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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 $591 CAD
$422 USD
As of October 29, 2026
Save $3,202 CAD (84%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $3,793 CAD 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 5 retailers as of October 29, 2026, with prices from $591 to $3,793, a $3,202 spread on the same certified stone. Brilliant Earth lists it at $3,793. 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
Color
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: $3,793 CAD|Low: $591 CAD|High: $3,793 CAD|Avg: $1,721 CAD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 4$591 CAD
Retailer 3$861 CAD
Retailer 2$1,178 CAD
Retailer 5$2,181 CAD
Brilliant Earth$3,793 CAD

1 data point across 5 retailers

5 retailers$591 CAD to $3,793 CAD

A
Cheapest Retailer
-
$591 CAD
$422 USD
Final sale: no returns
A
Retailer 2
-
$861 CAD
$615 USD
View
A
Retailer 3
-
$1,178 CAD
£663 GBP
View
B
Retailer 4
-
$2,181 CAD
SGD 2,106 SGD
View
Most Expensive
B
Brilliant Earth
22348455A · Oct 29
$3,793 CAD
$2,710 USD
View
4 more retailers have this diamond
Prices start from $591 CADSave up to $3,202 CAD

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
$591 CAD