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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 $579 SGD
$453 USD
As of November 1, 2026
Save $2,400 SGD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,979 SGD at Brilliant Earth · As of October 31, 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 31, 2026, with prices from $579 to $2,979, a $2,400 spread on the same certified stone. Brilliant Earth lists it at $2,979. 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
Colour
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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $2,979 SGD|Low: $579 SGD|High: $3,234 SGD|Avg: $1,555 SGD|-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
November 1, 2026
Retailer 3$579 SGD
Retailer 16$624 SGD
Retailer 10$642 SGD
Retailer 13$812 SGD
Retailer 5$919 SGD
Retailer 6$991 SGD
Retailer 11$1,014 SGD
Retailer 17$1,047 SGD
Retailer 15$1,071 SGD
Retailer 12$1,083 SGD
Retailer 14$1,498 SGD
Retailer 8$2,007 SGD
Retailer 4$2,051 SGD
Retailer 7$2,164 SGD
Retailer 2$2,437 SGD
Retailer 9$2,965 SGD
Brilliant Earth$2,979 SGD

25 data points across 17 retailers

17 retailers$579 SGD to $2,979 SGD

A
Cheapest Retailer
-
$579 SGD
$453 USD
Final sale: no returns
Retailer 2
-
$624 SGD
$488 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$642 SGD
£395 GBP
View
A
Retailer 4
-
$812 SGD
$635 USD
View
A
Retailer 5
-
$919 SGD
$719 USD
View
A
Retailer 6
-
$991 SGD
$775 USD
View
A
Retailer 7
-
$1,014 SGD
£625 GBP
View
A
Retailer 8
-
$1,047 SGD
$819 USD
View
A
Retailer 9
-
$1,071 SGD
ZAR 13,540 ZAR
View
A
Retailer 10
-
$1,083 SGD
€807 EUR
View
B+
Retailer 11
-
$1,498 SGD
$1,172 USD
View
Retailer 12
-
$2,007 SGD
$1,570 USD
View
Price last confirmed 17 days ago
B+
Retailer 13
-
$2,051 SGD
$1,604 USD
View
B+
Retailer 14
-
$2,164 SGD
View
B+
Retailer 15
-
$2,437 SGD
£1,501 GBP
View
B
Retailer 16
-
$2,965 SGD
$2,319 USD
View
Most Expensive
B
Brilliant Earth
21729045A · Oct 31
$2,979 SGD
$2,330 USD
View
16 more retailers have this diamond
Prices start from $579 SGDSave up to $2,400 SGD

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
$579 SGD