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Cushion|Lab Grown|IGI

1.28ct E FL Cushion Lab Grown Diamond

VG • E/FL • IGI LG831680109

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

Certificate IGI LG831680109

Diamond specifications and retailer prices

From $541 SGD
$422 USD
As of October 29, 2026
Save $2,933 SGD (84%) vs most expensive(unlock to see where)
9 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 very-good cut grade and certified by IGI LG831680109 or 831680109. Listed at 9 retailers as of October 29, 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831680109
Dimensions6.10 × 6.07 × 4.05 mm
L/W Ratio1.00
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
6.10 mm6.07 mm1.28 ctE / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831680109
Side View
Table 60.0%Crown 36.7°Girdle: STK-VTKPavilion 36°Culet: NoneDepth 66.7%

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 29
Current: $3,473 SGD|Low: $541 SGD|High: $3,473 SGD|Avg: $1,561 SGD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 8$541 SGD
Retailer 2$635 SGD
Retailer 7$788 SGD
Retailer 3$1,082 SGD
Retailer 5$1,169 SGD
Retailer 6$1,973 SGD
Retailer 9$1,997 SGD
Retailer 4$2,301 SGD
Brilliant Earth$3,473 SGD

2 data points across 9 retailers

9 retailers$541 SGD to $3,473 SGD

A
Cheapest Retailer
-
$541 SGD
$422 USD
Final sale: no returns
Retailer 2
-
$635 SGD
£390 GBP
View
A
Retailer 3
-
$788 SGD
$615 USD
View
A
Retailer 4
-
$1,082 SGD
£665 GBP
View
A
Retailer 5
-
$1,169 SGD
$912 USD
View
B+
Retailer 6
-
$1,973 SGD
$1,540 USD
View
B+
Retailer 7
-
$1,997 SGD
View
B
Retailer 8
-
$2,301 SGD
$1,795 USD
View
Most Expensive
B
Brilliant Earth
22348455A · Oct 29
$3,473 SGD
$2,710 USD
View
8 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