CaratHunter
Plans
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 $591 CAD
$422 USD
As of October 28, 2026
Save $3,202 CAD (84%) vs most expensive(unlock to see where)
17 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 standard cut grade and certified by IGI LG840622511 or 840622511. Listed at 17 retailers as of October 28, 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
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

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $3,793 CAD|Low: $591 CAD|High: $3,793 CAD|Avg: $1,718 CAD
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$591 CAD
Retailer 14$654 CAD
Retailer 11$695 CAD
Retailer 3$984 CAD
Retailer 13$987 CAD
Retailer 6$1,041 CAD
Retailer 10$1,104 CAD
Retailer 12$1,123 CAD
Retailer 2$1,178 CAD
Retailer 16$1,276 CAD
Retailer 4$2,155 CAD
Retailer 7$2,181 CAD
Retailer 9$2,267 CAD
Retailer 17$2,512 CAD
Retailer 15$2,558 CAD
Retailer 8$3,254 CAD
Brilliant Earth$3,793 CAD

16 data points across 17 retailers

17 retailers$591 CAD to $3,793 CAD

A
Cheapest Retailer
-
$591 CAD
$422 USD
Final sale: no returns
A
Retailer 2
-
$654 CAD
$467 USD
View
A
Retailer 3
-
$695 CAD
£391 GBP
View
A
Retailer 4
-
$984 CAD
$703 USD
View
B+
Retailer 5
-
$987 CAD
$705 USD
View
A
Retailer 6
-
$1,041 CAD
$744 USD
View
A
Retailer 7
-
$1,104 CAD
€751 EUR
View
A
Retailer 8
-
$1,123 CAD
ZAR 12,963 ZAR
View
B+
Retailer 9
-
$1,178 CAD
£663 GBP
View
B+
Retailer 10
-
$1,276 CAD
$912 USD
View
B+
Retailer 11
-
$2,155 CAD
$1,540 USD
View
B+
Retailer 12
-
$2,181 CAD
SGD 2,106 SGD
View
Retailer 13
-
$2,267 CAD
$1,620 USD
View
Price last confirmed 15 days ago
B
Retailer 14
-
$2,512 CAD
$1,795 USD
View
B
Retailer 15
-
$2,558 CAD
£1,439 GBP
View
B
Retailer 16
-
$3,254 CAD
$2,325 USD
View
Most Expensive
B
Brilliant Earth
21861707A · Oct 29
$3,793 CAD
$2,710 USD
View
16 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