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Cushion|Lab Grown|IGI

1.28ct E FL Cushion Lab Grown Diamond

GD • E/FL • IGI LG840622511

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG840622511

Diamond specifications and retailer prices

From $541 SGD
$422 USD
As of October 28, 2026
Save $2,933 SGD (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,473 SGD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.28ct lab-grown cushion diamond

This 1.28ct 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 standard cut grade and certified by IGI LG840622511 or 840622511. Listed at 17 retailers as of October 28, 2026, with prices from $541 to $3,473, a $2,933 spread on the same certified stone. Brilliant Earth lists it at $3,473. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840622511
Dimensions6.20 × 6.14 × 4.10 mm
L/W Ratio1.01
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
6.20 mm6.14 mm1.28 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840622511
Side View
Table 62.0%Crown 35.1°Girdle: MED-STKPavilion 36.2°Culet: NoneDepth 66.8%

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: Oct 28
Current: $3,473 SGD|Low: $541 SGD|High: $3,473 SGD|Avg: $1,573 SGD
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 29, 2026
Retailer 5$541 SGD
Retailer 14$599 SGD
Retailer 11$637 SGD
Retailer 3$901 SGD
Retailer 13$904 SGD
Retailer 6$954 SGD
Retailer 10$1,011 SGD
Retailer 12$1,028 SGD
Retailer 2$1,079 SGD
Retailer 16$1,169 SGD
Retailer 4$1,973 SGD
Retailer 7$1,997 SGD
Retailer 9$2,076 SGD
Retailer 17$2,301 SGD
Retailer 15$2,342 SGD
Retailer 8$2,980 SGD
Brilliant Earth$3,473 SGD

16 data points across 17 retailers

17 retailers$541 SGD to $3,473 SGD

A
Cheapest Retailer
-
$541 SGD
$422 USD
Final sale: no returns
A
Retailer 2
-
$599 SGD
$467 USD
View
A
Retailer 3
-
$637 SGD
£391 GBP
View
A
Retailer 4
-
$901 SGD
$703 USD
View
B+
Retailer 5
-
$904 SGD
$705 USD
View
A
Retailer 6
-
$954 SGD
$744 USD
View
A
Retailer 7
-
$1,011 SGD
€751 EUR
View
A
Retailer 8
-
$1,028 SGD
ZAR 12,963 ZAR
View
B+
Retailer 9
-
$1,079 SGD
£663 GBP
View
B+
Retailer 10
-
$1,169 SGD
$912 USD
View
B+
Retailer 11
-
$1,973 SGD
$1,540 USD
View
B+
Retailer 12
-
$1,997 SGD
View
Retailer 13
-
$2,076 SGD
$1,620 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
$2,301 SGD
$1,795 USD
View
B
Retailer 15
-
$2,342 SGD
£1,439 GBP
View
B
Retailer 16
-
$2,980 SGD
$2,325 USD
View
Most Expensive
B
Brilliant Earth
21861707A · Oct 29
$3,473 SGD
$2,710 USD
View
16 more retailers have this diamond
Prices start from $541 SGDSave up to $2,933 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
1.28ct Cushion
$541 SGD