Cushion|Lab Grown|IGI

1.21ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG840633344

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840633344

Diamond specifications and retailer prices

From $453 USD
As of October 30, 2026
Save $1,877 USD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,330 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.21ct lab-grown cushion diamond

This 1.21ct 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 LG840633344 or 840633344. Listed at 17 retailers as of October 30, 2026, with prices from $453 to $2,330, a $1,877 spread on the same certified stone. Brilliant Earth lists it at $2,330. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840633344
Dimensions7.66 × 5.47 × 3.61 mm
L/W Ratio1.40
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
7.66 mm5.47 mm1.21 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840633344
Side View
Table 61.0%Crown 32.5°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 66.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $2,330 USD|Low: $453 USD|High: $2,530 USD|Avg: $1,220 USD|-7.9%
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
Retailer 17
October 31, 2026
Retailer 3$453 USD
Retailer 16$488 USD
Retailer 11$504 USD
Retailer 2$635 USD
Retailer 5$719 USD
Retailer 6$775 USD
Retailer 12$800 USD
Retailer 17$819 USD
Retailer 15$838 USD
Retailer 13$854 USD
Retailer 10$1,172 USD
Retailer 8$1,570 USD
Retailer 4$1,604 USD
Retailer 7$1,692 USD
Retailer 14$1,916 USD
Retailer 9$2,319 USD
Brilliant Earth$2,330 USD

24 data points across 17 retailers

17 retailers$453 USD to $2,330 USD

A
Cheapest Retailer
-
$453 USD
Final sale: no returns
A
Retailer 2
-
$488 USD
View
A
Retailer 3
-
$504 USD
£397 GBP
View
A
Retailer 4
-
$635 USD
View
A
Retailer 5
-
$719 USD
View
A
Retailer 6
-
$775 USD
View
A
Retailer 7
-
$800 USD
£630 GBP
View
A
Retailer 8
-
$819 USD
View
A
Retailer 9
-
$838 USD
ZAR 13,540 ZAR
View
A
Retailer 10
-
$854 USD
€813 EUR
View
B+
Retailer 11
-
$1,172 USD
View
Retailer 12
-
$1,570 USD
View
Price last confirmed 16 days ago
B+
Retailer 13
-
$1,604 USD
View
B+
Retailer 14
-
$1,692 USD
SGD 2,287 SGD
View
B+
Retailer 15
-
$1,916 USD
£1,509 GBP
View
B
Retailer 16
-
$2,319 USD
View
Most Expensive
B
Brilliant Earth
21729045A · Oct 30
$2,330 USD
View
16 more retailers have this diamond
Prices start from $453 USDSave up to $1,877 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
1.21ct Cushion
$453 USD