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Cushion|Lab Grown|IGI

1.31ct E FL Cushion Lab Grown Diamond

ID • E/FL • IGI LG840634921

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840634921

Diamond specifications and retailer prices

From £346 GBP
$464 USD
As of October 30, 2026
Save £1,422 GBP (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,768 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

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 E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840634921 or 840634921. Listed at 14 retailers as of October 30, 2026, with prices from £346 to £1,768, a £1,422 spread on the same certified stone. Helzberg Diamonds lists it at £1,768. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.31
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634921
Dimensions7.59 × 5.48 × 3.81 mm
L/W Ratio1.39
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
7.59 mm5.48 mm1.31 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634921
Side View
Table 61.0%Crown 35.2°Girdle: STK-THKPavilion 35.8°Culet: NoneDepth 69.5%

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 30
Current: £1,768 GBP|Low: £346 GBP|High: £1,768 GBP|Avg: £920 GBP
Helzberg Diamonds
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 3£346 GBP
Retailer 7£406 GBP
Retailer 11£578 GBP
Retailer 4£605 GBP
Retailer 9£614 GBP
Retailer 8£630 GBP
Retailer 10£658 GBP
Retailer 13£717 GBP
Retailer 5£1,215 GBP
Retailer 14£1,257 GBP
Retailer 12£1,409 GBP
Retailer 6£1,452 GBP
Retailer 2£1,545 GBP
Helzberg Diamonds£1,768 GBP

14 data points across 14 retailers

14 retailers£346 GBP to £1,768 GBP

A
Cheapest Retailer
-
£346 GBP
$464 USD
Final sale: no returns
A
Retailer 2
-
£406 GBP
View
A
Retailer 3
-
£578 GBP
$775 USD
View
A
Retailer 4
-
£605 GBP
$811 USD
View
A
Retailer 5
-
£614 GBP
€784 EUR
View
A
Retailer 6
-
£630 GBP
View
A
Retailer 7
-
£658 GBP
ZAR 14,249 ZAR
View
A
Retailer 8
-
£717 GBP
$961 USD
View
B+
Retailer 9
-
£1,215 GBP
SGD 2,200 SGD
View
B+
Retailer 10
-
£1,257 GBP
$1,684 USD
View
B
Retailer 11
-
£1,409 GBP
View
Retailer 12
-
£1,452 GBP
$1,945 USD
View
Price last confirmed 9 days ago
B+
Retailer 13
-
£1,545 GBP
$2,070 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJKPIH · Oct 30
£1,768 GBP
$2,369 USD
View
13 more retailers have this diamond
Prices start from £346 GBPSave up to £1,422 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
£346 GBP