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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 $464 USD
As of October 28, 2026
Save $2,496 USD (84%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,960 USD at Brilliant Earth · As of October 29, 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 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 28, 2026, with prices from $464 to $2,960, a $2,496 spread on the same certified stone. Brilliant Earth lists it at $2,960. 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
Color
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 28
Current: $842 USD|Low: $464 USD|High: $2,369 USD|Avg: $1,230 USD|-13.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 29, 2026
Retailer 13$464 USD
Retailer 7$546 USD
Retailer 9$775 USD
Retailer 2$811 USD
Retailer 6$823 USD
Retailer 1$842 USD
Retailer 8$882 USD
Retailer 11$961 USD
Retailer 3$1,628 USD
Retailer 12$1,684 USD
Retailer 10$1,888 USD
Retailer 4$1,945 USD
Retailer 5$2,369 USD

13 data points across 13 retailers

14 retailers$464 USD to $2,960 USD

A
Cheapest Retailer
-
$464 USD
Final sale: no returns
A
Retailer 2
-
$546 USD
£430 GBP
View
A
Retailer 3
-
$775 USD
View
A
Retailer 4
-
$811 USD
View
A
Retailer 5
-
$823 USD
€784 EUR
View
A
Retailer 6
-
$842 USD
£663 GBP
View
A
Retailer 7
-
$882 USD
ZAR 14,249 ZAR
View
A
Retailer 8
-
$961 USD
View
B+
Retailer 9
-
$1,628 USD
SGD 2,200 SGD
View
B+
Retailer 10
-
$1,684 USD
View
B
Retailer 11
-
$1,888 USD
£1,487 GBP
View
Retailer 12
-
$1,945 USD
View
Price last confirmed 8 days ago
B
Retailer 13
-
$2,369 USD
View
Most Expensive
B
Brilliant Earth
21861646A · Oct 29
$2,960 USD
View
13 more retailers have this diamond
Prices start from $464 USDSave up to $2,496 USD

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
$464 USD