices from £374 to £1,870, a £1,497 spread on the same certified stone. Brilliant Earth lists it at £1,870. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663203
Dimensions8.15 × 5.36 × 3.75 mm
L/W Ratio1.52
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
8.15 mm5.36 mm1.31 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663203
Side View
Table 58.0%Crown 31°Girdle: STK-THKPavilion 36.9°Culet: NoneDepth 70.0%

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: Nov 2
Current: £1,870 GBP|Low: £374 GBP|High: £1,908 GBP|Avg: £920 GBP|-2.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 2£374 GBP
Retailer 8£559 GBP
Retailer 5£576 GBP
Retailer 6£718 GBP
Retailer 7£735 GBP
Retailer 9£1,157 GBP
Retailer 4£1,419 GBP
Retailer 3£1,446 GBP
Brilliant Earth£1,870 GBP

9 data points across 9 retailers

9 retailers£374 GBP to £1,870 GBP

A
Cheapest Retailer
-
£374 GBP
A
Retailer 2
-
£559 GBP
$750 USD
View
A
Retailer 3
-
£576 GBP
$773 USD
View
A
Retailer 4
-
£718 GBP
$964 USD
View
A
Retailer 5
-
£735 GBP
€939 EUR
View
B+
Retailer 6
-
£1,157 GBP
$1,552 USD
View
B+
Retailer 7
-
£1,419 GBP
View
B
Retailer 8
-
£1,446 GBP
$1,940 USD
View
Most Expensive
B
Brilliant Earth
22305438A · Nov 2
£1,870 GBP
$2,510 USD
View
8 more retailers have this diamond
Prices start from £374 GBPSave up to £1,497 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
1.31ct Cushion
£374 GBP